DeZurik G-SERIES Instrução - Página 9

Procurar online ou descarregar pdf Instrução para Controlador DeZurik G-SERIES. DeZurik G-SERIES 19 páginas. Lift, turn and reseat used on ptw & pfw tapered plug valves
Também para DeZurik G-SERIES: Instrução (7 páginas), Manual (8 páginas), Manual (17 páginas), Manual (14 páginas), Manual (12 páginas), Manual (14 páginas), Manual (16 páginas), Manual (17 páginas), Manual de instruções (13 páginas), Manual (9 páginas)

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DeZurik G-SERIES Instrução

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