
DeZURIK
3---36" PEF 100% Port Eccentric Plug Valves
April 2015
Page 9
D10453
Actuator Stop Adjustments
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:
This valve is a pressure vessel. The bonnet will blow off the valve if the bonnet
bolts are removed with pressure in the valve and pipeline media can be hazardous.
Completely release pressure before disassembling the valve.
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, except for special application. 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 P
ACKING
: Requires no lubrication.
•
A
LL
P
ACKING
O
THER 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.