VPA Series and VAP Actuator
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1 VPA Series and VAP Actuator PN6 Flanged Pressure Independent Balancing and Control Valve Product Bulletin PB_VPA_ VPA Pressure Independent Control Valve is a combination of a differential pressure regulator and a regulating valve for flow adjustment. VPA Valves offer a remarkable adjustment flexibility. In combination with VAP actuators they can be set to a specific flow rate value and they allow precise modulating control. The valves always guarantee a suitable flow rate, therefore avoiding too high energy consumption. Since VPA Valve performs the functions of two valves (balancing and adjustment), the installation costs are considerably reduced. The automatic flow rate limitation eliminates system adjustment costs. Since adjustment is very easy to perform, design flow rates can be modified at any time and at low costs. Pressure Independent Balancing and Control Valve includes two functional control elements: Dynamic Balancing Valve and Motorized Actuator. Dynamic Balancing Valve sense and control the pressure/ flow. The max. flow of VPA valve could be set according to the requirement. The flow can be set easily by the actuator potentiometer. The built-in balancing tube has more compact structure and can avoid damages during shipping and installation compared to the external tube. Valve body is made of ductile iron material, with anticorrosion treatment on the surface. High close-off pressure with very low leakage rate. Linear actuator with high control accuracy provides the equal percentage flow curve. Actuator has manual function that allows for manual positioning of the valve.
2 Operating Principle The VPA Valve is made by the following main parts: pressure tap valve body valve seat flow-guiding hole differential pressure regulator The VPA consists in two valves. The upper part is a "push down to close" control valve driven by an electrical proportional actuator and the lower part is differential pressure self-control valve. The lower part stabilizes the differential pressure of upper part, to keep flow constant, no matter how the differential pressure of P-P3 fluctuates. Valve flow Adjustment The Maximum value of the flow can be preset using the potentiometer on the actuator. (See PCB Diagrams). Maximum opening Change the max. valve position between 30%-00% by adjusting the potentiometer arrow. Factory setting 00%
3 Installation and Maintenance Use Conditions The valve has to be mounted with the arrow in the direction of the flow. Mounting it in the wrong direction may damage the system and the valve itself. If flow reversal is possible, a non-return valve should be mounted. 3
4 Operating Control It is necessary to be sure that the valve is actually working in the operating range. In order to verify it, just measure the differential pressure across the valve, as shown in the picture below. If the measured differential pressure is inside at the ΔP Range (see Technical Specifications), the valve is actually keeping the flow stable at the set value. Dynamic Characteristic Curves Using a differential pressure gauge to measure the pressure drop the valve absorbs, allows to check whether the valve is in the operating range (and, therefore, whether there actually is a flow control) by simply verifying that the measured value P - P3 is higher than the start-up value. If the ΔP measured value is lower than the start-up value, then the valve works as a fixed orifice valve. Maintenance procedure:. Shut down the pump of system. 2. Close the shut-off valve, discharge the water to reduce the pressure in pipe. 3. Remove the wiring of actuator. Maintenance and Cleaning During valve cleaning operations, use a damp cloth. DO NOT use any detergent or chemical product that may seriously damage or compromise the proper functioning and the reliability of the valve. 4
