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DeZurik PMV P36C Manual

For pneumatic actuators
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PMV P36C AND P41C
POSITIONERS
USED WITH DeZURIK PNEUMATIC
ACTUATORS
D10327
Instruction
August 2012

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Summary of Contents for DeZurik PMV P36C

  • Page 1 PMV P36C AND P41C POSITIONERS USED WITH DeZURIK PNEUMATIC ACTUATORS D10327 Instruction August 2012...
  • Page 2 Parts Order parts from your local DeZURIK sales representative, or directly from DeZURIK. When ordering parts, please include the 7-digit part number and 4-digit revision number (example: 9999999R000) located on the data plate attached to the valve assembly. Also include the part name, the assembly drawing number, the balloon number and the quantity stated on the assembly drawing.

  • Page 3: Table Of Contents

    DeZURIK PMV P36C and P41C Positioners used with DeZURIK Pneumatic Actuators Table of Contents Technical Specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -...

  • Page 4: Technical Specifications

    DeZURIK PMV P36C and P41C Positioners used with DeZURIK Pneumatic Actuators Technical Specifications Model P36C Both Models Model P41C Input signal 20–100 kPa 3–15 psi 4–20mA Linearity =<0,5% =<0,75% Hysterisis =<1% =<0,75% Repeatability =<0,5% =<0,5% 1000 (kPa/kPa) Gain factor at 80% load.

  • Page 5: Description

    DeZURIK Pneumatic Actuators Description The positioner is a precision instrument which, when used in conjunction with a DeZURIK actuator, can provide the exacting control necessary to satisfy the most demanding process requirements. The model P36C will accept a 3-15psi, 3-9psi, or 9-15 psi input signal.

  • Page 6: Cam Selection

    Air Connections Air connections are for 1/4" NPT male connectors and are marked on the positioner. Gauge ports are for 1/8" NPT. DeZURIK recommends Loctite® 577 tape or similar for sealing. Port I Input instrument pneumatic signal 3-15 psi (20-100kPa)

  • Page 7: I/P Unit Electrical Connections

    DeZURIK PMV P36C and P41C Positioners used with DeZURIK Pneumatic Actuators Installation (Continued) The outlet port is used for venting the positioner. All air from the positioner, actuator and I/P unit is vented to atmosphere through this port. Do not plug this port. A high flow silencer or an exhaust pipe can be connected to the outlet port to prevent foreign objects from entering and blocking the exhaust.

  • Page 8: Reversing The Positioner Action

    DeZURIK PMV P36C and P41C Positioners used with DeZURIK Pneumatic Actuators Reversing the Positioner Action To change the positioner action from increasing signal to OPEN to increasing signal to CLOSE, or vice versa, follow the steps below. Moving parts from accidental operation of power actuator can cause personal injury or equipment damage.

  • Page 9: Cam Adjustment

    DeZURIK PMV P36C and P41C Positioners used with DeZURIK Pneumatic Actuators Cam Adjustment Figure 5 – Cam Adjustment 1. With the cover and indicator removed, loosen the screw (1) and turn the cam locking nut (2) counterclockwise until the cam loosens. See Figure 5.

  • Page 10: Resetting The Range Spring

    DeZURIK PMV P36C and P41C Positioners used with DeZURIK Pneumatic Actuators Resetting the Range Spring If the correct span cannot be obtained after 2 or 3 zero/span adjustments, reset the range spring as follows: 1. Disconnect air supply and remove the range spring from the positioner.

  • Page 11: I/P Electric Control Unit, P41C The I/P Unit

    DeZURIK PMV P36C and P41C Positioners used with DeZURIK Pneumatic Actuators I/P Electric Control Unit, P41C The I/P Unit The I/P unit is mounted directly on top of the positioner. Span and Zero for the I/P converter are factory set. No external air supply is needed, as the I/P unit is supplied with air from the positioner. The I/P unit accepts a 4–20 mA input signal.

  • Page 12: Installing I/P Unit On Positioner

    DeZURIK PMV P36C and P41C Positioners used with DeZURIK Pneumatic Actuators Installing I/P Unit On Positioner Positioners installed in hazardous areas can be ignition sources. Ensure positioners used in hazardous areas have proper fire/explosion ratings. 1. Turn off the supply air and remove the connecting block (1), gauge or plug from port IP, and the existing gasket (4) between the positioner (2) and connecting block.
  • Page 13 DeZURIK PMV P36C and P41C Positioners used with DeZURIK Pneumatic Actuators Installing I/P Unit On Positioner (Continued) 6. Install the I/P unit on the top of the positioner, making sure the four O-rings are in the correct places. See Figure 10b.

  • Page 14: Maintenance For Positioners

    DeZURIK PMV P36C and P41C Positioners used with DeZURIK Pneumatic Actuators Maintenance for Positioners Pilot Valve To remove the pilot valve for cleaning: 1. Remove the screw (1) and carefully lift out the complete assembly (2). 2. Gently remove the spool (3) from the block.

  • Page 15: Feedback Spring

    DeZURIK PMV P36C and P41C Positioners used with DeZURIK Pneumatic Actuators Maintenance for Positioners (Continued) Feedback Spring Once the front cover and indicator are removed, the feedback spring can be easily reached. See Figure 1. Hold the spring (1) from the top, pull down and out.

  • Page 16: O-Ring

    DeZURIK PMV P36C and P41C Positioners used with DeZURIK Pneumatic Actuators Maintenance for Positioners (Continued) Lower Arm After the front cover has been removed, the lower arm can be easily reached. See Figure 15. Figure 15 – Lower Arm 1. Remove the indicator, feedback spring and the cam.

  • Page 17: Troubleshooting

    DeZURIK PMV P36C and P41C Positioners used with DeZURIK Pneumatic Actuators Troubleshooting Condition Possible Cause Corrective Action Indicator is loose. Check indicator and screw. Re-position indicator and tighten. Air supply is not adequate. Check air supply to positioner, and tubing to actuator.
  • Page 18 DeZURIK PMV P36C and P41C Positioners used with DeZURIK Pneumatic Actuators Figure 16 – Positioner Configurations D10327 Page 18 August 2012...

  • Page 19: Parts

    DeZURIK PMV P36C and P41C Positioners used with DeZURIK Pneumatic Actuators Parts Table A: Parts - Positioner Table A: Parts – Positioner, continued Part No. Description Part No. Description Housing Plug Front cover with O-ring Connecting block 38–45 Screw set Relief valve spring 46–53...

This manual is also suitable for:

Pmv p41c

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