Mechanical flow-rate controllers

Transcription

1 L D L D L D Mechanical flow-rate controller MRP-1 (Circular) Description With the circular air flow controllers with automated action, the air flow rate is controlled via an asymmetrical control flap pivoting on a smoothly running bearing, so as to provide highly sensitive response and control even with low flow rates. Manual flow rate setting is also available, by adjusting the tension of the drawing spring according to a scale denoting the desired flow rate. In selecting the controller and sizing of the ducting, the minimum air flow velocity of 2.7 m/s should be ensured. Application These controllers are designed to control air flow rate in circular duct systems. Material Mechanical flow rate controllers MRP-1 are made of galvanised steel sheet. They are laser butt-welded to eliminate sharp seams both inside and outside. The joining ends are calibration pressed in conformance with DIN to provide their extreme stability and accurate fitting. Cushioned control flap: a piston damper prevents vibrations and oscillations of the control flap. On order, mechanical air flow rate controllers are also available with 25 or mm acoustic or thermal insulation. Installation The controller can be installed at any location of the ventilation system. Access to the ducting and the controller shall be provided in conformance with DIN 1946 T2, for the purposes of actuation and maintenance. A minimum 3xL length straight duct section shall be provided on both sides of the controller, to ensure flow stabilisation and efficient controller operation. Inlet and outlet ducting sections should be of equal diameter. The indicated reference air flow velocity is approx. 4.5 m/s. Air flow velocity should be within the range of optimum flow rate. A circular rubber seal provides secure sealing, since the gap between the duct section and the joining end of the controller is thus equalised and kept constant by the weights of joining components. Standard Designs Constant flow air flow rate controller with tight insertion seating (joint dimension only): 1. Automatic control autonomous of external energy sources, with basic factory settings or user selected settings of reference air flow rate; 2. Optional post-installation setting, by means of the setting device; 3. Maximum pressure drop across the controller 0 Pa; 4. Special controller variants available, without the setting device, for unobtrusive installation, suitable for installation in open ducting (this design, however, does not allow flow rate setting after installation); 5. L1 = length of the insertion section, total length = L1 + 2 L2 Examples of installation ø 80-2 ø 315- L L2 L2 L L1 L1 Recommended straight ducting sections L m 2.5D L2 L2 3D 3D SLOT, 319

2 Dimensions air flow rate Nominal dimension mm Allowable air flow range m³/h Optimum air flow range m³/h Max. static pressure drop Pa Recommended duct air velocity m/s Dimension mm min max min max L 1 L ca. 2.7 to ca. 2.7 to ca. 2.7 to ca. 2.7 to ca. 2.7 to ca. 2.7 to ca. 2.7 to ca. 2.7 to ca. 2.7 to Diagram: static pressure drop resulting in the controller response 2 In sizing the air ducting, one shall observe the minimum pressure drop to result in the controller response. p (Pa) 1 0 2,0 3,0 4,0 5,0 6,0 7,0 8,0 9,0 10,0 Calculation example Air flow rate controller: type MRP-1 Nominal length: ND 160 Air flow velocity: 4.5 m³/h Air flow rate: 325 m³/h Δp in Pa, from the diagram 1: Pa v (m/s ) Ordering key MRP 1 / Q / I / Size Ф80,, 125, 140, 160,, 2, 315, I19 Insulation 19 mm I25 Insulation 25 mm I Insulation mm Example: flow rate setting to 120 m³/h 1 Circular design 320

