6.3 SOFT SEAT INSERT (ONLY FOR VALVE WITH SOFT INSERT)
a- The soft insert shall be free of damages otherwise the seat shall be replaced.
WARNING: due to the specialised manufacturing process, the performance of the seat insert is
guaranteed only if manufactured by APV. Do not attempt to press in a new after market seat insert.
b- A non genuine or client made refurbished part will void the warranty.
6.4 SEALS
a- Clean and check the gasket’s status and repair/replace them if damaged.
6.5 SPRING
a- Remove and clean the spring part no. 08 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.
Australian Pipeline Valve - Installation, Operation and Maintenance Manual
14
SIDE ENTRY 3P TRUNNION BALL VALVES API6D STANDARD - BVF100 SERIES
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.
