Hayward Ball Valve TBH1125AOSV0000

3.3 Replacing Internal Seats and Seals

Ensure safety precautions are followed

Depressurize and drain system with valve handle in partially open position (45°)

Remove assembly nuts from valve body by rotating counterclockwise

Rotate handle to fully closed position

Remove seal retainer from body by rotating counter-clockwise

Ensure the system is depressurized and drained before starting maintenance

Inspect valve for external damage

Check true union nuts and/or flange connections

Are flange bolts tight enough to compress the gasket and make a good seal without distorting or putting excessive stress on the flanges?

Ensure suitable washers are used

Tighten bolts in alternating sequence (refer to Figure 1)

Refer to Table 1 for recommended torque and note any deviations

Operate valve to 45° (i.e. ½ open) position

Slowly purge air from system as line fills with liquid

Check for leaks around valve handle, stem, and end connections

Check for proper valve operation

If any leaks are present, or valve does not perform properly, refer to troubleshooting guide

Depressurize and drain system prior to performing any maintenance

System must be depressurized and drained prior to installing valve or performing maintenance. Failure to depressurize and drain system prior to installing or maintaining valve may result in product damage, property damage, personal injury, or even death.

3.2 Replacing End Connector O-Rings

Ensure safety precautions are followed

Depressurize and drain system with valve handle in partially open position (i.e. handle at 45° position)

Remove assembly nuts from valve body by rotating counterclockwise

Using a plastic pick, carefully remove the old seals

Clean o-ring grooves with a soft brush or cloth

Install new o-rings by gently pressing o-ring into groove until o-ring is fully seated

Install valve cartridge between end connectors, match nuts to body threads and turn nut clockwise to thread onto body