Flow Switches. Liquid Flow Switches. McDonnell & Miller. Mounting Methods

Transcription

1 Liquid Flow Switches The flow of liquids in pipelines plays an important role in industry and commerce. Under most circumstances it is essential to know whether or not there is a flow in a pipeline, and to act upon that knowledge. That is the reason for, and the function of, Flow Switches. A complete line of Liquid Flow Switches has been developed for a wide range of applications and literally hundreds of uses, including: Models FS74E, FS74SE Flow Switches are Underwriters Laboratories Inc. Listed for use in these hazardous locations: Class I, Division I, Group C Atmospheres containing ethylether vapors, ethylene or cyclopropane. Class I, Division I, Group D Atmospheres containing gasoline, petroleum, naphtha, benzene, butane, propane, alcohols, acetone, benzol, Iacquer solvent vapors or natural gas. Class II, Division I, Group E Atmospheres containing dust of aluminum, magnesium or their commercial alloys. Class II, Division I, Group F Atmospheres containing carbon black, coal or coke dust. Class II, Division I, Group G Atmospheres containing flour, starch or grain dusts. Note: For other listings contact the factory. 82 Air Conditioning Hot Water Space Heating Systems Hot Water Supply Systems Pump Systems Water Cooled Equipment Blending or Additive Systems Liquid Transfer Systems Fire Sprinkler Systems Water Treatment Systems Swimming Pool Chlorination Industrial Laser Coolant System Flow Switches All Models FS1W, FS6W FS7-4W, FS8W NEMA Enclosure Type 1 General purpose indoor Type 4X Watertight, Dust tight and Corrosion resistant Type 7 Hazardous Location FS7-4E (Class 1 Group C or D) Type 9 Hazardous Location (Class 2 Group E,F or G) In the tables of flow rates included in this catalog the word Flow means that switch will close one circuit and open the other, when flow rate is increased to the rate shown. The words No-Flow mean the switch will reverse position open first circuit and close the second when flow rate is decreased to the rate shown. NOTE: DO NOT USE LIQUID FLOW SWITCHES ON SYSTEMS WITH FLOW GREATER THAN 10 FEET (3M) PER SECOND. Mounting Methods With Tee Tee Hex or Face Bushing FS7-4W With Face or Hex Bushing With Welded Half-Coupling Half- Coupling With Body Tapped for Direct Installation (Series FS1, FS5 and FS6) FS6

2 FLOW SWITCHES Flow Switches F l ow Switch Installation For best operation, the paddle type flow switches should be installed in a horizontal pipe in the upright position. They should be installed in a threaded pipe tee on 2" or smaller pipe or a welded half coupling when installing on larger welded pipe. OR A. Incorrect Installation Installation in copper pipe requires special attention. The use of thread to sweat adapters to install the flow switch can cause the paddle arm to be out of the flow of water. It is critical that the paddle and paddle arm be in the run of the pipe for proper operation. We have found that a paddle type flow switch may not work properly when installed using a thread to sweat adapter. The width of the paddle needs to be reduced in order to fit through the adapter. The additional height locates the paddle arm and a portion of the paddle above the flow of the water ( A ). This changes the fulcrum point of the mechanism and can result in the paddle hitting the wall of the adapter before it proves. Because the flow switch does not work when first installed, the adjustment screw is turned one way or the other to get it to trip. The combination of trimmed paddle, paddle arm out of flow and attempted adjustment will keep the flow switch from operating properly. B. Suggested Installation C. Suggested Installation If the flow switch is installed in 2 or smaller copper pipe, the use of a threaded reducing tee and thread to sweat adapters on the main run tee connections would be best (B ). Larger pipe may require cutting down the 1 thread to sweat adapter to just below the threads and brazing this piece to a hole in the larger pipe ( C ). The intention is to maintain the 1 or less distance from the wall of the pipe to the top of the thread adapter. Keeping this distance to less than 1 ensures the paddle arm and paddles are in the flow of water. 83

3 H ow To Select Liquid Flow Switch e s 1. What function will the flow switch perform? Flow Switches are equipped with either one or two SPDT switches except for Model FS7-4A (Pneumatic). They can make or break an electrical circuit when flow starts or when flow stops, and can be used to: Actuate a signal when flow stops Start a motor with flow Shut off an alarm when flow is adequate Stop a motor with no flow 2. Size of pipe Flow Switches may be used on pipe sizes 1 /2" - 36". 3. How much flow is present? The flow rate at which the flow switch is to respond should be determined next. Flow Switches are actuated (make or break) with an increase in flow. The term Flow represents the actual movement (velocity) of liquid within a pipe sufficient to actuate the switch. The term No-Flow represents a decrease in velocity, or total flow stoppage, which will permit the switch to return to its original position. IMPORTANT: In operation, the switch must be actuated by Flow before it can be reversed again by No-Flow. All Flow Switches can easily be adjusted in the field to require a higher actuating Flow or No-Flow. 4. Maximum liquid pressure in pipe The maximum pipeline pressure should be considered when selecting a particular model. Different flow switch models can accommodate a range of pipeline pressures up to 1000 psi (70kg/cm 2 ). 5. Maximum temperature Determine the liquid and ambient atmospheric temperature when selecting the flow switch model. Various Flow Switches can be used at ambient temperatures from 32 F (0 C) and liquid temperatures up to 300 F (149 C). If ambient temperatures are lower than 32 F (0 C) use the FS7-4W. 6. Type of liquid Flow Switch models have wetted parts of brass, monel or stainless steel. Depending on the particular model they may be used with water, certain light viscous fluids, some oils, various caustic solutions and other fluids. 7. Atmosphere surrounding flow switch It should be determined if the location will be subject to high humidity, weather conditions or explosive atmospheres. Standard, water tight and hazardous duty flow switch models are available. NOTE: DO NOT USE LIQUID FLOW SWITCHES ON SYSTEMS WITH FLOW GREATER THAN 10 FEET (3M) PER SECOND. 84

4 8. Incompressible fluids Fluid flow within a pipe contains both laminar and turbulent flow. The desired placement of any flow switch is in the more predictable laminar flow regions. Turbulent flow is unpredictable, can cause false indications of flow speed and can cause damage to the flow sensing device. An obstruction of flow such as an elbow, fitting or inlet generates a turbulent wave or wake. For that reason placement is recommend at least 5 pipe diameters downstream for liquid flow switches. In any flow problem, the flow rate in either feet per second (fps) or gallons per minute (gpm) must be established. For your convenience, we have provided the formulas for determining flow in your application. Use the table (below right) to quickly determine the inside area of standard pipes. For nonstandard pipe schedules, determine the inside area by finding the inside diameter and applying the formula to the right. Position of the Flow Switch Installing the flow switch in a horizontal run of pipe is recommended. However because of space limitations, the only available installation may be in a vertical section of pipe. The Series FS4-3, FS8-W and FS5 may be used in this situation as they will generally operate satisfactorily when installed in a vertical pipe with either upward or downward flow (upward flow is preferable) PROVIDED THERE IS NO UNUSUAL AMOUNT OF DIRT OR SEDIMENT IN THE WATER. Flow rates required to actuate the Series FS4-3, FS8W and FS5 are not available for vertical pipe installation. A factory adjusted flow switch normally does not require any field adjustment for upward or downward flow. But to make sure, it is advisable to hold flow switch in position to be installed and check for no flow switch operation by hand operation of the paddle. The Series FS7-4, FS6, and FS1 must be mounted on upperside of horizontal pipe. These units will not operate properly on a vertical pipe. F L O W S W I T C H L O C A T I O N F o r mu l a s Formula for large pipe, higher velocities 1. Velocity in ft. per sec. (FPS) = GPM x Pipe Area in sq. in. Example: With a flow of 1200 GPM through an 8" pipe, determine velocity. Velocity = 2. GPM = 1200 x or 7.7 ft. per sec. Example: With a flow of 6.5 ft. per sec. through a 10" pipe, determine GPM. GPM = 3. LPM = Liters per Minute LPM = 6.5 x GPM = LPM x.264 Velocity in ft. per sec. x Pipe Area sq. in or 1600 GPM Velocity in meters per sec. (MPS) = LPM = GPM.264 Area = D 2 / 4 D = Inside Diameter = 3.14 LPM x.163 Pipe Area in cm 2 Velocity in meters per sec. x Pipe Area in cm Nominal Standard Inside Area Pipe Size Pipe Sq. in. (cm 2 ) in. Schedule No. A 1/ (1.96) 3/ (3.44) (5.57) 11/ (9.65) 1 1 / (13.14) (21.68) 21/ (30.90) (47.68) 31/ (63.81) (82.13) (129) (186) (322) (509) (730) (890) (1181) 85

