SIDE ENTRY 2P TRUNNION BALL VALVES API6D STANDARD - FS9000 SERIES
Australian Pipeline Valve - Installation, Operation and Maintenance Manual
15
If a gasket or seal is disturbed while removing or adjusting soft parts, APV
recommends installing a new gasket or seal. A proper seal is required to ensure
optimum operation.
6.5 SPRING
a- Remove and clean the springs part no. 24 with kerosene or similar solvent.
b- Fill with grease the spring holes on the seats.
c- Check the springs function properly.
d- Assemble the springs on the seats, be careful to avoid any damages to the seat gasket.
6.6 BEARINGS
a- The surfaces of the bearing shall not exhibit any signs of scratches or deep abrasion.
b- If necessary the bearing can be removed acting with the proper tool (screwdriver or chisel) between
bearing wall and ball.
c- The new bearing can be forced into the housing.
6.7 BALL
a- Clean the ball, check accurately the surfaces in contact with the seats and bearings.
b- Any damages of the surface must be eliminated by polishing with emery dust. Any deep scratch
crossing the whole sealing area shall be cause for rejection.
c- Lubricate accurately all the surfaces with a film of grease.
6.8 STEM SEAL AND STEM
a- Clean the stem surfaces and check in particular the portion in contact with gaskets.
b- The stem shall be free of abrasion, scaling or scratches.
c- Lubricate accurately with the grease.
d- Check seals and replace them if necessary.
6.9 BOLTS, NUTS AND THREADED COMPONENTS
a- All bolts, nuts, and threaded particulars shall be cleaned with kerosene, dried and lubricated with
protective oil. The body bolts should have a copper based anti-seize grease applied. To ensure grease
does not dry or wash out and does prevent corrosion protective plastic nut caps with grease nipples
are available.
b- The threads should be visually inspected to verify the integrity of the components.
