Appendix D—Valve Assembly Details (HG600/THG600 Series)
Ref .
No .
Description
Cylinder Diameter
2 .75"
3 .25"
4"
5"
Part No .
Qty . per
Cylinder
Part No .
Qty . per
Cylinder
Part No .
Qty . per
Cylinder
Part No .
Qty . per
Cylinder
1.
Suction valve
assembly
b
3900-X
(steel)
2
4029-X2
(steel)
2
3807-X
(steel)
2
3856-5X (aluminum)
2
—
—
—
—
—
—
3856-5X2 (steel)
2
2.
Discharge valve
assembly
b
3901-X
(steel)
2
4030-X2
(steel)
2
3808-X
(steel)
2
3857-5X (aluminum)
2
—
—
—
—
—
—
3857-5X2 (steel)
2
3.
Valve seat
3940
4
—
—
3832
4
3856-4
4
4.
Stud
c
3828
4
—
—
3828
4
3920
4
5.
Valve plate
(inner)
a
—
—
—
—
3831
4
3872
4
6.
Valve plate (outer)
a
3941
4
—
—
3830
4
3871
4
7.
Valve bumper
3939
4
—
—
3826
4
3857
4
8.
Spring button
a
—
—
—
—
—
—
—
—
9.
Spring (inner)
a
3924
4
—
—
3829
4
3929
4
3829-1
(Inconel optional)
Spring (outer)
a
—
—
—
—
—
—
3928
4
10.
Repair kit
3804-X1
4
3124-X
(suction)
2
3805-X1
4
3146-X1
4
—
—
3125-X
(discharge)
2
—
—
—
—
11.
Blank (not shown)
d
3943
1
3767
1
3838
1
3768
1
a
These parts included in the repair kit.
b
Valve assembly also includes gaskets (not O-rings) as required for
installation. See valve holddown assembly details.
c
Direction of the stud MUST be as shown.
d
Use when blank valve option is required for reduced capacity.
e
Prior to serial number NN51400 used 3732-X for suction and 3733-X
for discharge.
2 .75" Valve
3 .25" Valve
Suction
3
Discharge
4
c
5
9
7
7
4
c
9
5
3
Suction
Discharge
3
6
5
9
7
7
9
5
6
3
WARNING
CAUTION: Always relieve pressure in the
unit before attempting any repairs.
56