5 Liquid Flow Switch Specification Chart General Purpose Applications Use on Wetted Parts M a x i m u m Fluid Temperature M i n i m u m Pipe Sizes C o n n e c t i o n P r e s s u r e F ( C) A m b i e n t S w i t c h Model Number i n. N P T B S P T p s i k g / c m 2 M i n. M a x. Temp. F ( C) E n c l o s u r e F S (0) 300 (149) 32 (0) General Purpose F S 4-3 D 1, (0) 300 (149) 32 (0) General Purpose F S 4-3 J (0) 300 (149) 32 (0) General Purpose F S 4-3 RP (0) 300 (149) 32 (0) General Purpose F S 4-3 S (0) 300 (149) 32 (0) General Purpose F S 5-3 / 4 3 / (0) 250 (121) 32 (0) General Purpose F S (0) 250 (121) 32 (0) General Purpose F S 5 - D - 3 / / (0) 250 (121) 32 (0) General Purpose F S 5 - D (0) 250 (121) 32 (0) General Purpose F S 5 - J (0) 250 (121) 32 (0) General Purpose F S 5 - D J - 3 / / (0) 250 (121) 32 (0) General Purpose F S 5 - S (0) 225 (107) 32 (0) General Purpose F S 5 - D S (0) 225 (107) 32 (0) General Purpose F S 8 - W (0) 225 (107) 32 (0) NEMA 4-X F S 8 - W J (0) 225 (107) 32 (0) NEMA 4-X High Sensitivity Applications F S 6-3 / 4 3 / (0) 225 (107) 32 (0) General Purpose F S (0) 225 (107) 32 (0) General Purpose F S 6 - J - 3 / 4 3 / (0) 225 (107) 32 (0) General Purpose F S 6 - J (0) 225 (107) 32 (0) General Purpose F S 6 - W - 3 / 4 3 / (0) 225 (107) 32 (0) NEMA 4-X F S 6 - W (0) 225 (107) 32 (0) NEMA 4-X F S 6 - W J - 3 / 4 3 / (0) 225 (107) 32 (0) NEMA 4-X F S 6 - W J (0) 225 (107) 32 (0) NEMA 4-X F S 1 1 / (0) 225 (107) 32 (0) General Purpose F S 1 - J 1 / (0) 225 (107) 32 (0) General Purpose F S 1 - W 1 / (0) 225 (107) 32 (0) NEMA 4-X 1 D Denotes 2 SPDT Switches 2 With reinforced Stainless Steel paddle 3 Ethylene-Propylene Elastomer 4 Brazed NEMA 4X flow switches are water tight, dust tight and corrosion resistant NEMA7, 9 flow switches are rated for hazardous duty NOTE: DO NOT USE LIQUID FLOW SWITCHES ON SYSTEMS WITH FLOW GREATER THAN 10 FEET (3M) PER SECOND. 86

6 Liquid Flow Switch Specification Chart (continued) Industrial/Heavy Duty Applications Use on Wetted Parts M a x i m u m Fluid Temperature M i n i m u m Pipe Sizes C o n n e c t i o n P r e s s u r e F ( C) A m b i e n t S w i t c h Model Number i n. N P T B S P T p s i k g / c m 2 M i n. M a x. Temp. F ( C) E n c l o s u r e F S / (0) 300 (149) 32 (0) General Purpose F S 7-4 A 1 1 / (0) 300 (149) 32 (0) General Purpose F S 7-4 D / (0) 300 (149) 32 (0) General Purpose F S 7-4 E 1 1 / (0) 300 (149) 32 (0) NEMA 7, 9 F S 7-4 E J 1 1 / (0) 300 (149) 32 (0) NEMA 7, 9 F S 7-4 E L (0) 300 (149) 32 (0) NEMA 7, 9 F S 7-4 E L J (0) 300 (149) 32 (0) NEMA 7, 9 F S 7-4 J 1 1 / (0) 300 (149) 32 (0) General Purpose F S 7-4 D J / (0) 300 (149) 32 (0) General Purpose F S 7-4 L (0) 300 (149) 32 (0) General Purpose F S 7-4 L J (0) 300 (149) 32 (0) General Purpose F S 7-4 S 1 1 / (0) 300 (149) 32 (0) General Purpose F S 7-4 D S / (0) 300 (149) 32 (0) General Purpose F S 7-4 S E 1 1 / (0) 300 (149) 32 (0) NEMA 7, 9 F S 7-4 S E J 1 1 / (0) 300 (149) 32 (0) NEMA 7, 9 F S 7-4 S J 1 1 / (0) 300 (149) 32 (0) General Purpose F S 7-4 S D J 1 1 / (0) 300 (149) 32 (0) General Purpose F S 7-4 S W 1 1 / (-54) 300 (149) -65 (-54) NEMA 4-X F S 7-4 S W J 1 1 / (-54) 300 (149) -65 (-54) NEMA 4-X F S 7-4 W 1 1 / (-54) 300 (149) -65 (-54) NEMA 4-X F S 7-4 W J 1 1 / (-54) 300 (149) -65 (-54) NEMA 4-X F S 7-4 W L (-54) 300 (149) -65 (-54) NEMA 4-X F S 7-4 W L J (-54) 300 (149) -65 (-54) NEMA 4-X 1 D Denotes 2 SPDT Switches 2 With reinforced Stainless Steel paddle 3 Ethylene-Propylene Elastomer 4 Brazed NEMA 4X flow switches are water tight, dust tight and corrosion resistant NEMA 7, 9 flow switches are rated for hazardous duty NOTE: DO NOT USE LIQUID FLOW SWITCHES ON SYSTEMS WITH FLOW GREATER THAN 10 FEET (3M) PER SECOND. 87

7 Flow Velocities Gallons Per Minute (GPM) Liters Per Minute (LPM) Pipe Size () V e l o c i t y M P S 1/2" 3/4" 1 " 11/4" 11/2" 2 " 21/2" 3 " 31/2" 4 " 5 " 6 " L P M V e l o c i t y Pipe Size () F P S 1/2" 3/4" 1 " 1 1 /4" 1 1 /2" 2 " 2 1 /2" 3 " 3 1 /2" 4 " 5 " 6 " G P M

8 Pressure Drop PSI Pipe Size Flow Rate (GPM) (in.) Series /2 FS /4 & 1 FS /4 FS5 3 /4" FS5 1" FS FS8-W /4 FS FS FS FS8-W FS FS kpa Pipe Size Flow Rate (LPM) (in.) Series /2 FS /4 & 1 FS /4 FS5 3/4" FS5 1" FS FS8-W /4 FS FS FS FS8-W FS FS Flow Switches NOTE: DO NOT USE LIQUID FLOW SWITCHES ON SYSTEMS WITH FLOW GREATER THAN 10 FEET (3M) PER SECOND. 89

9 Flow Switches Liquid Series FS250 General Purpose Liquid Flow Switches Universal design serves the widest variety of applications For starting or stopping electrically operated equipment such as signal lights, alarms, motors, automatic burners, metering devices and others Replacement for common flow switches from Johnson/Penn, Potter/Taco, Watts, Hydrolevel and other manufacturers 1" M Pipe Connection Sensitivity adjusting screw makes flow adjustment easy Single pole, double throw snap switch EPDM O-ring sealed Four stainless steel paddles included - 1", 2", 3" & 6" (25, 50, 80, & 150mm) Minimum temperature (fluid or ambient) 32 F (0 C) Maximum temperature 250 F (121 C) Maximum pressure 160 psi (11.2 kg/cm 2 ) Models: FS251 - NEMA1 enclosure FS254 - NEMA4 enclosure FS251 B Flow Switches Dimensions, in. (mm) A B C D E F G FS251 3 (76) 1-1/2 (38) 2-7/32 (56) 7/8 (22) 8-7/ /16 3-3/8 (211) (75) (86) FS /4 1-5/8 3/4 1/2 8-3/8 2-3/4 3-7/8 (83) (41) (19) F (213) (70) (98) O Turn-in Radius H J K L M N (not shown) FS /16 1-1/2 1-1/8 3-7/16 2-1/16 1" 2-5/16 (43) (38) (29) (87) (52) NTPM (59) FS /4 1-1/2 1-1/8 3-7/16 1-7/8 1" 2-5/16 (57) (38) (29) (87) (48) NTPM (59) FS254