3 Mechanical flow-rate controller MRP-2 (Rectangular) Description Rectangular or square air flow controller is an autonomous control component that maintains, within a defined range, a specified constant air flow rate. The air flow rate is controlled via a control flap pivoting on bearings on both sides, a system of levers and a setting spring. The flap geometry ensures prompt response even under low pressure drops across the controller. The appropriate selection of the spring and the lever geometry lead to a defined correlation between the pressure drop and the position of the flap, thus maintaining a constant air flow rate. Application These controllers are designed to control air flow rate in rectangular duct systems. Their application temperature range is -20 to +110 C. The controller operation starts at the minimum response pressure drop, which is a function of the air flow rate (Diagram 2), and operates up to the maximum pressure drop of 0 Pa, in a stable control range. Across this operation rate, the air flow rate deviations are limited to ±10 %. The controller cross section dimensions (width and height) should be selected equal to the ducting dimensions in order to avoid mechanical deficiencies: excessive pressure drops and increased operation noises. Each flow rate controller is factory set to the flow rate requested by the customer. Within a certain range, the flow rate setting can be changed, by means of the setting device. Material The flow rate controller frame is made of galvanised steel sheet. The control flap is sated in special bearings made of PTFE for resistance against wear. To compensate any air flow oscillations, the controller is fitted by a damper fixed to the control flap, serving to damp any frequencies arising during fast opening or closing of the control flap. In this way, resonance vibrations are avoided. The controller frame and connection parts conform to the sealing requirements for the angular components and class C components of the pren 1751 standard. Installation The controller can be easily installed in the ventilation system by means of its flange section. An important requirement is stable fixing of the ducting system, to prevent oscillations of the ducting in the flexible part during fast opening or closing of the control flap. According to the general rules for the ventilation systems, DIN 1946 Part 2 (VDI rules for ventilation), access shall be provided to the system ducting, for the purposes of adjusting and maintenance. SLOT, Dimensions air flow rate Width B Height H Length L Air flow velocity m/s Max. static Dimensions mm [mm] [mm] [mm] pressure drop Pa

4 Diagram 1: fast selection of air flow rate range according to the duct cross-section 0 00 Calculation example Q (m 3 /h) m/s 3 m/s Existing system: air flow rate controller type MRP-2 Width: mm, height: mm (duct cross.section: 0.08 m²) Parameter to be determined: air flow rate setting range From diagram 1: V (3m/s) = 865 m³/h V (10m/s) = 2880 m³/h 0,02 0,03 0,04 0,05 0,08 0,1 0,15 0, 2 A (m 2 ) Diagram 2: static pressure drop resulting in the controller response p (Pa) 2 1 Calculation example Existing system: air flow rate controller type MRP-2 Width: 2 mm, height: mm Air flow rate 810 m³/h (at air flow velocity 4.5 m/s) Parameter to be determined: static pressure drop Δp in Pa From the selection diagram: Δp = 80 Pa v (m/s) Ordering key MRP 2 / Q / I / Size B x H (example: x ) I19 insulation 19 mm I30 insulation 30 mm Example: flow rate setting to 120 m³/h 2 Rectangular design 322

5 Mechanical flow-rate controller MRP-3 (Circular) Description The circular mechanical flow-rate controller provides a constant volume flow rate in ventilation and air conditioning installations. The controllers operate without an auxiliary power supply. The air flow is regulated mechanically via a regulatory panel, which is mutually bearing and through the leverage of the spring training. The setting of the desired flow can be manual or motor driven. Circular flow rate controller may also have acoustic insulation with mm of mineral wool enclosed with galvanised sheet steel. Application These controllers are designed to control air flow rate in circular duct systems. Their application temperature range is -20 to 70 C. The volume flow rate shall be maintained constant, with a deviation between ± 5 % and ± 10 % at variable pressures between and 0 Pa. External measurements of the controller must suit the measured channel, so as to avoid mechanical failures: pressure loss and a higher level of noise. Material Mechanical flow rate controllers are made of galvanised steel sheet. They are laser butt-welded to eliminate sharp seams both inside and outside. The housing of regulator and connecting pieces comply with the leak tightness classification B in accordance with EN Installation The controller can be installed at any location of the ventilation system. Access to the ducting and the controller shall be provided in conformance with DIN 1946 T2, for the purposes of actuation and maintenance. A minimum 3xΦd length straight duct section shall be provided on both sides of the controller, to ensure flow stabilisation and efficient controller operation. Size V min [m³/h] V max [m³/h] Фd [mm] L [mm] L1 [mm] SLOT, 323

