D I S T R I B U T E D V A L V E S
02/2011 / IOM-WHE-CHECK-822
3
Installation, Operation and Maintenance Manual
DESCRIPTION
The Wheatley 822/820 swing check valve features a hinged stainless steel clapper with a lip type seal. The
design allows the clapper to swing freely from the closed position to the fully opened position and back.
The cover is threaded to the body and sealed with an O-ring. The cover Is equipped with 1/4” NPT bonnet
access port except sizes 1/2”, 3/4”, 1”. The swing check valve is a full bore type that will pass a sphere
with a nominal size not less that that specified in Table 1 of API 6D.
Due to the critical nature of pressurized piping systems it is recommended that the compatibility to the
service of the metallic and non-metallic components be confirmed prior to installation. This valve is not
recommended for slurry service.
!
CAUTION
READ CAREFULLY BEFORE INSTALLING OR OPERATING THE VALVE
Hazards are inherent with the construction, operation, and maintenance of high pressure piping
systems. The following information and precautions are provided to minimize these hazards:
1.
The valve’s nameplate indicates maximum operating pressure as well as minimum and
maximum operating temperatures. The valve may be safely operated within these limits.
2.
The valve’s end connections are available in threaded (NPT), socket weld, and
grooved configurations
3.
If the valve is equipped with socket weld ends, it is recommended that the valve be
disassembled prior to welding into the flow system. This will prevent damage to valve
seals due to heat from welding. Removal of cover pipe plug and clapper seal are not
required at disassembly. After welding, reassemble the valve according to the
Reassembly Instructions on page six.
4.
The valve has been factory pressure tested based on the nameplate maximum
operating pressure.
5.
These valves may be lifted with slings if required. Fittings and other devices, which may
be attached to the valve, are not intended to be used as lifting points. Always follow local
safety regulations when lifting heavy valves.
6.
WHEATLEY valves are designed, manufactured, and tested under a certified quality
system. Only quality parts and materials are used in the assembly of WHEATLEY valves.
Pressure containing components are suitable for the minimum temperature marked on
the nameplate. Factory certification is available.
7.
If the valve, in service, is exposed to hazards such as traffic, wind, or earthquake loading,
contact the factory, to confirm that the valve design is suitable for the
application. The factory requires a complete description of the hazard before making
any recommendations.
