DeZurik PMV P36C Podręcznik - Strona 8

Przeglądaj online lub pobierz pdf Podręcznik dla Pozycjonery zaworów DeZurik PMV P36C. DeZurik PMV P36C 19 stron. For pneumatic actuators

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. Disconnect and lock out power to the actuator before servicing.

1. Shut off the supply air pressure and the input signal pressure.

2. On double-acting cylinders, disconnect and reverse the two connections to positioner ports C1

and C2. For spring-return cylinders, proceed to step 3.

3. Remove the positioner cover and dial indicator.

4. Loosen the cam locking nut screw and remove the cam locking nut.

5. Turn the cam over and position the cam so the cam roller is about 1/32" from the stop on the

cam. See Figure 4.

6. Tighten the locking screw — allow room for movement of the cam as the cam locking nut is

tightened.

7. Turn on the supply and input pressures and operate the valve.

8. Adjust the zero and span adjustments, if necessary.

D10327

Figure 4 – Cam Positions

Page 8

August 2012