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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 MS33514,
STYLE E, EXCEPT THAT THE
HOLE DIAMETER MAY BE
SMALLER THAN SPECIFIED
ON MS33514.
NOTES: 1. DIMENSIONS IN INCHES.
2. UNLESS OTHERWISE SPECIFIED,
TOLERANCES: DECIMALS ±0.015.
WEIGHT
±10%.
3. DIRECTION OF FLOW ARROWS 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
1.344
0.688
0.438
0.219
0.678
1.2
0.062
-5
0.312
0.500-20 UNF-3A
1.344
0.750
0.438
0.219
0.740
2.3
0.069
-6
0.375
0.562-18 UNF-3A
1.407
0.813
+0.003
0.469
0.250
0.803
3.5
0.092
-8
0.500
0.750-16 UNF-3A
1.624
1.000
-0.004
0.500
0.281
0.990
6.0
0.162
-10
0.625
0.875-14 UNF-3A
1.781
1.125
0.531
0.312
1.115
10.5
0.207
-12
0.750
1.062-12 UN-3A
1.938
1.375
0.562
0.343
1.365
16.0
0.312
±0.016
-16
1.000
1.312-12 UN-3A
2.438
1.625
1.060
0.375
1.615
29.0
0.512
Note :  Based on flow at 0°F.
FIGURE 2. Flareless tube check valve
12



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