MIL-DTL-24695C(SH)
3.4.1.3 Cap design. A knurled valve cap shall be attached to the valve for installation when the hose assembly
is not connected. The cap shall be equipped with a male connection to mate with the probe seal in the valve. This
male connection shall not be long enough to actuate the valve. This male connection and the probe seal shall form a
3.4.2 Hose assemblies. Hose assemblies shall be constructed as specified herein and in the applicable
specification sheet. The hose assembly shall have a probe which is integral to the reverse buttress thread end fitting.
An O-ring seal, located within the vent and test valve, shall seal against the probe (see 3.4.1). Dimensions shall
conform to the applicable specification sheet. The probe shall be used to depress the check valve ball or poppet,
opening the flow passage. The minimum hose internal diameter shall be not less than 1.0 millimeter (0.039 inch).
3.4.3 Adapters. Adapters shall be constructed as specified herein and in the applicable specification sheet.
Dimensions shall conform to the applicable specification sheet. Adapters shall be equipped with a locking elastomer
ring to dampen shock and vibration that may loosen the adapter. The adapter shall be sized to mate with the vent
valve hose fitting (see MIL-DTL-24695/2 for detail of vent and test valve hose assembly end fitting).
3.5 Performance. Vent and test valves, hose assemblies, and adapters shall perform as follows (see 4.2).
3.5.1 Vent and test valves.
3.5.1.1 Proof pressure. The valve shall withstand a proof pressure of 465 bars (6,750 lb/in2) without signs of
external leakage, failure, or permanent set (see 4.2.3.2). The valve cap shall withstand a proof pressure of 465 bars
3.5.1.2 Shock. The valve shall meet the shock requirements as specified in MIL-S-901 for Grade A, Class I
equipment (see 4.2.3.3).
3.5.1.3 Leakage. Leakage shall be limited to those criteria specified in the leakage tests with the valve
3.5.1.4 Operation. The torque required to couple the hose assembly to the valve under the maximum operating
pressure of 310 bars (4,500 lb/in2) shall not exceed 2.0 Newton meters (18 inch-pounds) (see 4.2.3.6).
3.5.1.5 Endurance. The valves shall withstand 250 open/shut cycles or seating/unseating of the valve s internal
check or poppet by the hose assembly probe or equivalent substitute at an operating pressure of 310 bars
(4,500 lb/in2) at room temperature without evidence of external leakage to exceed one drop during a 2-hour period
following valve cycling (see 4.2.3.6).
3.5.1.6 Vibration. The valves shall operate as specified herein after being subjected to vibration tests in
accordance with MIL-STD-167-1 (see 4.2.3.7). Presence of any of the following conditions resulting from vibration
shall be cause for rejection:
a.
Damage to parts.
b.
Loosening of parts (including cap).
c.
Leakage of one drop or more from the uncapped valve.
d.
Loosening (unscrewing) of the valve when the cap is removed.
3.5.1.7 Burst pressure. The valve shall withstand a burst pressure of 620 bars (9,000 lb/in2) without any sign of
rupture or permanent deformation (see 4.2.3.8).
3.5.1.8 Valve flow rate. The vent and test valve, when connected to the hose assembly and adapter, shall pass a
minimum of 250 milliliters (15.3 in3) per minute at a pressure differential of 10 bars (145 lb/in2) (see 4.2.3.9).
3.5.2 Hose assembly.
3.5.2.1 Proof pressure. The hose assembly shall withstand a proof pressure of 620 bars (9,000 lb/in2)
(see 4.2.4.2).
4
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business