MPV1 INSTALLATION & MAINTENANCE INSTRUCTIONS

Transcription

1 MPV1 INSTALLATION & MAINTENANCE INSTRUCTIONS DESCRIPTION / IDENTIFICATION The MPV1 series valve uses Proportion- Air closed loop technology for pressure control. It gives an output pressure proportional to an electrical command signal input. The MPV1 is a complete closed loop control valve consisting of valves, manifold, and electronic controls. Pressure is controlled by the use of two solenoid valves. One valve functions as inlet control, the other as exhaust. The MPV1 output pressure is proportional to the voltage supplied by the control circuit. The proportional valve operates proportionally to the flow required to maintain that pressure. The variable orifice in the proportional valve allows precise control of pressure at low flow conditions and avoids the digital steps of traditional ON/OFF solenoids. The exhaust solenoid is a traditional ON/OFF solenoid and allows excess media to be vented from the system. The pressure output is measured by a pressure transducer internal to the MPV1 and provides a feedback signal to the electronic controls. This feedback signal is compared with the command signal input. A difference between the two signals causes one of the solenoid valves to open, allowing flow in or out of the system. Accurate pressure is maintained by controlling these two valves. A monitor output is provided for the system measurement. All MPV1 valves come standard with a 0-10Vdc analog monitor output from the internal pressure transducer. The MPV1 is designed to have "Universal Mounting" capabilities which include DIN rail, panel mount, or manifold mounting for use on a sub-base for multiple unit applications. Sub-base configurations are available from 2-12 units (consult factory for more units). The sub-base offers a common supply and exhaust port with individually controlled outlet ports to minimize plumbing connections and maximize installation/maintenance efficiency. PANEL MOUNT DIN RAIL MOUNT MANIFOLD MOUNT 1/8 INMPV1

2 SPECIFICATIONS MIN TYP MAX TERM ELECTRICAL Supply Voltage Vdc Supply Current ma max Command Signal Voltage 0-10 Vdc Command Signal Impedance Voltage K Ohms Monitor Signal mA PHYSICAL Operating Temperature 32 (0) (70) F ( C) Weight per unit (sub-base not included) (0.3) - Lb (Kg) MECHANICAL Pressure Ranges 29.9 in. Hg (vac) ² 760 mm Hg (vac) Max. Cv Capacity ¹ Min. Closed End Volume - 1 (17) - in³ (cm³) Filtration Recommended micron Hysteresis % F.S. ³ Repeatability % F.S. Accuracy / Linearity % F.S. Resolution % F.S. Temperature Effect % F.S. 4 Wetted Parts Elastomers..Fluorocarbon, Nitrile Manifold.Brass Valves.Nickel plated brass P. Transducer...Silicon, Aluminum, RTV ¹ Determined by the size of the inlet valve orifice size (see ORDERING INFORMTION). ² MPV1 units for vacuum only service are designed to provide pressure control of a vacuum level that is linearly proportional to an analog electronic command. Vacuum only service units always provide a higher level of vacuum for a higher analog command. A typical example is 4-20mA = 0-20in Hg vacuum, where 4mA gives 0in Hg and 20mA gives 20in Hg vacuum. ³ Hysteresis approaches zero when under flow conditions. For closed system, the hysteresis is dependent on the system and the valves settings. 4 Over range 0 to 50 degree C Before you get started, please read these warnings: Psig Bar Examine the product. Ensure that you received what you ordered. Read this guide first before you start and save it for later use. You must have a good understanding of what the adjustments are on this product before using them. All compressed air and power should be shut off before installing, removing or performing maintenance on this product. Installation and use of this product should be under the supervision and control of properly qualified personnel in order to avoid the risk of injury or death. 2/8 INMPV1

