DeZurik G-SERIES Manual - Halaman 4

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Halaman Cetak
DeZurik G-SERIES Manual
DeZURIK
LIFT, TURN AND RESEAT G-SERIES ACTUATORS USED ON
PTW & PFW TAPERED PLUG VALVES

Description

The Lift, Turn and Reseat G-Series Actuator is designed to operate PTW and PFW Tapered Plug
Valves.

Operation

To operate the actuator, follow these steps:
1. Turn the operator (handwheel or chainwheel) on the top of the actuator counterclockwise one
revolution. This lifts the plug off the seat.
2. Turn the operator (handwheel or chainwheel) on the side of the actuator to rotate the plug to the
desired position.
3. Turn the operator on the top of the unit clockwise one revolution. This reseats the plug in the
seat.

Tools Required

This actuator is assembled using only standard SAE fasteners. To service this unit, you should have a
full set of combination wrenches, Allen wrenches, several flat tipped screwdrivers and a dead blow
hammer.

Lubrication

Once a month, lubricate the fitting on the pointer using one of these lubricants:
•
Keystone Zeniplex-1 (recommended)
•
Amoco Amolith Grease #1-EP (alternate)
•
Amsoil GHD (alternate)
•
Mobil Mobilux EP 1 (alternate)
•
Petro-Canada Vultrex MPG EP 1 (alternate)
•
Shell Alvania EP 1 (alternate)
•
Texaco Multifak EP 1 (alternate)
This unit requires no additional lubrication unless disassembled. If disassembled, lubricant the
bearings, gear sector teeth and worm gear using one of the above lubricants.

Stops

Valves ordered for 360° plug rotation (Combination Number 0) are not furnished with stops.
Valves ordered for 90°, 180° or 270° plug rotation (Combination Numbers 1 thru 4) have stops to limit
valve travel in both the Clockwise and counterclockwise directions. These stops have been adjusted at
the factory to coincide with the Combination Number specified on the purchase order and do not
require adjustment unless the Combination Number is changed, or if the actuator has been
disassembled. See the STOP ADJUSTMENTS Section of this Instruction for details on adjusting the
stops.
May 2020
Page 4
D10189