2 PIECE BODY BALL VALVES - FS660 SERIES
Australian Pipeline Valve - Installation, Operation and Maintenance Manual
13
4.3 TROUBLESHOOTING
MALFUNCTION
POSSIBLE CAUSE
REDIAL ACTION
Valve does not rotate or operate 1. Packing is dropped too tightly.
2. The stem is damaged or there is dirt.
3. The times or on-off operation are too many or debris
exists on the surface of the ball.
1. Loosen packing and adjust again.
2. Pull apart the valve and clean the dirt.
Ball/Seat Leaking
1. Valve not fully closed.
2. Seat or ball damaged.
3. Debris trapped in valve.
1. Close the valve tightly.
2. Replace seat or ball.
3. Clean the debris.
Stem Packing Leaking
1. Packing gland nut loose.
2. Packing damaged or missing.
3. Seal misaligned.
1. Tighten gland nut.
2. Replace packing (shut down fi rst).
3. Replace and align it correctly.
Body Gasket Leaking
1. Body joint.
2. Body gasket damaged.
1. Tighten body nut.
2. Replace the gasket.
Note
Nylon and Devlon are hard and more scratch resistant compared to Teflon®, and
PEEK is harder still. However, Teflon® is more resilient and has better ‘memory’ in
terms of resistance to permanent indentations. All soft seated valves are only suited
to clean service applications.