3 DIN Rail Mount MPV1 CONNECTION PROCEDURE Panel Mount Mounting The DIN rail MPV1 servo valve comes assembled to a DIN rail with a universal foot to allow all modules to be snapped onto all available DIN footprints: Mounting The panel mount MPV1 servo valve can be assembled to a panel by inserting two 8-32 socket head cap screws into the manifold and torque each screw into the panel (figure 3). Figure 3 Pneumatic Connections 1. Apply a small amount of anaerobic sealant to the male threads of the in-line filter supplied with the MPV1. Panel Mount Figure 1 Pneumatic Connections 1. Apply a small amount of anaerobic sealant to the male threads of the in-line filter supplied with the MPV1. 2. Connect supply pressure to the I port (figure 2) not to exceed rated supply pressure. (See table 1) 3. Connect the outlet O port (figure 2) to the device being controlled. 4. Proceed with electrical connection. DIN Rail Mount Figure 2 2. Connect supply pressure to the I port (figure 4) not to exceed rated supply pressure. (See table 1) 3. Connect the outlet O port (figure 4) to the device being controlled. 4. Proceed with electrical connection. Figure 4 TABLE 1 RATED INLET PRESSURE FOR STANDARD MPV1 VALVES For valves ordered with MAX. calibrated pressure MAX. inlet pressure Vacuum up to 10 psig (0.69 bar) 15 psig (1 bar) 10.1 up to 30 psig (0.70 up to 2 bar) 35 psig (2.4 bar) 31 up to 100 psig (2.1 up to 7 bar) 110 psig (7.6 bar) 3/8 INMPV1

4 MPV1 Manifold Mounting: Installation: 1. Install the three O-rings in the O-ring grooves of the sub-base manifold. (figure 5, ref E) 2. Align the MPV1 servo control valve over the three O-rings. Orientation of the MPV1 unit should be the same for all MMs on the manifold and can be determined by the I and E marks on the MPV1 brass manifold and the aluminum sub-base manifold (figure 5, ref item H). 3. Insert the two cap screws that hold the servo valve to the sub-base manifold. Torque each screw to 8 in-lbs and then torque each cap screw to inlbs (figure 5, ref item D). 4. To install the sub-base manifold to a panel use 1/4-20 socket head mounting screws (figure 5, ref item A). Removal: 1. Disconnect supply air and the electrical connector from the MPV1 servo valve to be removed. 2. Remove the cap screws that mount the MPV1 servo valve to the sub-base manifold (figure 5, ref item D). 3. The MPV1 servo valve may now be lifted free of the sub-base manifold. Be careful to retain the three O-rings in their grooves on the sub-base manifold (figure 5, ref item E). Figure 5 Pneumatic Connections 1. Connect supply pressure to the I port (figure 5, ref item H) not to exceed rated supply pressure. (See table 1) 2. Connect the O port (figure 5, ref item B) to the device being controlled. 3. Proceed with electrical connection. Vacuum Only Units Pneumatic Connections 1. Apply a small amount of anaerobic sealant to the male threads of the in-line filter supplied with the MPV1. 2. Connect vacuum supply to the E port (figure 6). Vacuum Supply 3. Connect supply pressure to the I port (figure 6) not to exceed rated supply pressure (See table 1) or leave it open to atmosphere. 4. Connect the outlet O port (figure 6) to the device being controlled. 5. Proceed with electrical connection. Figure 6 To Application Atmospheric or Slightly Positive Pressure 4/8 INMPV1

5 Electrical connections 1. Ensure all power is off before making any electrical connections. 2. Figure 7 shows the location of the MPV1 electrical connector and Table 2 identifies each connection. 3. See figure 8 for voltage command wiring, and figure 9 for voltage monitor wiring. Voltage command valves: All voltage command MPVs use common mode voltage, meaning the DC Common pin is the common reference for both power and command. Figure 8 shows the proper connections. Figure 7 Figure 8 Voltage monitor: See figure 9 for voltage monitor feedback signal wiring. Figure 9 5/8 INMPV1

