MIL-PRF-6164G
3.5.2 Nut. The valve shall be opened and closed by a nut located on and attached to the valve
body (see figure 1). With the valve installed in the boss, the nut shall be rotated clockwise (CW)
to close the valve and counter clockwise (CCW) to open the valve. The valve shall go from fully
closed to the fully opened position in 1 to 2 ¼ turns of the nut. The nut shall stop rotating in the
fully closed and opened positions.
3.5.3 Leakage. There shall be no leakage when the valve is subjected to its maximum rated
pressure (see 1.2).
3.5.4 Cycling.
3.5.4.1 M6164-2 through M6164-5. The valve shall withstand 100 cycles of opening and
closing to 55 +5 inch pounds torque at pressure to 5000 psi and temperature -65°F to + 275°F
(see 6.6).
3.5.4.2 M6164-12. The valve shall withstand 500 cycles of opening and closing to 55 +5 inch
pounds torque (see 6.6) at pressures to 8,000 psig and temperatures of -65o to 275oF.
3.5.5 Burst pressure. There shall be no evidence of failure or leakage when the valve is
pressurized to 2.5 times its maximum rated pressure.
3.5.6 M6164-3 and M6164-12 helium leakage. There shall be no leakage when the valve is
pressurized between 16 and 18 psig with helium.
3.5.7 Flow rate. The gas flow rate through the valve at its maximum rated pressure shall be a
minimum of 80 liters per minute (LPM).
3.5.8 Audible pressure warning feature. The valve shall have an audible pressure warning
feature which creates an audible warning when the valve body is loosened from the boss while
pressurized between 50 psig and the maximum rated pressure of the valve (see 6.7).
3.6 Item identification. The valves and fittings shall be marked with the following information
(see 6.2).
a.
Manufacturer s identification
b.
Manufacturer s CAGE code
c.
Manufacturer s part number (PN)
d.
Part or Identification Number (PIN) (see 6.10)
e.
Additional identification information if available (see 6.2)
3.7 Interchangeability. All parts having the same manufacturer s part number shall be
functionally and dimensionally interchangeable.
4. VERIFICATION
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