10 Flow Switches Liquid Series FS250 (continued) General Purpose Liquid Flow Switches Flow Rates Pipe Mode of Operation Size Flow No Flow in. Settings gpm (lpm) gpm (lpm) 1 Minimum 5.8 (22) 5.1 (19) 27 Maximum 12.6 (48) 11.9 (45) ( 102) Minimum 6.7 (25) 6.0 (23) 47 Maximum 19.1 (72) 18.0 (68) (178) Minimum 8.4 (32) 7.0 (26) 63 Maximum 25.3 (96) 24.1 (91) (242) 2 Minimum 12.9 (49) 11.2 (42) 105 Maximum 31.5 (119) 30.2 (114) ( 397) Minimum 17.9 (68) 14.5 (55) 149 Maximum 43.2 (164) 40.0 (151) (564) 3 Minimum 26.2 (99) 20.2 (76) 230 Maximum 54.9 (208) 49.8 (188) (871) 4 Minimum 42.0 (159) 33.7 (128) 397 Maximum 75.6 (286) 68.0 (257) (1503) 5 Minimum 54.6 (207) 46.7 (177) 654 Maximum (414) 98.4 (372) (2475) 6 Minimum 67.7 (256) 60.2 (228) 900 Maximum (496) (467) (3407) Values are ± 10% Max. Flow Rate gpm (lpm) w/o Paddle Damage Electrical Ratings Motor Switch Rating (Amperes) Voltage Full Load Locked Rotor Pilot Duty 120 VAC VA at 120 or 240 VAC 240 VAC or 60 cycles Ordering Information Model Part Weight Number Number Description lbs. (kg) FS General purpose flow switch-- NEMA1 1.9 (0.9) FS General purpose flow switch-- NEMA4 1.9 (0.9) Flow Switches NOTE: DO NOT USE LIQUID FLOW SWITCHES ON SYSTEMS WITH FLOW GREATER THAN 10 FEET (3M) PER SECOND.

11 F l ow Switches Liquid Series FS4-3 General Purpose Liquid Flow Switches (for specified models) Universal design serves the widest variety of applications For starting or stopping electrically operated equipment such as signal lights, alarms, motors, automatic burners, metering devices and others Replacement for common flow switches from Johnson/Penn, Potter/Taco, Watts, Hydrolevel and other m a n u f a c t u r e r s 1" Two electrical knock-outs allows connection from either end Sensitivity adjusting screw makes flow adjustment easy Single pole, double throw snap switch Hardened stainless steel bearings minimize friction Sealed Monel bellows Four stainless steel paddles included - 1", 2", 3" & 6" (25, 50, 80, & 150mm) Optional features Time delay (5 or 20 seconds) Two SPDT switches to make or break two separate circuits Materials of construction suitable for corrosive liquids Fire sprinkler service - Model FS4-3F only for 1", 1 1 /4", & 1 1 /2" piping only (see chart) next page (p. 89) BSPT threads Minimum temperature (fluid or ambient) 32 F (0 C) Maximum temperature 300 F (149 C) Maximum pressure 160 psi (11.3 kg/cm 2 ) Series FS4-3 Electrical Ratings Motor Switch Rating (Amperes) Voltage Full Load Locked Rotor Pilot Duty 120 VAC VAC Dimensions, in. (mm) A B C D E F G 3 (76) (38) 125 VA at 120 or 240 VAC 50 or 60 cycles 7 8 (22) (56) (211) (75) (86) H J K L M N (43) (37) (29) (87) (52) 1 90

12 F l ow Switches Liquid Series FS4-3 (continued) General Purpose Liquid Flow Switches F l ow Rates Pipe Mode of Operation Size Flow No Flow in. Settings gpm (lpm) gpm (lpm) 1 Minimum 6 ( ) 3. 6 ( ) 27 M a x i m u m ( ) 9. 2 ( ) ( 102.2) Values are ± 10% Minimum 9. 8 ( ) 5. 6 ( ) 4 7 M a x i m u m ( ) 1 5 ( ) ( ) M i n i m u m ( ) 7 ( ) 6 3 M a x i m u m 2 3 ( ) ( ) ( ) 2 M i n i m u m ( ) 9. 4 ( ) M a x i m u m ( ) 2 4 ( ) ( 397.4) M i n i m u m ( 9 2 ) ( ) M a x i m u m ( ) ( ) ( ) 3 M i n i m u m 3 0 ( ) 1 2 ( ) M a x i m u m ( ) ( ) ( ) 4 M i n i m u m ( ) ( ) M a x i m u m ( ) ( ) ( ) 5 M i n i m u m ( ) ( ) M a x i m u m ( ) 9 2 ( ) ( ) Max. Flow Rate gpm (lpm) w/o Paddle Damage 6 M i n i m u m ( ) ( ) M a x i m u m ( ) ( ) ( ) NOTE: DO NOT USE LIQUID FLOW SWITCHES ON SYSTEMS WITH FLOW GREATER THAN 10 FEET (3M) PER SECOND. O rdering Info r m a t i o n Model Part Weight Number Number Description lbs. (kg) F S General purpose flow switch 1. 9 ( 0. 9 ) F S 4-3 J FS4-3 w/bspt connections 1. 9 ( 0. 9 ) F S R P T FS4-3 w/test button 1. 9 ( 0. 9 ) F S 4-3 Z FS4-3 w/ansi terminal connections 1. 9 ( ) F S 4-3 A FS4-3 w/tamper-proof cover screws 2. 0 ( 0. 9 ) F S 4-3 D FS4-3 w/2 SPDT switches 2. 3 ( 1. 0 ) F S 4-3 S FS4-3 w/ss body, monel bellows 1. 9 ( 0. 9 ) F S 4-3 S J FS4-3S w/bspt connections 1. 9 ( 0. 9 ) F S 4-3 D S FS4-3S w/2 SPDT switches 3. 3 ( 1. 5 ) F S R FS4-3 w/5 second DOB 2. 3 ( 1. 0 ) F S FS4-3 w/20 second DOM 2. 3 ( 1. 0 ) F S 4-3 J - E FS4-3J-CE conformance rated 1. 9 ( 0. 9 ) F S 4-3 D - E FS4-3D-CE conformance rated 1. 9 ( 0. 9 ) F S 4-3 S - E FS4-3S-CE conformance rated 1. 9 ( 0. 9 ) See page 132 for CE Conformance information O rdering Info r m a t i o n Model Part Weight Number Number Description lbs. (kg) F S 4-3 F FS4-3 for fire sprinkler service 1. 9 ( 0. 9 ) F S 4-3 F C A N FS4-3 for fire sprinkler service (Canada) 2. 3 ( 1. 0 ) F S 4-3 F FS4-3F w/20 second DOM 2. 3 ( 1. 0 ) F S 4-3 D F FS4-3F w/2 SPDT switches 2. 3 ( 1. 0 ) F S 4-3 D F FS4-3F w/20 second DOM, 3. 3 ( ) 2 SPDT switches For Model FS4-3F & FS4-3DF Pipe Size Paddle to use Length T E E I n. S i z e 1 11 /32" as 1" x 1" x 1" 1" furnished (only) Tee Trim 1 /2" pipe size 1 1 /4" x 1 1 /4" x 1" Tee 1 1 /4" paddle with template (Paddle must be bowed for insertion into 1 1 /4" tee) 2 1 /1 6" as 1 1 /2" x 1 1 /2" x 1" Tee 1 1 /2" furnished (only) (Paddle must be bowed for insertion into 1 1 /2" tee) NOTE: ON LY LISTED PIPE SIZES MEET UL REQUIREMENTS FOR FIRE SPRINKLER SYSTEMS. 91

13 F l ow Switches Liquid Series FS8-W General Purpose Liquid Flow Switches (for specified models) For general purpose applications with environmental exposure, or those requiring a water-tight, dust tight, or a NEMA 4X rated flow switch 1" Sealed Monel bellows Single pole, double throw snap switch Four stainless steel paddles included - 1", 2", 3" and 6" (25, 50, 80 and 150mm) Sensitivity adjusting screw makes flow adjustment easy Optional features BSPT threads Gold plated contacts Minimum temperature (fluid or ambient) 32 F (0 C) Maximum temperature 225 F (107 C) Maximum operating pressure 160 psi (11.3 kg/cm 2 ) Replacement for NEMA 4X-style flow switches from Potter/Taco, Watts, Penn and other manufacturers Series FS8-W Electrical Ratings Motor Switch Rating (Amperes) Voltage Full Load Locked Rotor Pilot Duty 120 VAC VA at 120 or 240 VAC 240 VAC or 60 cycles Model FS8-WG-SL Dimensions, in. (mm) A B C D E F G (83) (213) (59) (87) (45) (83) 92

