DELTA FLOWMETER FOR GAS SERVICE (INSERTION TYPE) MODEL VF SERIES
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1 DETA FOWMETER FOR GAS SERVICE (INSERTION TYPE) MODE VF SERIES GENERA SPECIFICATION GS. No. GBD0-0-E GENERA In the thermistor type Delta meter, a probe inserted in the pipeline detects the representative flow velocity in the line to obtain the total flow information. It is therefore especifically adaptable for metering flows in large pipelines. The probe consists of a basic unit to which a bluff body containing a thermistor sensor is secured and a mounting adaptor. The mounting adaptor comes in two types: fixed version and hot tap version. This insertion type is applicable to pipeline sizes 00 mm and up. FEATURES. Its capability of metering at high accuracy over a broad range of flow makes the instrument ideal for a wide range of gas metering applications.. Has no mechanically moving parts or elements to wear. It therefore withstands continuous service over extended periods of time with no change in its stated accuracy.. The rate of occurrence of output signal pulses in linear to the rate of flow, which simplifies integration with a total counter.. Unaffected by variations in fluid's temperature, pressure, and physical properties. 5. Small pressure loss, a particularly desirable feature in an age of energy saving. 6. Maintenance and inspection is simple. In the hot tap version, the probe can be withdrawn from the pipeline without interrupting the gas flow. 7. The preamplifier, separate from the basic meter, may be installed in any place for maximum ease of management, free from the particular piping conditions. Units provided with a local indicator which enables the operator to make sure of the flowing conditions locally are also available. GENERA SPECIFICATIONS Basic Meter Type of Installation Pipe Dia. Probe Bore Probe Material Bluff Body Max. Operating Pressure MPa Flange Ratings Operating Temp. Range Temp. Span Velocity Range Accuracy Installation Position Nozzle ength Probe Insertion ength Fixed or Hot tap 00~000 mm (8 ~80 ) 50 mm St. Steel (SCSA, SUS0) St. Steel (SUS0) 0~+0 C 50 C 0m/s Within ±% of full scale Horizontal 00 mm 0.5D where D<500 0.D wher D 500. Hot tap type is applicable in cases where fluid flow cannot be interrupted for maintenance/inspection or where flowmeter removal presents a problem.. meter mounting flanges-probe with respect to valve size 00mm ('').. D = pipe size.8 JIS0KFF.0 JIS0KRF.96 ANSI50RF lifier Type Operating Temp. Range Material Item Finish Sensor to Field Wiring. to Receiver Output Signal Power Supply Current Drain Type of explo- Sensor sion protection. Installation Conduit Connection Indicator Scale Full scale PA separate-mount 0~+60 C (Nonexplosion-proof application, 0~+60 C) Waterproof light metal alloy Munsell.5G8/ -conductor shield cable, 0 meters max. (intrisically construction) Cable: CEVS, CVVS -conductor shield cable, km max. (flameproof construction) 0.75~mm or equivalent Transistor open collector output Max. volt x curr.: 7V DC x 0 ma Pulse width: ms. V DC ± V 0 ma Max. Intrinsic safety ing5 Flameproof idg Mounting on '' pipe stand (clamp and bolts furnished) G/ (female) Flameproof packing type connection possible (cable attachment available as an option). 0 ~ 00% graduations (linear scale) Max. flow rate to be 00% OVA Corporation Head Office: Tokyo; Tel Fax Beijing Office: Tel., Fax Tel Overseas Branch Offices: Seoul. Singapore. Taipei
2 FOW RANGES Gases with kg/m density and 5.8 mm /s, and down, kinematic viscosity Unit in m /h Probe Bore 50 mm ( ) - Pipe Dia. mm rate Min. Max. 00 ( 8 ) (0 ) ( ) (6 ) (0 ) ( ) ( ) ,000 (0 ) ,500 (60 ) ,000 (80 ) <In case density and kinematic viscosity of gas to be measured are different from those condition listed in the left> () Minimum flowrate shall be caliculated from the following equation. Qmin = 600 (V or V) A...() Where: Qmin: Minimum rate (m /h) A: Sectional Area of the pipe (m ) : Kinematic viscosity of a liquid in use (mm / S ) : Density of the liquid in use (kg/m ) V, V: velocity (m/s) arger value V = 0., or V =.9(/ ) / is used. () Qmin/Qmax shall be larger than :/m Where: m = Q/Qmin Q: Application minimum flowrate Qmin: Minimum flowrate obtained from the equation () PERFORMANCE CHARACTERISTICS Output Frequency Characteristics by Size Output Freq. (Hz) Pipe Dia. 00mm (8'') 50mm (0'') 00mm ('') 00mm (6'') Probe Bore 50 mm ('') 500mm (0'') 600mm ('') 800mm ('') 000mm (0'') 500mm (60'') 000mm (80'') Q f(hz).6k Q: rate m /h K: Meter Factor /P rate m /h (actual) Pressure Drop 0 0 Pressure Drop Coeff mm (8'') 50mm (0'') 00mm ('') Probe Bore 50 mm ('') 500mm (0'') 600mm ('') 800mm ('') 00mm (6'') 000mm (0'') 500mm (60'') 000mm (80'') Meter Factor Pipe Dia. mm Nominal Meter Factor /P Pulse Freq. at Max. rate Hz Max. rate m /h 00 ( 8 ) (0 ) ( ) (6 ) (0 ) ( ) ( ) ,000 5, rate Q (m /h) (actual) C P = 00 P: Pressure Drop (kpa) : Density (kg/m ) To determine pressure drop, convert the flow rate in m /h (normal) into an actual flow rate under pressure in m /h (actual), find the point C where the actual flow rate intersects a given pipe size (slant line), and substitute it into the equation above. 000 (0 ) (60 ) (80 )