6 RE-CALIBRATION PROCEDURE : All MPV1 control valves come calibrated from the factory by trained personnel using precision calibration equipment. The QPV valve is a closed loop control valve using a precision electronic pressure sensor. Typical drift is less than 1% over the life of the product. If your MPV1 valve appears to be out of calibration by more than 1%, it is not likely to be the MPV1. Check the system for adequate supply pressure, wiring and electronic signal levels. Verify the accuracy of your measuring equipment before re-calibrating. Consult factory if you have any questions or require assistance. If the MPV1 valve needs re-calibration, use the procedure described below: MPV1 VALVES: NOTE: There must be a closed volume of at least 1 cu.in. (17cc) between the valve outlet and the measuring device for the valve to be stable. MPV1 valves work best when there is a small leak downstream. 1. Wire control valve according to the section titled Electrical Connections. 2. Connect a precision measuring gauge or transducer to the outlet port of the MPV1. 3. Plumb control valve according to section titled Pneumatic Connections. Make sure supply pressure does not exceed the rating for the valve (see table 1). 4. On the printed circuit board, locate the two adjustment potentiometers labeled P-S (span adjust) and P- Z (zero adjust). (See figure 12) NOTE: The MPV1 uses an advanced analog PID circuit to modulate the internal solenoid valves. These four potentiometers (Proportional, Integral, Bias and Exhaust Trip Point) are set at the factory and should not require adjustment. These settings are based on the specific parameters of your application. If the response of the MPV1 requires adjustment, contact the factory for special instructions. Figure 12 PID SETTING Should not require adjustment. Set at the factory based on specific parameters of your Application. 5. Set the electrical command input to MAXIMUM value. 6. Adjust the SPAN potentiometer until MAXIMUM desired pressure or vacuum is reached (clockwise to increase pressure). 7. Set the electrical command input to 10 percent of full value (1Vdc for 0-10Vdc unit ). 8. Adjust the ZERO potentiometer until 10 percent of maximum desired pressure or vacuum is reached. (clockwise increases pressure). 9. The ZERO and SPAN potentiometers interact slightly. Repeat steps 5-8 until no error exists. 10. Verify unit shuts off by going to zero command. Check linearity by going to at least six setpoints throughout the full range. NOTE: Only use this step if your device is totally out of calibration. If it is slightly out of calibration, omit this step and move on to paragraph 5. Using a small screwdriver, turn both potentiometers 15 turns clockwise. Then turn them 7 turns counter clockwise. This will put the MPV1 roughly at mid scale. 6/8 INMPV1

7 DIMENSIONS Panel Mount MPV1 DIN Rail MPV1 MANIFOLD MOUNT 7/8 INMPV1

8 ORDERING INFORMATION MPV 1 M B F E E 100 G X Sxx SERIES MODEL 1 = SINGLE LOOP MOUNTING METHODS M = MANIFOLD MOUNT P = PANEL MOUNT D = DIN RAIL MOUNT PID SETTING MONITOR B = BSPT BLANK = NPT COMMAND INPUT E = VOLTAGE 0-10 VDC MONITOR SIGNAL E = 0-10VDC MAXIMUM CALIBRATED RANGE EXAMPLES 100 = PSI 001 = 0-1 PSI N20= atm-20 in Hg Vacuum * Pressure ranges not starting at 0 psig are available. Consult factory for ordering information. INLET VALVE ORIFICE SIZE EXHAUST VALVE FACTORY DETERMINED (Depends on the application flow & pressure specs) EXAMPLE A = B = C = D = SPECIAL OPTIONS* * Consult Factory for Special Options Cx REQUIRED FOR ALL MPV VALVES Factory determined based on the specifications of the application DIN RAIL MOUNT KIT DRMKT-01 PANEL MOUNT KIT PMK-MM SUB-BASE MANIFOLD* SBM-5 NUMBER OF MOUNTING POSITIONS SUB-BASE ASSEMBLY ASSEMBLE5MM NUMBER OF MM VALVES TO ASSEMBLE * For a British pipe thread sub-base add BSPP (i.e. SBM-5-BSPP). Proportion-Air products are warranted to the original purchaser only against defects in material or workmanship for one (1) year from the date of manufacture. The extent of Proportion-Air's liability under this warranty is limited to repair or replacement of the defective unit at Proportion-Air's option. Proportion-Air shall have no liability under this warranty where improper installation or filtration occurred. All specifications are subject to change without notice. THIS WARRANTY IS GIVEN IN LIEU OF, AND BUYER HEREBY EXPRESSLY WAIVES, WARRANTIES OR LIABILITIES, EXPRESS, IMPLIED OR STATUTORY, INCLUDING WITHOUT LIMITATION ANY OBLIGA- TION OF PROPORTION-AIR WITH REGARD TO CONSEQUENTIAL DAMAGES, WARRANTIES OF MERCHANTABILITY, DESCRIP- TION, AND FITNESS FOR A PARTICULAR PURPOSE.... WARNING: Installation and use of this product should be under the supervision and control of properly qualified personnel in order to avoid the risk of injury or death. PROPORTION-AIR, INC. BOX 218 MCCORDSVILLE, IN USA PHONE (317) FAX: (317) web site: address: info@proportionair.com 8/8 INMPV1