14 F l ow Rates Pipe Mode of Operation Size F l o w V e l o c i t y No Flow V e l o c i t y in. Settings gpm (lpm) fps (mps) gpm (lpm) fps (mps) 1 M i n i m u m 4. 9 ( ) (. 55 ) 3. 4 ( ) (. 38 ) 27 Values are ± 10% M a x i m u m ( ) ( ) 1 5 ( ) ( ) ( ) M i n i m u m 7. 5 ( ) (. 49 ) 5. 3 ( ) (. 35 ) 47 M a x i m u m 29 ( 110 ) ( 1. 9 ) ( ) ( ) ( ) M i n i m u m 9. 4 ( ) (. 45 ) 6. 7 ( ) (. 32 ) 63 M a x i m u m ( 143 ) ( ) ( 122 ) ( ) ( ) 2 M i n i m u m ( ) (. 4 ) 9. 4 ( ). 9 (. 27 ) 105 M a x i m u m ( ) ( ) ( ) ( ) ( ) M i n i m u m ( ) (. 36 ) ( ). 81 (. 25 ) 149 M a x i m u m ( ) ( ) ( ) ( ) ( ) 3 M i n i m u m ( ) (. 32 ) ( ). 71 (. 22 ) 230 M a x i m u m 89 ( 337 ) ( ) ( 274 ) (. 96 ) ( ) 4 M i n i m u m ( 134 ). 89 (. 27 ) 27 ( 102 ). 68 (. 21 ) 397 M a x i m u m 118 ( 446 ) (. 91 ) 105 ( 397 ) (. 8 ) ( ) 5 M i n i m u m ( 184 ). 78 (. 24 ) ( 142 ). 6 (. 18 ) 654 M a x i m u m ( ) (. 8 7 ) ( ) (. 7 8 ) ( ) 6 M i n i m u m ( 228 ). 67 (. 20 ) ( 177 ). 52 (. 16 ) 900 M a x i m u m ( ) (. 8 3 ) ( ) 2. 5 (. 7 6 ) ( ) O rdering Info r m a t i o n Model Part Weight Number Number Description lbs. (kg) F S 8 - W General purpose flow switch w/nema 4X enclosure 2. 0 ( 0. 9 ) F S 8 - W J FS8-W w/bspt connections 2. 0 ( 0. 9 ) F S 8 - W G FS8-W w/gold plated switch contacts 2. 0 ( 0. 9 ) F S 8 - W G - S L FS8-W w/gold plated switch contacts, sealed leads 2. 0 ( 0. 9 ) F S 8 - W Z FS8-W w/ansi terminal connections 2. 0 ( 0. 9 ) F S 8 - W J A FS8-WJ w/adjusting indicator 2. 3 ( 1. 0 ) F S 8 - W J A - E FS8-WJA- CE conformance rated 2. 3 ( 1. 0 ) See page 132 for CE Conformance information NOTE: DO NOT USE LIQUID FLOW SWITCHES ON SYSTEMS WITH FLOW GREATER THAN 10 FEET (3M) PER SECOND. Max. Flow Rate gpm (lpm) w/o Paddle Damage 93

15 F l ow Switches Liquid Series FS7-4 Industrial Liquid Flow Switches (for specified models) Universal design serves the widest variety of large pipe applications, including heating and hydronic systems, air conditioning, refrigeration and process work 1 1 4" Brass with sealed tube construction Single pole, double throw snap switch Magnetic switching mechanism eliminates need for bellows Sensitivity adjusting screw makes flow adjustment easy Paddles can be trimmed to suit application needs Optional features Extended paddle arm - Model FS7-4L Two SPDT switches to make or break two separate circuits Stainless steel body and paddles BSPT threads Fire sprinkler service - Model FS7-4F- for 1 1 4" thru 2 1 2" piping only (see chart p.93) Minimum temperature (fluid or ambient) 32 F (0 C) Maximum temperature 300 F (149 C) Maximum operating pressure 300 psi (21 kg/cm 2 ) 1000 psi (70 kg/cm 2 ) Stainless Steel models Pneumatic control - FS7-4A - option available w/ 1 8" airline connection; max. 50 psi air supply (non-electrical) Series FS7-4 Electrical Ratings Motor Switch Rating (Amperes) Voltage Full Load Locked Rotor Pilot Duty 120 VAC VA at 120 or 240 VAC 240 VAC or 60 cycles Dimensions, in. (mm) A B C D E F G (73) (37) 7 8 (22) (45) (345) (148) (86) H J K L M N (105) (24) (87) (67) (241) 94

16 F l ow Rates Mode of Operation Size F l o w No Flow M o d e l i n. S e t t i n g s gpm (lpm) gpm (lpm) M i n i m u m 4. 8 ( ) 3 ( ) 47 M a x i m u m 7. 7 ( ) 5. 9 ( ) ( ) M i n i m u m 6. 3 ( ) 3. 6 ( ) 63 M a x i m u m 10 ( ) 7 ( ( ) 2 M i n i m u m 9. 9 ( ) 5. 9 ( ) 105 M a x i m u m ( ) 11 ( ) ( ) M i n i m u m ( ) 9. 5 ( 36 ) 149 M a x i m u m ( ) 17 ( ) ( 564 ) 3 M i n i m u m ( ) ( ) 230 M a x i m u m 35. 5( ) 29. 2( ) ( ) 4 M i n i m u m ( 126 ) ( ) 397 M a x i m u m 61. 4( ) 37. 7( ) ( ) F S M i n i m u m 44. 4( ) 31 ( ) 654 M a x i m u m 84 ( ) 51 ( 193 ) ( ) 6 M i n i m u m 56. 3( ) 48. 7( ) 900 M a x i m u m ( ) 71 ( ) ( ) 8 M i n i m u m 104( ) 89 ( ) 1, 500 M a x i m u m 210( ) 131( ) ( ) 10 M i n i m u m 184( ) 157( ) 2, 500 M a x i m u m 369 ( 1397 ) 231( ) ( ) 12 M i n i m u m 289 ( 1094 ) 247( ) 3, 500 M a x i m u m 582 ( 2203 ) 363 ( 1374 ) ( 13, ) 14 M i n i m u m 387 ( 1465 ) 323 ( 1223 ) 4, 000 M a x i m u m 753 ( 2850 ) 495 ( 1874 ) ( 15, 140 ) 16 M i n i m u m 513 ( 1942 ) 428 ( 1620 ) 5, 000 M a x i m u m 998 ( 3777 ) 656 ( 2483 ) ( 18, 925 ) 20 M i n i m u m 520 ( 1968 ) 260 ( 984 ) 8, 000 M a x i m u m 780 ( 2952 ) 693 ( 2623 ) ( 30, 280 ) 24 M i n i m u m 752 ( 2846 ) 376 ( 1423 ) 12, 000 F S 7-4 L M a x i m u m 1128( 4269 ) 1002( 3793 ) ( 45, 420 ) 30 M i n i m u m 1177( 4455 ) 589 ( 2229 ) 20, 200 M a x i m u m 1766( 6684 ) 1570( 5950 ) ( 76, 457 ) 36 M i n i m u m 1723( 6522 ) 861 ( 3259 ) 28, 270 M a x i m u m 2584( 9870 ) 2297( 8694 ) ( 107, 002 ) Values are ± 10% Max. Flow Rate gpm (lpm) w/o Paddle Damage NOTE: DO NOT USE LIQUID FLOW SWITCHES ON SYSTEMS WITH FLOW GREATER THAN 10 FEET (3M) PER SECOND. O rdering Info r m a t i o n Model Part Weight Number Number Description lbs. (kg) F S Industrial flow switch 5. 5 ( 2. 5 ) F S 7-4 D FS7-4 w/2 SPDT switches 5. 5 ( 2. 5 ) F S 7-4 S FS7-4 w/ss body 5. 0 ( 2. 3 ) F S 7-4 D S FS7-4S w/2 SPDT switches 5. 0 ( 2. 3 ) F S 7-4 J FS7-4 w/ BSPT c o n n e c t i o n s 5. 5 ( 2. 5 ) F S 7-4 S J FS7-4J w/ss body 5. 0 ( 2. 3 ) F S 7-4 S D J FS7-4SJ w/2 SPDT switches 5. 0 ( 2. 3 ) F S 7-4 L FS7-4 w/extended paddle and paddle arm 5. 5 ( 2. 5 ) F S 7-4 L J FS7-4L w/ BSPT c o n n e c t i o n s 5. 7 ( 2. 6 ) F S 7-4 J - E FS7-4J - CE conformance rated 5. 5 ( 2. 5 ) F S 7-4 S J - E FS7-4SJ- CE conformance rated 5. 0 ( 2. 3 ) See page 132 for CE Conformance information O rdering Info r m a t i o n Model Part Weight Number Number Description lbs. (kg) F S 7-4 F FS7-4 for fire sprinkler service 5. 5 ( 2. 5 ) FS7-4F CAN FS7-4 for fire sprinkler service (Canada) 5. 5 ( 2. 5 ) F S 7-4 D F FS7-4F w/2 SPDT switches 5. 7 ( 2. 6 For Model FS7-4F Only Pipe Size Paddle to use Length TEE Size I n " as 1 1 4" x 1 1 4" x 1 1 4" furnished (only) T e e Trim 2" pipe size 1 1 2" x 1 1 2" x " paddle with template T e e " as 2" x 2" x 1 1 4" furnished (only) T e e " as 2 1 2" x 2 1 2" x 1 1 4" furnished (only) Tee (Paddle must be bowed to insert into 1 1 4" opening) NOTE: ON LY LISTED PIPE SIZES MEET UL REQUIREMENTS FOR FIRE SPRINKLER SYSTEMS. 95

