DeZurik PMV P36C Manuel - Page 15

Parcourez en ligne ou téléchargez le pdf Manuel pour {nom_de_la_catégorie} DeZurik PMV P36C. DeZurik PMV P36C 19 pages. For pneumatic actuators

Maintenance for Positioners

Feedback Spring

Once the front cover and indicator are removed, the feedback spring can be easily reached. See Figure

13.

1. Hold the spring (1) from the top, pull down and

out.

2. When installing, hold the assembly at the top,

guide the lower part to position on the zero

screw, then press down until it fits easily under

the balance arm (2).

3. Ensure the assembly is aligned properly against

the balance arm.

Balance Arm

The balance arm can only be removed after I/P unit, diaphragm and feedback spring have been

removed. See Figure 14.

Refer to "Diaphragm" and "Feedback" sections above.

1. Loosen the screws (3) and remove the balance

arm.

2. When installing the balance arm make sure the

leafspring (4) on the underside of the balance

arm (5) is properly engaged in the groove (6) of

the spool in the pilot valve.

3. Tighten the two screws (3) holding the balance

arm to the positioner.

August 2012

PMV P36C and P41C Positioners

used with DeZURIK Pneumatic Actuators

(Continued)

Page 15

Figure 13 – Feedback Spring Access

Figure 14 – Balance Arm Access

DeZURIK

D10327