2
3
a
3
a
4
5
1
6
7
2
7
4
5
6
8
2
3
4
5
6
7
8
9
8
7
6
5
4
3
2
9
1
10
Valve Assemblies—Second Stage
Valve Assemblies—First Stage
Appendix E—Valve Assembly Details for Model WFD551
Ref
No.
Part No.
Description
Qty.
1.
5311-3X2
Suction valve assembly
2
2.
5311
Valve seat
4
3.
3920
a
Valve stud
4
4.
5312
Valve plate
4
5.
5313
Valve spring
4
6.
5318-3
Valve bumper
4
7.
1418-2
Valve gasket (iron-lead standard)
4
1418-1
Valve gasket (copper optional)
4
1418
Valve gasket (aluminum optional)
4
8.
5318-3X2
Discharge valve assembly
2
Ref
No.
Part No.
Description
Qty.
1.
3856-3X2
Suction valve assembly
2
2.
3856
Valve seat
4
3.
3920
a
Valve stud
4
4.
4230
Inner valve plate
4
5.
4229
Outer valve plate
4
6.
3951
Inner valve spring
4
7.
3993
Outer valve spring
4
8.
3857-1
Valve bumper
4
9.
2114-2
Valve gasket (iron-lead standard)
4
2114-1
Valve gasket (copper optional)
4
2114
Valve gasket (aluminum optional)
4
10.
3857-2X2
Discharge valve assembly
2
Valve Assembly Bill of Materials
Valve Assembly Bill of Materials
Apply Loctite #263.
WARNING
Always relieve pressure in the unit before attempting
any repairs.
Suction Valve
Suction Valve
Discharge Valve
Discharge Valve
30