DeZURIK
20.5 - 36" PEC Eccentric Valves
D10032
Page 6
April 2015
Closed Position
Because of the eccentric action of this valve, the closed position of the valve is dependent upon the
pressure drop expected when the valve is closed.
To adjust the valve closed position, follow these steps:
1. Relieve pipeline pressure.
Moving parts from accidental operation of power actuator can cause personal injury or
equipment damage. Disconnect and lock out power to actuator before servicing.
2. If the actuator is powered, disconnect and lock out the pneumatic, hydraulic, or electrical power
to prevent accidental operation of the actuator.
3. Back off the actuator closed position stop as described in the Actuator Instructions.
4. Close the valve with the torque specified in the Actuator Instructions.
Note:
This torque is the amount required to seat the plug for a given pressure drop across the valve. To
avoid excessive plug and seat wear caused by over torquing, use the actual pressure drop across the
valve when determining correct closing torque.
5. After the valve has been closed using the correct amount of torque, set the actuator closed
position stop to limit actuator travel at this position.
Lubrication
This valve does not require routine maintenance lubrication. If the valve is disassembled, lubricate the
packing and the plug journals as follows:
Packing
Packing lubrication requirements are dependent upon the packing material.
•
PTFE PACKING:
Requires no lubrication.
•
ALL PACKING OTHER THAN PTFE:
Apply a light coat to the inside and outside diameters of the packing rings using one of these
lubricants.
- Lubriplate Clearplex-2 (
recommended
)
- Amoco FG (alternate)
- Mobilgrease FM 101 (alternate)
- Petro-Canada Purity FG 2 (alternate)
- Phillips Philube PF (alternate)
Note:
Ensure lubricant is compatible with flow media.