17 F l ow Switches Liquid Series FS7-4E Industrial Liquid Flow Switches (for specified models) For hazardous environment applications requiring a NEMA 7 (Class I, Group C or D) or NEMA 9 Class II, Group E, F, or G) rated flow switch 1 1 4" Brass with sealed tube construction Single pole, double throw snap switch Magnetic switching mechanism Sensitivity adjusting screw makes flow adjustment easy Paddles can be trimmed to suit application needs Optional features Extended paddle arm Stainless steel body and paddles BSPT threads Minimum temperature (fluid or ambient) 32 F (0 C) Maximum temperature 300 F (149 C) Maximum operating pressure 300 psi (21 kg/cm 2 ) 1000 psi (70 kg/cm 2 ) Stainless Steel models Series FS7-4E Electrical Ratings Motor Switch Rating (Amperes) Voltage Full Load Locked Rotor Pilot Duty 120 VAC VA at 120 or 240 VAC 240 VAC or 60 cycles D i m e n s i o n s, i n. ( m m ) A B C D E F G (117) (59) (45) (350) (184) (96) H J K L M N (62) (50) (87) (67) (246.6) 96

18 F l ow Rates Pipe Mode of Operation Size Flow No Flow in. Settings gpm (lpm) gpm (lpm) M i n i m u m 4. 8 ( ) 3 ( ) 47 M a x i m u m 7. 7 ( ) 5. 9 ( ) ( ) M i n i m u m 6. 3 ( ) 3. 6 ( ) 63 M a x i m u m 10 ( ) 7 ( ) ( ) 2 M i n i m u m 9. 9 ( ) 5. 9 ( ) 105 M a x i m u m ( ) 11 ( ) ( ) M i n i m u m ( ) 9. 5 ( 36 ) 149 M a x i m u m ( ) 17 ( ) ( 564 ) 3 M i n i m u m ( ) ( ) 230 M a x i m u m ( ) ( ) ( ) 4 M i n i m u m ( 126 ) ( ) 397 M a x i m u m ( ) ( ) ( ) 5 M i n i m u m ( ) 31 ( ) 654 M a x i m u m 84 ( ) 51 ( 193 ) ( ) 6 M i n i m u m ( ) ( ) Values are ± 10% * Equipped with a 6" paddle M a x i m u m ( ) 7 1 ( ) ( ) 8 * M i n i m u m 104 ( ) 89 ( ) 1, M a x i m u m ( ) ( ) ( ) 10* M i n i m u m 184 ( ) 157 ( ) 2, 500 M a x i m u m 369 ( 1397 ) 231 ( ) ( ) 12* M i n i m u m 289 ( 1094 ) 247 ( ) 3, M a x i m u m ( ) ( ) ( 1 3, ) 14* M i n i m u m 387 ( 1465 ) 323 ( 1223 ) 4, M a x i m u m ( ) ( ) ( 1 5, ) 16* M i n i m u m 513 ( 1942 ) 428 ( 1620 ) Max. Flow Rate gpm (lpm) w/o Paddle Damage 5, M a x i m u m ( ) ( ) ( 1 8, ) O rdering Info r m a t i o n Model Part Weight Number Number Description lbs. (kg) F S 7-4 E FS7-4 w/nema 7 & 9 enclosure ( 5. 6 ) F S 7-4 E J FS7-4E w/bspt connections ( 5. 8 ) F S 7-4 E L FS7-4E w/extended paddle ( 5. 6 ) & paddle arm F S 7-4 E L J FS7-4EL w/bspt connections ( 5. 8 ) F S 7-4 S E FS7-4S w/nema 7 & 9 enclosure ( 5. 3 ) F S 7-4 S E J F S 7-4 S E w/bspt connections ( 5. 4 ) F S 7-4 E J - E FS7-4EJ - CE conformance rated ( 5. 8 ) See page 132 for CE Confo rmance info rm a t i o n NOTE: DO NOT USE LIQUID FLOW SWITCHES ON SYSTEMS WITH FLOW GREATER THAN 10 FEET (3M) PER SECOND. 97

19 F l ow Switches Liquid Series FS7-4W Industrial Liquid Flow Switches (for specified models) For applications requiring a water-tight, dust-tight or a NEMA 4X rated flow switch 1 1 4" Brass with sealed tube construction Single pole, double throw snap switch Magnetic switching mechanism eliminates need for bellows Sensitivity adjusting screw makes flow adjustment easy Paddles can be trimmed to suit application needs Optional features Extended paddle arm Stainless steel body and paddles BSPT threads Minimum temperature (fluid or ambient) -65 F (-54 C) Maximum temperature 300 F (149 C) Maximum operating pressure 300 psi (21 kg/cm 2 ) 1000 psi (70 kg/cm 2 ) Stainless Steel models Series FS7-4W Electrical Ratings Motor Switch Rating (Amperes) Voltage Full Load Locked Rotor Pilot Duty 120 VAC VA at 240 VAC or 240 VAC 50 or 60 cycles D i m e n s i o n s, i n. ( m m ) A B C D E F G (117) (59) H J K L M N (62) (45) (350) (184) (96) (50) (87) (67) (246.6) 98

20 F l ow Rates Pipe Mode of Operation Size Flow No Flow in. Settings gpm (lpm) gpm (lpm) M i n i m u m 4. 8 ( ) 3 ( ) 47 M a x i m u m 7. 7 ( ) 5. 9 ( ) ( 177.9) M i n i m u m 6. 3 ( ) 3. 6 ( ) 63 M a x i m u m 10 ( ) 7 ( ) ( ) 2 M i n i m u m 9. 9 ( ) 5. 9 ( ) 105 M a x i m u m ( ) 11 ( ) ( ) M i n i m u m ( ) 9. 5 ( 36 ) 149 M a x i m u m ( ) 17 ( ) ( 564 ) 3 M i n i m u m ( ) ( ) 230 M a x i m u m ( ) ( ) ( ) 4 M i n i m u m ( 126 ) ( ) 397 M a x i m u m ( ) ( ) ( ) 5 M i n i m u m ( ) 31 ( ) 654 M a x i m u m 84 ( ) 51 ( 193 ) ( ) 6 M i n i m u m ( ) ( ) 900 M a x i m u m ( ) 71 ( ) ( ) 8 * M i n i m u m 104 ( ) 89 ( ) 1, 500 M a x i m u m 210 ( ) 131 ( ) ( ) 10* M i n i m u m 184 ( ) 157 ( ) Values are ± 10% * Equipped with a 6" paddle M a x i m u m ( ) ( ) ( ) 12* M i n i m u m 289 ( 1094 ) 247 ( ) Max. Flow Rate gpm (lpm) w/o Paddle Damage 2, , M a x i m u m ( ) ( ) ( 1 3, ) 14* M i n i m u m 387 ( 1465 ) 323 ( 1223 ) 4, 000 M a x i m u m 753 ( 2850 ) 495 ( 1874 ) ( 15, 140 ) 16* M i n i m u m 513 ( 1942 ) 428 ( 1620 ) 5, 000 M a x i m u m 998 ( 3777 ) 656 ( 2483 ) ( 18,925) O rdering Info r m a t i o n Model Part Weight Number Number Description lbs. (kg) F S 7-4 W FS7-4 w/nema 4X enclosure ( 5. 6 ) F S 7-4 S W FS7-4W w/ss body ( 5. 3 ) F S 7-4 W J FS7-4W w/bspt connections ( 5. 6 ) F S 7-4 S W J FS7-4SW w/bspt connections ( 5. 3 ) F S 7-4 W L FS7-4W w/extended paddle ( 5. 8 ) & paddle arm F S 7-4 W L J FS7-4WL w/bspt connections ( 5. 8 ) F S 7-4 W J - E FS7-4WJ - CE conformance rated ( 5. 8 ) See page 132 for CE Confo rmance info rm a t i o n NOTE: DO NOT USE LIQUID FLOW SWITCHES ON SYSTEMS WITH FLOW GREATER THAN 10 FEET (3M) PER SECOND. 99