5 Ordering Codes VPA Series balancing Valve Valve Model DN (mm) in. PN Closing pressure (bar) Flow Rate (m³/h) l/s GPM Stroke (mm) Actuator ΔP Range (kpa) VPA050-C VAP C 35~400 VPA065-C 65 2-/ VAP C 35~400 VPA080-C VAP C 35~400 VPA00-C VAP C 35~400 VPA25-C VAP C 35~400 VPA50-C VAP C 35~400 Note: Valve closes when valve stem retracts. Technical Specification Rated pressure Connection PN6 Body tappings ISO7- R/4 Leakage rate Media Stroke Protection class DN50 - DN50: Flange IS % of max flow Water, less than 50% glycol 20 mm (DN50~DN65), 40 mm (DN80~DN50) IP54 Media temperature -0 C ~+20 C Differential Pressure Regulator Accuracy Material ± 0% Valve body Valve surface Valve trim Valve Stem Sealing structure Diaphragm Valve stem seal Ductile iron Blue anti-rust painting Stainless steel Stainless steel V model sealing gland + stainless steel spring EPDM PTFE+fluorine rubber 5
6 Dimensions (in mm) L3 H D4 H D H2 D2 K B L2 L DN B D D2 D4 K L L2 L3 H H Weight kg Ø65 4-Ø8 Ø99 Ø Ø85 4-Ø8 Ø8 Ø Ø200 8-Ø8 Ø32 Ø Ø220 8-Ø8 Ø56 Ø Ø250 8-Ø8 Ø84 Ø Ø285 8-Ø22 Ø2 Ø
7 VAP Actuator The VAP actuators have been specifically designed to drive the VPA pressure independent valve. They provide 000N or 3000N according with the valve dimensions. The actuators are used to control the valve and to set the maximum desired flow. In the VAP C model, a display gives several function informations. Ordering Codes VAP series actuator Actuator Model Force Power Supply Control Signal Manual Override Running speed Weight (kg) VAP C 000N 24VAC 0(2)~0V,0(4)~20mA Yes 3.85s/mm(50Hz).7 VAP C 3000N 24VAC 0(2)~0V,0(4)~20mA Yes 3.2s/mm(50Hz) 5.2 Technical Specification Actuator Models VAP C VAP C Rating Force 000N 3000N Power Supply Type of Control 24 V AC Proportional Power Consumption 7.5 VA 5 VA Max. Stroke 22 mm 43 mm Running Speed 3.85s/mm (50 Hz) 3.2s/mm (50 Hz) Weight.7 kg 5.2 kg Enclosure Rating Control Signal Feedback Signal IP54 0(2) ~0 VDC / 0(4) ~20 ma 0(2) ~0 VDC / 0(4) ~20 ma Voltage Input Impedance >00K Current Input Impedance <0.67K Voltage Output Load >K Current Output Load Up and Down Dead Band Ambient Humidity <0.5K 2.5% 95% RH (40 C) Ambient Temperature -0 C~50 C Autocalibration Factory setting: autocalibration starts automatically when power on each time The purpose of this step is to make the actuator matching with the stroke of the valve body.. Turn on the power switch, autocalibration starts automatically. 2. Running light (RUN) flickers (frequency Hz. Actuator stem extends until down limit position, then retracts to up limit position. This moment, actuator can not be controlled by control signal). 3. Running light (RUN) stops flickering after appr. 3 minutes when autocalibration finish. Now actuator matches the stroke of the valve body. Actuator can be controlled by control signal. 7
8 S2/S3 Switch setting DIP Function Description Starting of control / ON 20%: The starting control / feedback signal is 20% (namely 4~20mA or 2~0VDC)* feedback signal OFF 0 The starting control / feedback signal is 0 (namely 0~20mA or 0~0VDC) (factory setting) S2 S3 2* Type of control signal* 3* 4 Selection of control signal* Type of feedback signal Operating mode 2 Losing control signal mode 3 Autocalibration mode 4 Sensitivity ON II current signal OFF UI voltage signal (factory setting) ON UI voltage signal (factory setting) OFF II current signal ON IO current signal OFF UO voltage signal (factory setting) ON DA when control signal is increasing, the actuator stem extends OFF RA when controls signal is increasing, the actuator stem retracts (factory setting) ON DW When control signal (voltage or current type) lost, controlled as the minimum signal (factory setting) OFF UP When control signal (voltage type) lost, controlled as the maximum signal When control signal (current type) lost, controlled as the minimum signal ON DF Self-adaption starts automatically when power on (factory setting) OFF RF Self-adaption starts only when press the self-adaption button manually ON HS The high sensitivity of control signal (VAP C).0% (00%~40%) ;.5% (40%~30%) The high sensitivity of control signal (VAP C).5% (00%~40%) ; 2% (40%~30%) OFF LS The low sensitivity of control signal (VAP C).5% (00%~30%) (factory setting) The low sensitivity of control signal (VAP C) 2% (00%~30%) (factory setting) Note: *To change the input signal to current or voltage, both S2-2 and S2-3 must be set accordingly. Dip switch setting examples ON Factory setting S2 S3 OFF Control signal: 0~0VDC; Feedback signal: 0~0VDC; RA Mode When control signal (voltage type) lost, actuator runs according to the minimum signal; the actuator stem extends, valve close. ON User setting S2 S3 OFF Control signal: 4~20mA; Feedback signal: 4~20mA; RA Mode When control signal (current type) lost, actuator runs according to the minimum signal; the actuator stem extends, valve close. 8
