DeZURIK
Willamette AWWA Metal Seated Ball Valve
January 2022
Page 6
D12001
Maintenance and Operation
All valves should be stored in the open position and should remain open until they are installed in the line. The
valve should only be opened or closed using the supplied actuator. Do not use any other manual or
mechanical means to open or close the valve.
If the ball does not rotate freely
– see troubleshooting
section.
When the valve is bolted into the line, the bolts should be retightened after the first week of service.
Periodically check tightness of the bolts connecting the operator support brackets to the valve body.
Operator
All bearings and moving parts are carefully lubricated during assembly and should give years of trouble-free
operation without further maintenance under normal service conditions.
Basic Valve and Torque Unit
The basic ball valve is equipped with water lubricated trunnion bearings and requires no maintenance. The
torque unit is lubricated at assembly and should give years of trouble-free operation under normal service
conditions.
Shaft Seal Replacement (Closed Position)
See figure 1 and table 1 for basic valve assembly component identification. See figure 2 and table 2 for
basic torque unit component identification.
The operating shaft of the valve is equipped with o-ring seals. The O-Rings may be replaced while the valve is
installed. The procedure for replacing rings with the valve in the closed position is as follows:
Servicing the valve while the pipeline is under pressure can cause personal injury or
equipment damage. Relieve pipeline pressure before servicing the valve.
1. Relieve the pressure in the pipeline and close the valve.
2. Drain oil, if any, from the torque unit housing (B02) and remove indicator (B11) and cover (B01).
3. Tighten the plug adjusting set screw (A16) by turning it ½ turn maximum, pushing the ball (A05) against
the thrust washers (A13). This accomplishes two things: it seals leakage and it locks the ball in position
4. Remove link pin (B19).
5. Run crosshead (B15) to top of stroke in order to get links (B14) out of the way.
Accidental operation of power actuator can cause personal injury or equipment
damage. Disconnect and lock out power to actuator before servicing.
6. If the actuator is powered, disconnect and lock out the pneumatic, hydraulic, or electrical power to
prevent accidental operation of the actuator.
7. Loosen clamp bolts (B24) in lever (B20) and remove lever (B20) from operating shaft (A06). Carefully
de-burr sharp edges of dowel pin hole in shaft (A06) and all other surfaces over which o-rings will pass
during disassembly and assembly.