21 K Factors adjusting paddle length If the flow rate in the pipe exceeds the maximum adjustment on the Flow Switch a change can be made in the paddle length. Modifying the paddle length is a simple procedure that will adapt this equipment to a broader ra n g e of applications. Use the fo l l owing fo rmula as a guide when changing paddle lengths K Paddle Length = Flow Rate (GPM) FS4-3 Example A Calculate paddle length to provide switch action when flow in a 3 inch pipe increases to 100 GPM (366 LPM) Use Maximum Adjustment Flow L= FS7-4 Example B Calculate paddle length to provide switch action when flow in a 3 inch pipe increases to 100 GPM (366 LPM) Use Maximum Adjustment Flow L= FS7-4 Example C = in. ( m m ) =.93 in. ( m m ) 100 Calculate paddle length to provide switch action when flow in a 12 inch pipe decreases to 1200 GPM (4392 LPM) Use Maximum Adjustment No-Flow L= = in. ( m m ) 1200 FS8W Example D Calculate paddle length to provide switch action when flow in a 4 inch pipe increases to 200 GPM (732 LPM) Use Maximum Adjustment Flow FS4-3 K Factor Pipe Flow No-Flow Size Maximum Maximum in. Adjustment Adjustment / FS7-4 K Factor Pipe Flow No-Flow Size Maximum Maximum in. Adjustment Adjustment / / L= 442 = 2.21 in. ( m m ) 200 FS8-W K Factor Pipe Flow No-Flow Size Maximum Maximum in. Adjustment Adjustment /

22 F l ow Switches Liquid Series FS5 General Purpose Liquid Flow Switches For general purpose applications requiring low flow rate sensitivity In-line configuration eliminates need for a pipe tee S i zes ava i l a bl e 3 4" 1" Materials of construction Brass, carbon & EPDM elastomer (for water); Models FS5 & FS5-D Stainless steel, carbon & Buna N (for water or water and petroleum base compounds) Models FS5-S & FS5-DS Single pole, double throw snap switch Sensitivity adjusting screw makes flow adjustment easy Optional feature BSPT threads Minimum temperature (fluid or ambient) 32 F (0 C) Maximum temperature 225 F (107 C) Stainless Steel models 250 F (121 C) Brass Maximum operating pressure 150 psi (10.5 kg/cm 2 ) Electrical Ratings Motor Switch Rating (Amperes) Voltage Full Load Locked Rotor Pilot Duty 120 VAC VA at 120 or 240 VAC 240 VAC or 60 cycles (for specified models) Series FS5 D i m e n s i o n s, i n. ( m m ) A B C D (87) (40) (33) (56) E F G H (129) (83) 7 8 (22) (40.5) O rdering Info r m a t i o n Model Part Weight Number Number Description lbs. (kg) F S General purpose flow switch 2. 5 ( 1. 1 ) 3 4" N P T F S 5 - D F S w/2 SPDT s w i t c h e s 2. 5 ( 1. 1 ) F S 5 - J F S w/bspt connections 2. 5 ( 1. 1 ) F S General purpose flow switch 2. 5 ( 1. 1 ) 1" F S 5 - D FS5-1 w/2 SPDT switches 2. 5 ( 1. 1 ) F S 5 - J FS5-1 w/bspt connections 2. 5 ( 1. 1 ) F S 5 - S FS5-1 w/ss body 2. 3 ( 1. 0 ) F S 5 - D S FS5-1 w/ss body, 2 SPDT switches 2. 5 ( 1. 1 ) F S 5 - J E F S 5 - J CE conformance rated 2. 5 ( 1. 1 ) F S 5 - J -1- E F S 5 - J -1 - CE conformance rated 2. 5 ( 1. 1 ) See page 132 for CE Confo rmance info rm a t i o n J K L M (81) F l ow Rates 7 8 (22) (35) (43) Pipe Mode of Operation Size Flow No Flow in. Settings gpm (lpm) gpm (lpm) 3 4 o r M i n i m u m 1. 5 ( 5. 7 ) 1. 1 ( 4. 2 ) ( ) 1 M a x i m u m 1 5 ( ) 1 0 ( ) 2 7 ( ) Values are ± 10% Max. Flow Rate gpm (lpm) w/o Paddle Damage NOTE: DO NOT USE LIQUID FLOW SWITCHES ON SYSTEMS WITH FLOW GREATER THAN 10 FEET (3M) PER SECOND. 101

23 F l ow Switches Liquid Series FS1 High Sensitivity Liquid Flow Switches (for specified models) For general purpose applications where high sensitivity is required and moderate or low flow rates are encountered such as air conditioning, heating and hydronic systems, water, fuel oil, some viscous liquids and oils in process work In-line configuration eliminates need for a pipe tee High flow capacity 1 2" Single pole, double throw snap switch Switch compartment is completely sealed to protect it from the liquid Sensitivity adjusting screw makes flow adjustment easy Optional features BSPT threads Gold plated contacts Minimum temperature (fluid or ambient) 32 F (0 C) Maximum temperature 225 F (107 C) Maximum operating pressure 100 psi (7 kg/cm 2 ) Series FS1 Electrical Ratings Motor Switch Rating (Amperes) Voltage Full Load Locked Rotor Pilot Duty 120 VAC VA at 120 or 240 VAC 240 VAC or 60 cycles D i m e n s i o n s, i n. ( m m ) A B C D E F G H J (95) (67) (22) (97) (81) (113) (32)

24 F l ow Switches Liquid Model FS1-W High Sensitivity Liquid Flow Switches For applications requiring a water-tight, dust-tight, or a NEMA 4X rated flow switch Model FS1-W D i m e n s i o n s, i n. ( m m ) A B C D E (67) F G H J (87) (140) (32) (35) (67) 1 2 (15) O rdering Info r m a t i o n Model Part Weight Number Number Description lbs. (kg) F S High sensitivity flow switch ( 1. 4 ) 1 2" body F S 1 - G FS1 w/gold plated contacts 3. 0 ( 1. 4 ) F S 1 - J FS1 w/bspt connections 3. 3 ( 1. 5 ) F S 1 - L FS1 1.7gpm 3. 0 ( 1. 4 ) F S 1 - W FS1 w/nema 4X enclosure 3. 5 ( 1. 6 ) F S 1 - J - E FS1-J CE conformance rated 3. 3 ( 1. 5 ) F S 1 - W- E FS1-W CE conformance rated 3. 0 ( 1. 4 ) See page 132 for CE Confo rmance info rm a t i o n F l ow Rates Mode of Operation Flow No Flow Settings gpm (lpm) gpm (lpm) M i n i m u m ( ) (. 91 ) 25 M a x i m u m ( ) ( ) ( 95 ) Values are ± 10% Max. Flow Rate gpm (lpm) NOTE: DO NOT USE LIQUID FLOW SWITCHES ON SYSTEMS WITH FLOW GREATER THAN 10 FEET (3M) PER SECOND. 103

25 F l ow Switches Liquid Series FS6 High Sensitivity Liquid Flow Switches (for specified models) For heavy duty applications where high sensitivity is required, such as water treatment systems, cooling systems for electronic circuits, compressors, booster pumps, and bearings, and other applications that need instant switching In-line configuration eliminates need for a pipe tee Very high flow capacity Actuates at extremely low flow rate Sizes available 3 4" 1" Single pole, double throw snap switch Switch compartment is completely sealed to protect it from the liquid Sensitivity adjusting screw makes flow adjustment easy Optional feature BSPT threads Minimum temperature (fluid or ambient) 32 F (0 C) Maximum temperature 225 F (107 C) Maximum operating pressure 100 psi (7 kg/cm 2 ) Series FS6 Dimensions, in. (mm) A B C D E F G (89) (94.4) (86) 3 4 or (22) (95) 2 (51) Model FS6-W High Sensitivity Liquid Flow Switches For applications requiring a water-tight, dust-tight, or a NEMA 4X rated flow switch Dimensions, in. (mm) Model FS6-W A B C D E F G H 5 (127) (146) 2 (51) (41) (23) (46) 3 4 or ( 8 6 ) 104

26 Electrical Ratings Motor Switch Rating (Amperes) Voltage Full Load Locked Rotor Pilot Duty 120 VAC VA at 120 or 240 VAC 240 VAC or 60 cycles F l ow Rates Pipe Mode of Operation Size Flow No Flow in. Settings gpm (lpm) gpm (lpm) 3 4 o r M i n i m u m. 12 (. 45 ). 06 (. 23 ) 70 (265) 1 M a x i m u m 2. 5 ( ) 1. 5 ( ) Values are ± 10% Max. Flow Rate gpm (lpm) O rdering Info r m a t i o n Model Part Weight Number Number Description lbs. (kg) F S High sensitivity flow switch 4. 5 ( 2 ) 3 4" body F S 6 - J F S w/bspt pipe threads 4. 5 ( 2 ) F S High sensitivity flow switch 4. 5 ( 2 ) 1" body F S 6 - J FS6-1 w/bspt pipe threads 4. 5 ( 2 ) F S 6 - W F S w/nema 4X enclosure 4. 5 ( 2 ) F S 6 - W J F S 6 - W w/bspt connections 4. 5 ( 2 ) F S 6 - W FS6-1 w/nema 4X enclosure 4. 5 ( 2 ) F S 6 - W J FS6-W-1 w/bspt connections 4. 5 ( 2 ) F S 6 - J E F S 6 - J CE conformance rated 4. 5 ( 2 ) F S 6 - J -1-E F S 6 - J -1- CE conformance rated 4. 5 ( 2 ) F S 6 - W J E F S 6 - W J CE conformance rated 4. 5 ( 2 ) F S 6 - W J E FS6-WJ-1 CE conformance rated 4. 5 ( 2 ) See page 132 for CE Conformance information NOTE: DO NOT USE LIQUID FLOW SWITCHES ON SYSTEMS WITH FLOW GREATER THAN 10 FEET (3M) PER SECOND. 105

