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MIL-PRF-25675 Valves, Check, Miniature, Hydraulic, Aircraft And MissileThis specification covers hydraulic, spring-loaded, normally closed aircraft and missile hydraulic system check valves with operating pressures up to 3,000 pounds per square inch \(psi\) and operating temperatures from -65 Deg. to 450 Deg. F.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13


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MIL-PRF-25675C
A REF
NOTE 3
D
B Hex
C
E DIA
THREAD T ENDS IN ACCORDANCE
WITH SAE AS4395, STYLE E, EXCEPT
THAT THE HOLE DIAMETER MAY BE
SMALLER THAN SPECIFIED ON
SAE AS4395.
NOTES: 1. DIMENSIONS IN INCHES
2. UNLESS OTHERWISE SPECIFIED,
TOLERANCES: DECIMALS ±0.015.
WEIGHT
±10%.
3. DIRECTION OF FLOW ARROW SHALL
BE ON ALTERNATING HEX FLATS.
Dash
Tube
Thread T
A
B Hex
C
D
E DIA
Rated
Weight
No.
outer
Flow gpm
(lb)
diameter
(Note)
-4
0.250
0.437-20 UNF-3A
1.538
0.688
0.438
0.219
0.678
1.2
0.070
-5
0.312
0.500-20 UNF-3A
1.538
0.750
0.438
0.219
0.740
2.3
0.078
-6
0.375
0.562-18 UNF-3A
1.581
0.813
+0.003
0.469
0.250
0.803
3.5
0.104
-8
0.500
0.750-16 UNF-3A
1.814
1.000
-0.004
0.500
0.281
0.990
6.0
0.183
-10
0.625
0.875-14 UNF-3A
2.047
1.125
0.531
0.312
1.115
10.5
0.234
-12
0.750
1.062-12 UN-3A
2.290
1.375
0.562
0.343
1.365
16.0
0.352
±0.016
-16
1.000
1.312-12 UN-3A
2.884
1.625
1.062
0.375
1.615
29.0
0.580
Note :  Based on flow at 0°F.
FIGURE 1. Flared tube check valve
11



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