MIL-PRF-62198A(AT)
4.6.8 Proof pressure test. To determine conformance to 3.4.5, with valve in closed
position, a pressure of 4500 + 50 psig (31 + 0.35 MPa) shall be applied at a rate of 380 + 20 psig
(2.6 + 0.14 MPa) per second for a 3-minute period. Selector valve shall be observed to verify
absence of permanent deformation, rupture, or external leakage.
4.6.9 Burst pressure test. To determine conformance to 3.4.6 with valve enclosed
position, a pressure of 7500 + 50 psig (51.6 to 0.34 MPa) shall be applied at a rate of 380 + 20
psig (2.6 + 0.14 MPa) per second to the pressure port (port 1) for a 3-minute period. Selector
valve shall be observed to verify absence of permanent deformation, rupture, or external leakage.
The valve assembly is not expected to operate after this test.
4.6.10 Environmental testing. To determine conformance to 3.4.7, valve assembly shall
be subjected to tests specified in 4.6.10.1 through 4.6.10.4.
4.6.10.1 High temperature test. Selector valve assembly shall undergo procedure II,
operation method 501.3, MIL-STD-810. High temperature storage shall be 160 F (71 C) and
maintained for 36 hours. At the conclusion of the storage temperature test, the assembly shall be
stabilized at 125 F (51 C) and subjected to the 100 percent acceptance tests of table II. After
testing, return the valve assembly to normal ambient temperature (see 4.6.3) and verify
conformance to the 100 percent acceptance tests of table II.
4.6.10.2 Low temperature test. Selector valve assembly shall undergo procedure I,
storage method 502.3, MIL-STD-810. Low temperature storage shall be -65 F (-54 C) and
maintained for 12 hours. At the conclusion of storage temperature test, the assembly shall be
stabilized at -25 F (-31 C) and subjected to the 100 percent acceptance tests of table II. After
testing, return the valve assembly to normal ambient temperature (see 4.6.3) and verify
conformance to the 100 percent acceptance tests of table II.
4.6.10.3 Shock resistance test. To determine conformance to 3.4.7.3, selector valve
assembly shall be subjected to procedure I, functional shock method 516.4, MIL-STD-810.
Configuration of pulse shall be half sine wave of 40 + 4 g peak amplitude and 18 + 3 ms duration
measured at the 10 percent amplitude points.
4.6.10.4 Vibration resistance test. To determine conformance to 3.4.7.4, selector valve
assembly shall be subjected to category 8-ground mobile, method 514.4, MIL-STD-810 with the
following exceptions:
a. Vibration test profile shall be shown in figure 1 and conducted in 125 F (51 C)
ambient temperature. Time schedule for vibration resistance test shall total
80
minutes per axis, including 13.33 minutes dwell time at each resonance.
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