27 F l ow Switches Liquid Series FS4-3T General Purpose Liquid Flow Switches For starting or stopping electrically operated equipment such as signal lights, alarms, motors, automatic burners, metering devices and others In-line configuration eliminates need for a pipe tee Sizes available 3 4" 1" Paddles available for low, medium or high flow Two electrical knock-outs allows connection from either end Sensitivity adjusting screw makes flow adjustment easy Single pole, double throw snap switch Hardened stainless steel bearings minimize friction Sealed Monel bellows Minimum temperature (fluid or ambient) 32 F (0 C) Maximum temperature 300 F (149 C) Maximum pressure 160 psi (11.3 kg/cm 2 ) O rdering Info r m a t i o n Model Part Weight Number Number Description lbs. (kg) F S 4-3 T " body - high flow rate 3 ( 1. 4 ) F S 4-3 T " body - medium flow rate 3 ( 1. 4 ) F S 4-3 T " body - low flow rate 3 ( 1. 4 ) F S 4-3 T " body - high flow rate 3 ( 1. 4 ) F S 4-3 T " body - medium flow rate 3 ( 1. 4 ) F S 4-3 T " body - low flow rate 3 ( 1. 4 ) F S 4-3 T E F S 4-3 T CE conformance rated 3 ( 1. 4 ) F S 4-3 T 3-1-E FS4-3T3-1 -CE conformance rated 3 ( 1. 4 ) See pages 132 for CE conformance information 106 NOTE: DO NOT USE LIQUID FLOW SWITCHES ON SYSTEMS WITH FLOW GREATER THAN 10 FEET (3M) PER SECOND. Electrical Ratings Motor Switch Rating (Amperes) Voltage Full Load Locked Rotor Pilot Duty 120 VAC VA at 120 or 240 VAC 240 VAC or 60 cycles Dimensions, in. (mm) Pipe Size Mode of Operation Model Flow No Flow Number in. Settings gpm (lpm) gpm (lpm) F S 4-3 T F S 4-3 T F S 4-3 T M i n i m u m 4. 4 ( ) 2. 6 ( 9. 8 ) M a x i m u m 10. 5( ) 9. 8( ) 3 4 M i n i m u m 3. 7 ( 14 ) 2. 2 ( 8. 3 ) M a x i m u m 8. 9 ( ) 8. 3( ) ( ) 3 4 M i n i m u m 2 ( 7. 6 ) 1. 2 ( 4. 5 ) M a x i m u m 4. 5 ( 17 ) 4. 1( ) F S 4-3 T M i n i m u m 5 ( ) 3. 2( ) M a x i m u m 11. 5( ) 11( ) F S 4-3 T M i n i m u m 4. 8 ( ) 2. 9 ( 11 ) 27 M a x i m u m 10. 1( ) 9. 4( ) ( ) F S 4-3 T M i n i m u m 2 ( 7. 6 ) 1. 2 ( 4. 5 ) M a x i m u m 4. 5 ( 17 ) 4. 1( ) A B C D E F G 3 (76) (38) (for specified models) Series FS4-3T F l ow Rates Values are ± 10% 7 8 (22) (56) (175) (75) (86) H J K L M N (43) (33) (29) (78) 3 4 or or 1 Max. Flow Rate gpm (lpm) w/o Paddle Damage

28 F l ow Switches Time Delay Relay s Series T5R Time Delay Relay For Series FS1, FS4-3, FS6, FS7-4 and FS8-W liquid flow switches and Series AF2 and AF3 air flow switches, to add time delay function Provides 5 second delay on break ( o p e n i n g ) c i r c u i t Permits intermittent switching of controlled equipment Eliminates false signals and rapid cycling from turbulence or fluctuations Direct mounting on Series FS4-3, AF2 and AF3 Remote mounting on main control panel or conduit box with Series FS1, FS6, FS7-4 and FS8-W 120 VAC 1 2" lock nut 10" (254mm) lead wires Solid state Completely encapsulated Minimum current 20ma Optional feature 24 Volt Series T5R Series T20 Time Delay Relay For Series FS1, FS4-3, FS6, FS7-4 and FS8-W liquid flow switches and Series AF2 and AF3 air flow switches, to add time delay function Provides 20 second delay on make ( c l o s i n g ) c i r c u i t Permits intermittent switching of controlled equipment Eliminates false signals and rapid cycling from turbulence or fluctuations Direct mounting on Series FS4-3, AF2 and AF3 Remote mounting on main control panel or conduit box with Series FS1, FS6, FS7-4 and FS8-W 120 VAC 1 2" lock nut 10" (254mm) lead wires Solid state No polarity Completely encapsulated Optional features 24 Volt AC 24 Volt DC Minimum current 20 ma Series T20 Electrical Ratings Model Switch Rating Number Input Voltage Maximum Amperes T5R 120 VAC 1 T5R-24V 24 VAC 1 Dimensions, in. (mm) A B C D (41) (45) O rdering Info r m a t i o n 3 4 (19) Model Part Weight Number Number Description lbs. (kg) T 5 R V Time delay relay. 3 (. 1 ) T 5 R - 24 V T5R w/24 volt. 3 (. 1 ) 1 2 Electrical Ratings Model Switch Rating Number Input Voltage Maximum Amperes T VAC 1 AC T20-24V 24 VAC 1 AC T20-24VDC 24 VDC 1 DC Note: 20 milliamperes minimum Dimensions, in. (mm) A B C D (41) (45) O rdering Info r m a t i o n 3 4 (19) Model Part Weight Number Number Description lbs. (kg) T V Time delay relay. 3 (. 1 ) T V T20 w/24 volt AC. 3 (. 1 ) T V D C T20 w/24 volt DC. 3 (. 1 )

29 Air Flow Switches Air Flow Switches sense air flow or no air flow by responding only to velocity of air movement. They provide a positive and economical way to detect change or loss of air flow velocity caused by closed damper or fan inlet, a loose fan wheel, a slipped or broken fanbelt, a dirty or clogged filter, or an overload on a fan motor switch. The Series AF1 flow switches are designed for medium and higher velocity systems. Models AF2 and AF3 are for systems with lower air flow velocities. Air flow switches can be used for a variety of applications such as, but not limited to: Clean Room Filter Systems Duct Type Heating Exhaust Ventilating Air Supply System Air Treatment Systems In the tables of flow rates included in this catalog, the word Flow means that switch will close one circuit and open the other, when flow rate is increased to the rate shown. The words No-Flow mean the switch will reverse position open first circuit and close the second when flow rate is decreased to the rate shown. Flow Switches All Models NEMA Enclosure Type 1 General purpose indoor Type 7 Hazardous Location AFE1 (Class 1 Group C or D) Type 9 Hazardous Location (Class 2 Group E,F or G) Model AFE1 Flow Switches are Underwriters Laboratories Inc. Listed for use in these hazardous locations: Class I, Division I, Group C Atmospheres containing ethylether vapors, ethylene or cyclopropane. Class I, Division I, Group D Atmospheres containing gasoline, petroleum. naphtha, benzene, butane, propane, alcohols, acetone, benzol, Iacquer solvent vapors or natural gas. Class II, Division I, Group E Atmospheres containing dust of aluminum, magnesium or their commercial alloys. Class II, Division I, Group F Atmospheres containing carbon black, coal or coke dust. Class II, Division I, Group G Atmospheres containing flour, starch or grain dusts. Note: For other listings contact the factory. Air Flow Cubic Feet Per Minute (CFM) FPM One Square Foot = Duct Area x FPM CFM Duct Area (12" x 12" = 144 sq. In.) 108