6 Sound power level in the connecting duct (flow noise) Size 80 Size Sound Zvočna power moč level L WA [db(a)] Sound Zvočna power moč level L WA [db(a)] Padec statičnega tlaka Pa [Pa] Volumen Volume pretoka flow zrakav rate [m³/h] Padec statičnega tlaka Pa [Pa] Volumen Volume pretoka flow zrakav rate [m³/h] Size 125 Size Sound Zvočna power moč level L 70 WA [db(a)] Sound Zvočna power moč level L WA [db(a)] 75 Padec statičnega tlaka Pa [Pa] 0 60 Padec statičnega tlaka Pa [Pa] Volumen Volume pretoka flow zrakav rate [m³/h] Volumen Volume pretoka flow zrakav rate [m³/h]

7 Size Size 2 Padec statičnega tlaka Pa [Pa] Sound Zvočna power moč level L WA 75 [db(a)] Volumen Volume pretoka flow zrakav rate [m³/h] Padec statičnega tlaka Pa [Pa] Sound Zvočna power moč level L WA 75 [db(a)] Volumen Volume pretoka flow zrakav rate [m³/h] Size 315 Size 315 Padec statičnega tlaka Pa [Pa] Sound Zvočna power moč level L WA 75 [db(a)] Volumen Volume pretoka flow zrakav rate [m³/h] SLOT, Out of throw area 325

8 Relative sound power level ΔL [db] Average values for all size and pressure drops. Example Relativni nivo zvočne moči L [db] Relative sound power level Frekvenčni Octave mid-frequency spekter [Hz] Specified: Size: 2 Volume flow rate: V = 10 [m³/h] : Δp S = 435 [Pa] Result: Sound power level: L WA = 70 [db(a)] Definition of symbols V (m³/h) Volume flow rate v (m/s) Flow velocity in the incoming cross-section Δp s (Pa) L wa (db(a)) A-weighted sound power level L w-oct (db) Octave sound power level L w-oct = L wa + ΔL ΔL (db) Relative sound power level L WA f (Hz) Octave mid-frequency Sound power L W-Oct for the octave mid-frequencies f [Hz] L WA [db(a)] ΔL 8.5 [m/s] [db] L W-Oct [db] Technical data for actuators: B2 B1 B3 Connection voltage 230 V 24 V = 24 V = Operating range 85 to 265V 19.2 to 28.8V 19.2 do 28.8V Run time for 90 1 s 1 s 1 s Input power supply 6 VA 4 VA 4 VA Energy consumption 2.5 W 2 W 2 W Degree of protection IP 54 IP 54 IP 54 Connection cable 0.75 mm² approx. 1 m 3 core approx. 1 m 3 core approx. 1 m 4 core Ambient temperature -30 to + C -30 to + C -30 to + C 326

9 Wiring diagrams Motor B1 1 wire control 2 wire control Motor B2 1 wire control 2 wire control Motor B3 Continuous AC 24 V DC 24 V Krmilni signal Povratni signal SLOT, Adjusting voltage Status voltage Ordering key MRP-3/Q/Ф/I/B1 B1 24V ON-OFF B2 230V ON-OFF B3 24V continuous I19 Insulation 19 mm I Insulation 19 mm Size Ф80 / / 125 / 160 / / 2 / 315 Q Flow rate 3 Circular design 327

10 Mechanical flow-rate controller MRP-4 (Square) Description The rectangular mechanical flow rate controller provides a constant volume flow rate in ventilation and air conditioning installations. The controllers operate without an auxiliary power supply. The air flow is regulated mechanically via a regulatory panel, which is mutually bearing and through the leverage of the spring training. The setting of the desired flow can be manual or motor driven. Rectangular flow rate controller may also have acoustic insulation with 40 mm of mineral wool enclosed with galvanised sheet steel. Application These controllers are designed to control air flow rate in circular duct systems.their application temperature range is -20 to 70 C. The volume flow rate shall be maintained constant, with a deviation between ± 5 % and ± 10 % at variable pressures between and 0 Pa. External measurements of the controller must suit the measured channel, so as to avoid mechanical failures: pressure loss and a higher level of noise. Material Mechanical flow rate controllers is made of galvanised steel sheet. The housing of regulator and connecting parts comply with the leak tightness classification B in accordance with EN Installation The controller can be easily installed in the ventilation system by means of its flange section. An important requirement is stable fixing of the ducting system, to prevent oscillations of the ducting in the flexible part during fast opening or closing of the control flap. Widht B Height H Lenght L Air flow volume (mm) (mm) (mm) V min (m³/h) V max (m³/h)