9 Display function (only for VAP C) Basic function Running light (RUN): Red and green double color light. When actuator stem retracts, running light shows red; when actuator stem extends, running light shows green; when do autocalibration, running light flickering both red and green (Hz). Warning light (ERR): When actuator has problem, warning light will be lighting. Display: (from left to right, the first one is function character, the second to the forth are numerical digits). Funtion Character Description Numerical digits Description A Show aperture value Number between precision ± Present aperture value (percent) C F Show control signal on Numerical bit Show feedback signal on Numerical bit Number between 0-00 precision ± Number between 0-00 precision ± Control signal (percent) 0~0V. For example, control signal type is 0~0V, When control signal is V, there will be shown /0*00=0 Feedback signal (percent) 0~0V. For example, feedback signal type is 0~0V, When feedback signal is V, there will be shown /0*00=0 When actuator is running correctly, it shows "C" or "F" alternately in the Display, it means that "control signal" and "feedback signal" shows alternately. Failure when doing autocalibration Yellow warning light is lighting. Running status of actuator: when control signal is bigger than 50% of signal range, actuator stem retracts to up limit position; when control signal is smaller than 50% of signal range, actuator stem extends to down limit position; feedback signal keeps 50%±%. Display status: function character shows "C" or "F" alternately; numerical digits show the present control signal and feedback signal 50 (not the present feedback position). Failure when actuator couldn't run to appointed position: Yellow warning light is lighting. Running status of actuator: actuator stops. Display status: function character shows "C" or "F" alternately; numerical digits show the present control signal value and feedback signal when problem happened. 9
10 PCB Diagram VAP C Actuator Dip switch Autocalibration button ON S2 S2 S OFF FG Potentiometer for flow adjustment Terminal B O O E Y Power light Working light S2 20% II UI I0 S3 DA DW DF HS 0 UI II U0 RA UP RF LS VAP C Actuator Autocalibration button Warning light CPU 自适应按钮故障指示灯 S S2 20% II UI I0 S3 0 UI II U0 ON S2 OFF DA DW DF HS RA UP RF LS S Potentiometer for flow adjustment 开度调节电位器 FG ERR RUN AC24V Numerical Digits Running light Terminal Function character Wiring 24VAC B O O E Y COM Y 0(2)...0VDC/0(4)...20mA U 0(2)...0VDC/0(4)...20mA Terminal B,O 24VAC Power supply O COM for control/feedback signal E Control signal Y Feedback signal Y U Control/Feedback signal 0(2)-0VDC 0(4)-20mA Control signal decreases, actuator stem extends, valve stem retracts, valve close Control signal increases, actuator stem retracts, valve stem extends, valve open Note: It is in DA mode (factory setting). Switch the st Dip switch of S3 from OFF to ON if RA mode (actuator stem extends while control signal increases) is required. 0
11 Dimensions (in mm) mm 28 mm 20 mm 230 mm 234 mm mm mm 84 mm VAP C 60 mm 80 mm 90 mm 225 mm 330 mm Stroke 42 mm max 220 mm 60 mm mm 04 mm VAP C 60 mm Compliance Europe CE Mark Johnson Controls, Inc., declares that this product is in compliance with the essential requirements and other relevant provisions of the EMC Directive 2004/08/EC and Low Voltage Directive 2006/95/EC. Building Efficiency Headquarters: Milwaukee, Wisconsin, USA Branch Officies: Principal Cities World-wide Metasys and Johnson Controls are registered trademarks of Johnson Controls, Inc. All other marks herein are the marks of their respective owners. Copyright 204 Johnson Controls, Inc. All rights reserved. Any unauthorized use or copying is strictly prohibited.
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