DeZurik PMV P36C Podręcznik - Strona 16

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

Maintenance for Positioners

Lower Arm

After the front cover has been removed, the lower arm can be easily reached. See Figure 15.

1. Remove the indicator, feedback spring and the cam.

2. Loosen screw (2) and remove twist stop (1).

3. Remove screw (3), lower arm (4), rod (5) and spring (6).

4. Check rod and lower arm for wear, and replace if necessary.

5. Clean the rod and install it in the lower arm.

Note: The lower arm should move easily and smoothly.

6. Install the lower arm and rod assembly into the positioner housing, making sure the spring (6) is

attached properly to the lower arm and positioner housing.

7. Secure the lower arm and rod assembly with the screw (3).

8. Check again that the lower arm moves smoothly.

9. Apply a small amount of grease on the small tongue on the lower arm, then install and secure

the twist stop.

10. Install the cam, feedback spring, indicator and front cover.

O-Rings

With time and use, O-rings can become brittle. This can cause poor operation or failure. Always check

O-rings when performing work on the positioner, and replace any brittle O-rings.

Note: A thin layer of silicon grease applied on the O-rings prolongs their life.

D10327

(Continued)

Figure 15 – Lower Arm

Page 16

August 2012