11 SLOT, 329

12 ) ] ) Sound power level outside the connecting duct (noise radiation) Example p = [Pa] S Zvočna moč L 1 [d B ( A Zvočna moč L 2 [d B ( A ] W A Sound power W A Sound power Specified: Width B Height H Volume flow rate Flow velocity Result: Sound power level: mm 2 mm V = 10 (m³/h) V a = 4.2 (m/s) Δp S = 2 (Pa) L WA1 = 38 (db(a)) L WA2 = 24 (db(a)) L WA = 62 (db(a)) 0 V = [m ³/h ] v = 3 [m/s] A širina B = [mm] Width 1 H [mm ] Height Višina 330

13 Relative sound power level ΔL (db) Average values for all sizes and pressure drops Relativni nivo zvočne moči L [d B ] Relative sound power level v A =2[m/s] Octave Frekvenčni mid- frequency spekter [Hz] Sound power L W-Oct for the octave mid-frequencies Definition of Symbols V (m³/h) A (m²) v A (m/s) Δp s (Pa) L wa (db(a)) L w-oct (db) ΔL (db) Volume flow rate Incoming cross-section BxH Flow velocity in A A-weighted sound power level L wa = L wa1 + L wa2 Octave sound power level L w-oct = L wa + ΔL Relative sound power level to L WA [Hz] L WA [db(a)] ΔL 4.2 [m/s] [db] L W-Oct [db] SLOT, Technical data for actuators B2 B1 B3 Connection voltage 230 V 24 V = 24 V = Operating range 85 to 265V 19.2 to 28.8V 19.2 to 28.8V Run time for 90 1 s 1 s 1 s Input power supply 6 VA 4 VA 4 VA Energy consumption 2.5 W 2 W 2 W Degree of protection IP 54 IP 54 IP 54 Connection cable 0.75 mm² approx. 1 m 3 core approx. 1 m 3 core approx. 1 m 4 core Ambient temperature -30 to + C -30 to + C -30 to + C 331

14 Wiring diagram Actuator B1 Actuator B2 1 wire control 2 wire control 1 wire control 2 wire control Actuator B3 Continuous AC 24 V DC 24 V Adjusting voltage Status voltage Krmilni signal Povratni signal Ordering key MRP-4/Q/BxH/I/B1 B1 24V ON-OFF B2 230V ON-OFF B3 24V continuous I19 Insulation 19 mm I Insulation mm Size Q Flow rate 4 Square design 332

15 Motor actuators Belimo and Joventa Motor actuators Belimo and Joventa Motor actuators Aplication In the variants of products with motor actuators, the motor actuators of the BELIMO or JOVENTA producer are used. Upon the request of the buyer, products can also be adapted to motor actuators of other producers. It can be chosen from Motors of various powers Connection voltage of 24 V or 220 V ON/OFF regulation or continuous regulation (SR) Type LM Type DA Type SM Type DMN SLOT, CODE Hidria Catalogue B1 J1 B2 J2 B3 J3 B4 J4 B5 J5 B6 J6 B7 J7 B8 J8 B9 J9 B10 J10 B11 J11 B12 J12 B13 J13 MOTOR BELIMO, JOVENTA LM24A DAN 1.N LM230A DAN 2.N LM 24A SR DMN 1.2N NM 24A DAS 1.N NM 230A DAS 2.N NM 24A-SR DMS 1 SM 24A DA 1 SM 230A DA 2 SM 24A SR DM 1.1 SM 230A SR DM 2.2 GM 24A DAG 1 GM 230A DAG 2 GM 24A SR DMG 1.1 The right for technical changes reserved. TORQUE Nm RŽ-2 (H1) RŽ-1, 3, 7 (H1) ZL-1, 2 (D) DL, DL-1, DL all dimensions all dimensions all dimensions