Corken 91 - Model D891 and FD891

1
2
3
2
3
4
5
6
7
14
8
9
14
D891
cover
plate
FD891
cover
plate
8
10
11
13
5
6
7
14
8
9
14
D891
cover
plate
FD891
cover
plate
8
10
11
13
15
16
17
18
22
19
20
21
Suction Valve
Spec 4
Discharge Valve
All Specs
21
16
19
20
22
17
18
15
Valve Assemblies (4-1/2")
891 Head Valve Holddown
Assembly (4-1/2")
Valve Holddown
Assembly (4-1/2")
DischargeSuction
Appendix E—Parts Details for D891 and FD891 Head and Valve Assembly
WARNING
CAUTION: Always relieve pressure in the
unit before attempting any repairs.
Head and Valve Bill of Materials
Ref
No.
Part No. Description Qty.
1. 3923 Cylinder cap 1
2. 3924 Cylinder head (4-1/2") 2
3. 2-246__
a
O-ring 2
4. 7001-050 NC175A
Bolt (hex head, 1/2"–13 x 1-3/4",
grade 5, torque to 65 ft•lbs)
12
5. 2714-1 Valve cap 8
6. 2-031__
a
O-ring 8
7. 2715 Holddown screw 8
8.
1764 Valve cover plate (model D891) 8
4854 Valve cover plate (model FD891) 4
9. 2-235__
a
O-ring 8
10. 3570 -1 Valve cage 8
11. 3856-2X Valve assembly (4-1/2", suction) 4
12. 3857-2X Valve assembly (4-1/2", discharge) 4
13. 2114
b
Valve gasket 8
14. 7001-043 NC150A
Bolt (hex head, 7/16"–14 x 1-1/2",
torque to 37 ft•lbs)—model FD891
28
Bolt (hex head, 7/16"–14 x 1-1/2",
torque to 37 ft•lbs)—model D891
32
15. 3856 Valve seat (4-1/2") 8
16. 3920 Stud 8
17. 4230
c
Valve plate (inner) 8
18. 4229
c
Valve plate (outer) 8
19. 3929
c
Inner spring 2
20. 3928
c
Outer spring 2
21. 3857-1 Valve bumper (4-1/2") 8
22. 3146-X2 Valve repair kit 1
a
_ denotes material code. See material code chart
for details.
b
Included with valve assembly.
c
Included with valve repair kit.
d
Registered trademark of the DuPont company.
Material Code
A Buna-N
B Neoprene
®d
Model D891 and FD891
90