2
1
9
See figure A
8
d
13
14
10
3
11
12
4
6
a
Appendix D—Valve Holddown Assembly Details (HG600/THG600 Series)
Ref .
No .
Description
Cylinder Diameter
5"
6"
8"
Part No .
Qty . per
Cylinder
Part No .
Qty . per
Cylinder
Part No .
Qty . per
Cylinder
1.
Bolt (hex head)
7001-043NC150A
16
7001-043NC150A
16
7001-043NC150A
16
2.
Valve cover plate
1764
4
1764
4
3675
4
3.
O-ring
2-235_
b
4
2-235_
b
4
2-242_
b
4
4.
Suction valve assembly
3856-5X (aluminum)
2
3856-2X (aluminum)
4
3710-X (aluminum)
4
Suction valve assembly
3856-5X2 (steel)
2
3856-2X2 (steel)
4
3710-X2 (steel)
4
5.
Discharge valve assembly
3857-5X (aluminum)
2
3857-2X (aluminum)
4
3709-X (aluminum)
4
Discharge valve assembly
3857-5X2 (steel)
2
3857-2X2 (steel)
4
3709-X2 (steel)
4
6.
Valve gasket
2114
a
4
2114
a
4
3691
a
4
7.
Valve cap
2714-1
d
4
2714-1
d
4
2714-1
d
4
8.
O-ring
2-031_
b
4
2-031_
b
4
2-031_
b
4
9.
Holddown screw
2715
4
2715
4
2715
4
10.
Valve cage
3570-1
4
3570-1
e
4
3676
4
11.
Actuator
3694
2
3694
2
3697
2
12.
Unloader spring
5324
2
3695
2
3695
2
13.
Unloader cap
2598-1
2
2598-1
2
2598-1
2
14.
Unloader assembly
3694-X2
2
3694-X
2
3697-X
2
15.
Bolt
1910
2
1910
2
1910
2
16.
Bal-seal
2619-X
4
2619-X
4
2619-X
4
17.
Unloader piston cap
2857
2
2857
2
2857
2
18.
Gasket
2858
2
2858
2
2858
2
19.
Unloader piston
5323
2
3696
2
2710
2
Suction Valve with Unloader
(3 .25", 4", 5", 6", & 8" only)
15
Important:
Note seal direction
Apply Loctite #290
when assembling
16
17
18
19
16
Unloader Piston Assembly
Details
Figure A
Material Code
A
Buna-N
B
Neoprene
®f
D
Viton
®f
E
PTFE
K
Kalrez
®f
55