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4 Valve Description
73 of 100
Table 86: Parts list
Part No.
Description
Class
Material
A 105
Trim 8
A 182 F11
Trim 5
A 182 F22
Trim 5
A 182 F304
Trim 2
A 182 F316
Trim 10
A 182 F91
Trim 5
100
Body
A 105
A 182 F11
A 182 F22
A 182 F304
A 182 F316
A 182 F91
160
Cover
A 105
A 182 F11
A 182 F22
A 182 F304
A 182 F316
A 182 F91
210
Hinge pin
A 276-304
A 276-304
A 276-304
A 276-304
A 276-316
A 276-304
746
Valve disc
800
A 182 F6a
A 182 F6a + STL6 A 182 F6a + STL6 A 182 F304
A 182 F316
1500/2500
A 276-410/
A 276-410+ST6
A 276-410/
A 276-410+ST6
A 276-410/
A 276-410+ST6
A 276-304/
A 276-304+ST6
A 276-316/
A 276-316+ST6
A 276-410/
A 276-410+ST6
411
Joint ring
800
304 + graphite
304 + graphite
304 + graphite
304 + graphite
316 + graphite
515
Seat ring
800
A 182 F6a + STL6 A 182 F6a + STL6 A 182 F6a + STL6 A 182 F304
A 182 F316
1500/2500
A 276-410/
A 276-410+ST6
A 276-410/
A 276-410+ST6
A 276-410/
A 276-410+ST6
A 276-304/
A 276-304+ST6
A 276-316/
A 276-316+ST6
A 276-410/
A 276-410+ST6
570
Hanger arm
A 351 CF8
A 351 CF8
A 351 CF8
A 351 CF8
A 351 CF8M
A 351 CF8
901
Bolt
800
A 193 B7
A 193 B16
A 193 B16
A 193 B8
A 193 B8M
920
Nut
800
A 194 8
A 194 8
A 194 8
A 194 8
A 194 8M
1500/2500
A 276-304
A 276-304
A 276-304
A 276-304
A 276-316
A 276-304
4.7.3.6 Function
The main components of the swing check valves are the body (100), the cover (160)
and the valve disc (746).
Seat/disc interface
The integral seating surfaces in the body are hard-faced. The valve disc (746) is
mounted on the hanger arm (570) by means of a nut (920). The hanger arm (570)
pivots on a hinge pin (210) mounted inside the body (100).
Bonnet/cover seal
On Class 800 valves, the cover (160) is bolted to the body (100). The joint is sealed by
a joint ring (411). On Class 1500 and Class 2500 valves, the cover (160) is screwed into
the body (100) and the joint is seal-welded.