30 How To Select Air Flow Switches 1. What function will the flow switch perform? Air Flow Switches are equipped with single pole double throw switches; consequently, they can be used to make or break an electrical circuit either when flow starts or when flow stops. For example, the Flow Switch can be used to: Actuate a signal when flow stops Start a motor with flow Shut off an alarm when flow is adequate Stop a motor with no flow 2. How much flow is present? The air flow velocity at which the Air Flow Switch is to respond should be determined first. Air Flow Switches are actuated (make or break) with an increase in velocity and will reverse switch position (break or make) with a decrease in velocity. The term Flow represents the actual movement of air (velocity) within a duct sufficient to actuate the switch. The term No Flow represents a decrease in velocity or a total air flow stoppage, which will permit the switch to return back to the original position. I M P O R T A N T : In operation the switch must be actuated by Flow before it can be reversed again by No-Flow. All McDonnell Flow Switches can easily be adjusted to require a higher actuating Flow or No-Flow. 3. Size of duct Air Flow Switches are designed for installation in ducts six inches (150mm) and larger. 4. Maximum temperature Air temperature inside and outside of the duct should be considered. Different Air Flow Switches can be used at temperatures from 32 F (0 C) up to 300 F (149 C). 5. Maximum Velocities The Series AF1 is designed for medium and higher velocity applications up to 2500 fpm (12.7mps). The Models AF2, AF3, and AF3-D are designed for lower air flow velocities with a maximum of 2000 fpm (10.2mps). 6. Type of air Depending on the model, Air Flow Switches have brass, steel, aluminum, stainless steel, Viton and Teflon parts exposed to the inside of the duct. In addition to use with normal air, they may be used in applications where certain chemical fumes or other air-borne elements are present. 7. Installation It is recommended that all models be located in a horizontal duct, 10 duct diameters downstream from fan or 7 duct diameters downstream from an elbow, junction or other cause of turbulence. Often the actual flow rates in the duct appreciably exceed the flow rate required to actuate the switch. If the flow switch must be located closer than 10 duct diameters from a fan, it is recommended that the flow switch be installed on the suction side of the fan. For air flow applications, the air flow switch should be mounted 7 duct diameters downstream of a flow obstruction like an elbow; 10 duct diameters downstream of a blower. D=Duct diameters 7D D 109

31 Air Flow Switch Specifications Horizontal Mounting Operating Maximum Velocity Range Allowable Maximum for Horizontal Operating Air Model Installation Velocity Vane Seal Seal Temperature Number fpm (mpm) fpm (mpm) Material Material Strength Enclosure Switch F ( C) AF1 AF1-S AFE-1 AF2 AF3 AF3-D F l ow Ve l o c i t i e s Model Number AF1 General Brass, Chrome Low Purpose SPDT ( ) (762) Steel Teflon Indoor ( ) (762) ( ) (610) ( ) (610) (72-440) (610) (90-440) (610) Stainless General Steel Viton Medium Purpose SPDT 18-8,302 &316 Indoor Brass, Stainless Steel Aluminum Brass, Steel, Aluminum Brass, Steel, Aluminum Brass, Steel, Aluminum Magnetic lnsulation Hazardous High Duty SPDT Class I & II General Chrome Low Purpose SPDT Teflon Indoor General Chrome Low Purpose SPDT Teflon Indoor General Chrome Low Purpose DPDT Teflon Indoor 300 (149) 300 (149) 275 (135) 300 (149) 275 (135) 275 (135) AF1-S AFE-1 AF2 AF3 AF3-D FPM (MPM) (0) (76) (152) (229) (305) (381) (457) (533) (610) (686) (762) Operating Velocity Range Maximum Allowable Operating Velocity Range 110

32 H ow to Select Air Flow Switch e s ( c o n t i nu e d ) Mounting Methods Horizontal Ducts Air Flow Switch Top Mounting Side Mounting Air Flow Switch Ve rtical Duct (Upward Flow ) Mode of Operation Model Flow No Flow Number Settings fpm (mpm) fpm (mpm) AF1 S t a n d a r d 7 1 /4" (184mm) AF1 Trimmed 2" (51mm) 5 1 /4" (133) M i n i m u m ( ) ( ) M a x i m u m ( ) ( ) M i n i m u m ( ) ( ) M a x i m u m ( ) ( ) AF3 M i n i m u m 450 ( 137 ) 430 ( 131 ) M a x i m u m 1470 ( 448 ) 1395 ( 425 ) A F 3 - D M i n i m u m ( ) ( ) M a x i m u m ( ) ( ) Based on Standard Air pounds per Cubic Foot (1.205 kg/m 3 ) Values are ± 10% Consult factory for downward flow Air Flow Switch Bottom Mounting Density of Air as a Function of Temperature Based on Standard Air Temperature Density F C lbs./ft 3 kg/m Installing the air flow switch in a horizontal duct is recommended. However, if the velocity of air flow exceeds the flow rates shown in the Vertical Duct Chart to the right, the air flow switch may be installed in a vertical duct with upward air flow. 111

33 F l ow Switches Air Series AF1 Air Flow Switches For general purpose applications with medium and high velocity requirements Paddle fits 8" (203mm) minimum duct size, or 6" (152mm) if trimmed Brass, steel and aluminum construction Single pole, double throw snap switch Sensitivity adjusting screw makes flow adjustment easy Two electrical knock-outs allow connection from either end Can be equipped with a time delay relay Optional features Stainless steel Anti-corrosion treatment Minimum ambient temperature 32 F (0 C) Maximum duct temperature 300 F (149 C) O rdering Info r m a t i o n Model Part Weight Number Number Description lbs. (kg) A F Air flow switch 2. 0 (. 9 ) A F 1 - S AF1 w/ss paddle 2. 0 (. 9 ) A F 1 - J AF1 w/corrosion coating 2. 5 ( 1. 1 ) A F 1 - J - E AF1-J-CE conformance rated 2. 5 ( 1. 1 ) See pages 132 for CE conformance information Dimensions, in. (mm) 112 Series AF1 A B C D E F (54) (186) (196) (16) (48.4) (111) G H J K L (48.4) F l ow Rates feet per minute (meters per minute) Horizontal Duct (Recommended Installation) Mode of Operation Paddle Flow No Flow Length Settings fpm (mpm) fpm (mpm) Standard M i n i m u m ( ) ( 5 6 ) 7 1 4" (184mm) M a x i m u m ( ) ( ) Trimmed 2" (51mm) M i n i m u m ( ) ( 6 7 ) 5 1 4" (133mm) M a x i m u m ( ) ( ) Based on Standard Air pounds per Cubic Foot (1.205 kg/m 3 ) Values are ± 10% (for specified models) Electrical Ratings Motor Switch Rating (Amperes) Voltage Full Load Locked Rotor Pilot Duty 120 VAC VA at 240 VAC or 240 VAC 50 or 60 cycles 9 32 (4.2) (40.5) (40.5) (48.4) Vertical Duct (Upward Flow) Mode of Operation Paddle Flow No Flow Length Settings fpm (mpm) fpm (mpm) Standard M i n i m u m 910 ( 277 ) 785 ( 239 ) 7 1 4" (184mm) M a x i m u m 1610 ( 491 ) 1460 ( 445 ) Trimmed 2" (51mm) M i n i m u m ( ) ( ) 5 1 4" (133mm) M a x i m u m ( ) ( ) Based on Standard Air pounds per Cubic Foot (1.205 kg/m 3 ) Values are ± 10%

34 F l ow Switches Air Series AFE-1 Air Flow Switches (for specified models) For industrial hazardous environment applications requiring a NEMA 7 (Class I, Division I, Group C and D) or NEMA 9 (Class II, Division I, Group E, F, and G) rated flow switch for medium velocity 1 2" conduit connection Paddle fits 8" (203mm) minimum duct size Brass, steel and aluminum construction Single pole, double throw snap switch Magnetic switching mechanism eliminates need for bellows Sensitivity adjusting screw makes flow adjustment easy Maximum ambient temperature 120 F (49 C) Maximum duct temperature 275 F (135 C) Electrical Ratings Motor Switch Rating (Amperes) Voltage Full Load Locked Rotor Pilot Duty 120 VAC VA at 120 or 240 VAC 240 VAC or 60 cycles Series AFE-1 O rdering Info r m a t i o n Model Part Weight Number Number Description lbs. (kg) A F E Air flow switch w/nema 7 & 9 enclosure6 ( 2. 7 ) A F E E AFE-1-CE conformance rated 6 ( 2. 7 ) See page 132 for CE Conformance information Dimensions, in. (mm) F l ow Rates feet per minute (meters per minute) Horizontal Duct (Recommended Installation) Mode of Operation Mounting/ Flow No Flow Duct Settings fpm (mpm) fpm (mpm) Top M i n i m u m ( 9 1 ) ( 3 0 ) ( R e c o m m e n d e d ) M a x i m u m ( ) ( ) S i d e M i n i m u m ( ) ( 3 0 ) M a x i m u m ( ) ( ) Based on Standard Air pounds per Cubic Foot (1.205 kg/m 3 ) Values are ± 10% A B C D E F (146) (137.3) (74) (181) (191) G H J K L M (70) (92) (111) (56) (111) (56) 113