DeZurik P42 Instrução - Página 5

Procurar online ou descarregar pdf Instrução para Posicionadores de válvulas DeZurik P42. DeZurik P42 11 páginas. Pmv positioners

Maintenance

To ensure proper positioner operation, it is necessary to periodically clean the positioner valve body

and the restriction plug according to the following steps.

1. Close the valve..

Failure to close the valve may result in the valve slamming shut while the positioner is being

cleaned..

2. Disconnect supply air and instrument signal to the positioner.

3. Remove cylinder tubing from the positioner.

4. Remove the four positioner cover screws and the cover.

5. Remove the side frame from the positioner.

6. Make a note of the position of the indicator, then remove the indicator screw and the indicator.

7. Remove the three screws that hold the valve body to the positioner housing, and carefully lift out

the valve body.

8. Ensure the spool does not bind against the tip of the balance arm. See Figure 1 for parts

location.

9. Pull the spool out of the body and wash the components.

10. Dry the parts with compressed air, and ensure the ports are clear.

August 2012

Figure 1 – Component Identification

Page 5

DeZURIK

D10112