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2. Maintenance
2.1 Valve disassembly
To disassemble a ball valve:
1. For a manual valve, remove the top handle nut (20) from the stem (4). Remove the handle (7).
For actuated valves remove bracket mounting bolts and remove actuator/bracket and coupler.
Note:
If you are disassembling a 3 or 4 inch valve, you’ll need to remove the actuator mounting bolts.
2. To remove the second stem nut you must first bend back the side tab of the stop washer (12). This can be done using a
screw driver or punch.
Once the stop washer side tab is flattened you can remove the stem nut (5).
Note:
3 and 4 inch valves will require a socket wrench to reach the nut recessed into the mounting bracket. 36mm.
3. Remove bevel washers (6) and gland bushing (9).
4. Remove four hex nuts (17) from one side of body bolts (14). For the 4 inch valve remove six hex nuts (17). Remove body
bolts/studs to allow bodyends (2) to fall away.
5. Remove the front and rear ball seats (8).
6. Turn the stem (4) clockwise until the ball (3) is in the closed position, allowing the ball to fall free from the valve.
7 Press downward on the stem (4) until it presses through the inside of the valve body (1), and remove the stem and
bottom stem seal (11) and the stem packings (10).
8. Remove the joint gasket (5) from valve body ends. (You will need to use a small instrument, such as a dental pick or
small screw driver to pry the o-ring away from the body end. Be careful not to mar the body end in the process.)
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