CHECK VALVES - SWING, TILTING DISC & PISTON - API594/API6D/BS1868/B16.34
Australian Pipeline Valve - Installation, Operation and Maintenance Manual
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5 . 0 T R O U B L E S H O O T I N G
PROBLEM
PROBABLE CAUSE
REMEDY
Leakage at sealing surface
Dirt on the sealing surface
Clean the sealing surface
Sealing surface is damaged
Repair the sealing surface
Cannot operate normally
Dirt debris may be trapped between Hinge/
Swing Arm/Hinge Pin
Remove dirt or debris
Bonnet gasket leakage
Loosen flange bolt/nut
Re-torque the flange bolt/nut
Bonnet gasket failed
Replace with new gasket
Valve body and bonnet both damaged and
valve leaks
Corrosion over time. Wall thickness may be
below minimum required
Regularly check the wall thickness, replace
the valve ahead of time.
Disc will not operate normally
Hinge Pin may be deformed and jammed
Replace valve Hinge Pin
6 . 0 W A R R A N T Y A N D S E R V I C E
6.1 VALVE WARRANTY PERIOD
6.1.1
In the event the end user encounters an issue of quality, please notify APV immediately. APV reserves the
right to investigate and settle all issues of quality concerns directly with the end user. Refer to APV’s
standard warranty policy at the end of this I.O.M for questions or concerns regarding warranty.
6.1.2
Addressing a valve quality issue within the warranty period:
APV reserves the right to review and respond to all requests for warranty repair or replacement, prior to
making any replacement or repairs by the end user.
6.1.3
APV will not be held responsible for any damage due to natural disaster, such as earthquake, hurricane,
etc. during valve shipment.
6.1.4
APV must be consulted about any warranty issue before being held responsible for any repairs or valve
replacement.
