TM 5-3895-359-14&P
Standard Buna-N Seals and O-Rings
Optional Viton Seals and O-Rings
All standard Gresen products utilize Buna-N seals which
Viton seals are recommended for most applications that
are compatible with petroleum base, water-in-oil
use phosphate-ester type fluids. Viton seals will not
emulsions, and water-glycol fluids. Phosphate ester
swell when in contact with phosphate-ester type fluids.
type fire-resistant fluids will cause Buna-N seals to swell.
The temperature range for Viton seals is -20F to
This swelling is not normally detrimental to static seals,
+400F [-29C to +250C] in dynamic applications and -
but will be a problem for dynamic seals such as valve
40F to +400F [-40 to +250C] in static applications.
Viton seals are available for Gresen Models CP and CT
spool seals. Swelling of these seals can result in
valves.
binding spools. The temperature range of Buna-N seals
is -40F to + 225F [-40C to 107C].
Table 2. Cross Reference For Seal Kits, Buna-N to
Table 1. Cross Reference For Seals and O-Ring,
Viton
Buna-N to Viton
Buna-N
Viton
Application
Buna-N
Viton
Application
Kit No.
Kit No.
Part No.
Part No.
K-6001-A
None
K-6002-A
None
1129-001
None
K-6005-A
K-6041
RC Relief
1615-001
7447-001
Section Seal, Exhaust
K-6006-C
K-6042
WC Relief
1718-001
7446001
WC Relief, NR Plug
K-6017-A
K-6053-A
Power Beyond (1/2 NPTF)
1721-001
7612-001
Power Beyond Sleeve, Inner
K-6018-A
K-6054-A
Power Beyond (SAE 8)
1800-001
None
K-6019-A
K-6055-A
Power Beyond (SAE 10)
1818-001
7444-001
Inner Check Plug Seal
K-6021
K-6043
Anti-Cavitation Check
1819-001
7445-001
Outer Check Plug Seal
1853-001
7613-001
Quad Seal, Float
K-6027-A
K-6046
Section Seal, 3-Way, 4-Way
K-6028-B
K-6049
Section Seal, Float
2706-001
None
K-6030-A
K-6047
Check Plug
2707-001
7448-001
Check Plug Seal
K-6032
K-6041
Load Check, Anti-Cav. Check,
2709-001
6277-001
Power Beyond Sleeve, Outer
RC Relief
6806-001
None
K-6034-C
None
6814-001
7450-001
Section Seal, Pressure
6815-001
7451-001
Section Seal, Exhaust
K-6035-A
K-6048
Spool Seal
K-6039
None
7700-001
7449-001
Spool Seal
K-6040-C
None
7749-001
7614-001
Spool Seal, Float
3-49-49