MIL-DTL-24402/2A
(4) Selector valve cover plate fasteners. A minimum of eight fasteners per MS20008H10 or better with
washers per MS14155-8 or better shall be used to secure the selector valve cover plate to the housing.
Cover plate fasteners shall be lockwired throughout in accordance with NASM33540. Fastener torque
values shall be as specified (see 6.2 of MIL-DTL-24402).
(5) Filter element size. The filter housings shall utilize Size B elements in accordance with SAE-J2321/2
as identified by PIN J2321/2-7-F.
b.
Maximum rated operating pressure. The filter assemblies shall have a maximum rated operating pressure
of 3,000 lb/inē.
c.
Rated flow capacity. The filter assemblies shall have a rated flow capacity of 100 gallons per minute.
d.
Performance.
(1) Bypass relief requirements. Type R assemblies shall have bypass relief valve settings as specified in
table II.
TABLE II. Bypass relief valve setting.
Leakage rate
Test fluid
(ounces/min [mL/min])
temperature
Test condition
Pressure (lb/inē)
(°F [°C])
MIL-PRF-17331
(a) Cracking pressure
(1) Qualification
150 minimum
104 (40)
0.34 (10) minimum
maximum
(2) Conformance
Not more than 5 lb/inē
68 to 140
0.34 (10) minimum
higher than the actual
(20 to 60)
cracking pressure for the
qualification assembly.
(b) Full flow
200 maximum
104 (40)
N/A
(qualification only)
maximum
(c) Reseat pressure
(1) Qualification
120 minimum
104 (40)
0.14 (4) maximum
minimum
(2) Conformance
120 minimum
68 to 140
0.14 (4) maximum
(20 to 60)
(2) Fatigue impulse rating. The filter assemblies shall have a fatigue impulse rating of 3,000 lb/inē in
accordance with NFPA T2.6.1.
(3) Proof pressure. The filter assemblies shall withstand a proof pressure of 4,500 lb/inē.
(4) Housing pressure drop. At the maximum rated flow with MIL-PRF-17331 fluid, the housing pressure
drop with minimum restriction dummy elements installed shall not exceed 35 lb/inē differential.
Selector valve may be positioned to allow flow through both filtration circuits to meet this
requirement.
3
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