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コントローラー DeZurik POWERRAC R1のPDF 取扱説明書をオンラインで閲覧またはダウンロードできます。DeZurik POWERRAC R1 20 ページ。 Spring-return actuator used on 1/2-3" pec eccentric valves

Troubleshooting

Condition

Actuator closes to wrong position

Actuator opens to wrong position

Actuator will not fully operate

valve

Valve fails in wrong direction with

spring-return actuator

November 2020

Possible Cause

Closed position stop is set

incorrectly

Open position stop is set

incorrectly

Cylinder pressure is low

Actuator is sized

incorrectly

Piston seal in cylinder is

leaking

Pipeline obstruction is

preventing closure

Lockable Model is locked

Actuator is assembled

incorrectly

Page 19

DeZURIK

Corrective Action

Adjust closed position stop.

See Position Stops section.

Adjust open position stop.

See Position Stops section.

Increase cylinder pressure. Do not

exceed 100 psi

Use larger actuator

Replace piston seal(s)

Remove obstruction

Place in unlocked condition.

See Lockable Model section

Exchange locations of spring-return

and double-acting cylinders

D10389