DeZurik G16 지침 - 페이지 9

{카테고리_이름} DeZurik G16에 대한 지침을 온라인으로 검색하거나 PDF를 다운로드하세요. DeZurik G16 19 페이지. Cylinder operated actuator used on pec eccentric valves

Removing Actuator

When eccentric valves are mounted in a vertical pipeline, or mounted in a horizontal pipeline with the

plug stem horizontal, gravity can cause the plug to swing to a lower position in the valve body when the

actuator is removed. To avoid this problem, place the plug in the lowest position before removing the

actuator.

1. Discontinue flow, relieve pipeline pressure and close valve.

Accidental operation of power actuator can cause personal injury or equipment damage.

Disconnect and lock out power to actuator before servicing.

2. Disconnect and lock out the pneumatic power to prevent accidental operation of the actuator.

3. Scribe corresponding lines on the valve and actuator to help align them during installation.

4. If the valve is 4–20" (100–500mm), remove the lock nut, spring washers, wrenching nut and

pointer from the plug stud, then go to step 6.

5. If the valve is 24–36" (600–900mm), follow the steps below.

a. Loosen the #1 lockscrews about 6 to 8 turns. Loosen the #2 lockscrews about 3 turns. See

Figure 4

Figure 4 – 24-36" Valve Key and Lockscrew Arrangement

b. Using a soft hammer, tap the heads of the #1 lockscrews to loosen the keys.

c. Remove the four screws holding the wrenching nut to the gear sector, then remove

the stud locknut, spring washers and the wrenching nut with the keys attached.

Continue with step 6.

August 2012

Cylinder Operated G-Series Actuator

Page 9

DeZURIK

D10022