3 Hot Tap Type Fixed Typeon Conduit Connection G/ ø00 Unit in mm Terminal Box Terminal Box Unit in mm ø98 75 ø98 Conduit Connection G/ V Dimension JIS0K 9 JIS0K 05 ANSI50 9 Vent valve (5mm) Ball valve Stroke: s s=y+n+v+5 V t : 50 Y+n+v+559 meter Mtg. Flange Bore 00 mm Direction of Probe ød (Pipe Dia.) 6.5 0, Approx +Y+8, Approx. Mounting Nozzle ength =00mm Std. Insert ength Y= 0.5D or 0.D meter Mtg. Flange Mounting Nozzle ength n (00mm Std.) Direction of Probe ød(pipe Dia.) Insert Y ength 0.D or 0.5D 6.5 Approximate Mass Unit in kg Flange Ratings Hot Tap Varsion Fixed Version JIS0K 97 JIS0K 0 ANSI lifier Terminal Description Units in mm flow indicator Conduit Connection G/ 5(86) 5(06) 80 8 Input Terminal Box ø8 Output Terminal Box +V+V - DC SIG COM 8 5 meter Terminal Box Be sure to ground housing of 6 76 ø98 Conduit Connection G/ Input Terminal Box 66 Max. 0 m Input Terminal Box NOTE: Figures in brackets ( ) apply to the unit without flow indicator
4 MODE CODE NUMBER Code No. Item Description Model V F Thermister Type Delta meter Probe Bore Size mm ( ) Insertion, fixed type Style 5 Insertion, hot tap type Meter body material D St. steel SCSA JIS 0K Pressure rating JIS 0K, ANSI 50 Bluff body material D St. steel SUS0 Sensing Construction Standard lifier construciton Non-explosion proof. mounting 6 Explosion proof lifer model PA 0 None ocal indication indicator provided 0 None Output signal Unfactored pulse output TYPICA PIPING INSTRUCTIONS In making flow measurements with inferential flowmeters, it is generally desired that the flow pattern of fluid coming into the meter be as uniform as possible. For this reason, take flow straightening into consideration when you plan to install a Dealta meter. With OVA flow straightening devices (flow straightener (up to ") and downstream pipe), straight pipe sections are in most cases not required. But if you plan to use straight pipes only, secure the straight pipe section required in accordance with the ISO standards, using a Sch. 0 pipe, as shown in the table. Mounting: Pipeline hold-down span in areas where the meter is installed should be short enough to minimize vibration to the meter. Pulsation: If pulsation is present, adhere to the following condition: 0.7 V N < 00 where N: Pulsation pressure (kpa) : Density of fluid in service (kg/m ) v: Minimum flow velocity (m/s) Piping Condition Req d of ength Straight Pipe() Description Reducer 5D min. A concentric reducer upstread of meter. D min. An elbow upstream of meter. Elbow 5D min. Two elbows in horiz. plane upstream of meter. 0D min. Two elbows in vert. plane upstream of meter. Sluice Valve 5D min. A fully open sluice valve upstream of meter. Secure downstream straight pipe length greater than 5D. "D" denotes pipeline diameter, not probe bore.
5 HOOKUP WITH RECEIVING INSTRUMENTS Actual Totalization and Instantaneous Indication ine temperature and pressure are considered approximately constant and correction factor can be multiplied as constant: Total Indication Converter (SU08) Totalizer (E0) Instantaneous Indication Converter (SU5) Indicator (E) Total and Instantaneous Indication ~ 0 ma DC or ~ 5 V DC Converter/ Compensator (E08 ) Pulse output ine temperature and pressure are automatically compensated, and total and instantaneous flow readout output) are obtained: Total and Instantaneous Indicator ~ 0 ma DC OVA MODE E000 Unfactored Pulse Computer (E000) Factored Pulse Pressure Transmitter Thermometer Bulb V DC power source is required for the preamplifier. In case of using a receiving instrument incapable of furnishing V DC, use OVA pulse repeater Model SU08. For details of individual receiving instruments, refer to respective general specification sheets. 5
6 When making inquiries, please advise the following: (fill in the blanks or check [ ] with mark). Name of gas:. range:. Temperature range:. Pressure range: 5. Sp. weight or sp. gr. 6. Viscosity: 7. Connections: 8. straightening devices: 9. Flange rating: 0. ocal indication:. Compensation: Max. Normal Min. [ ] m /h (normal) [ ] m /h (actual) Max. Normal Min. C Max. Normal Min. [ ] MPa (gauge) [ ] Density kg/m (normal), [ ] kg/m (actual) Sp. Gr. [ ] mpa s [ ] mm /s at C Bore [ ] inch [ ] mm [ ] Req d [ ] Not req d (If not required, please prepare the straightening pipe and downstream pipe of specific length, bore and sch. no.) [ ] JIS K, [ ] ANSI Class [ ] FF [ ] RF [ ] Req d [ ] Not req d [ ] Temp. and press. compensation [ ] Press. compensation [ ] Temp. compensation. Compensation range:. Compensation referance:. Compression coefficient: 5. Individual accuracy testing: Temp. ~ C Ref. temp. C [ ] Req d [ ] Not req'd Press. ~ MPa (gauge) Ref. Press. MPa (gauge) 6. Receiving instruments: [ ] Totalizer [ ] Indicator [ ] Indicating recorder [ ] Others ( ) 7. Other information: (Types, specifications, etc. of electrical instruments to be coupled) The specification as of June, 006 is stated in this GS Sheet. Specifications and design are subject to change without notice. Sales Representative:
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