MIL-DTL-24694A(SH)
4.6.8.2 Rapid warm-up and high temperature. The low temperature shall then be allowed to warm rapidly to a
temperature of 135 °C (275 °F). While the temperature is being raised and without waiting for the temperature to
stabilize throughout the setup, the pump shall be operated at the same rate as previously operated at room
temperature at temperature increments not to exceed 30 °C (86 °F). The pressure values obtained at these
temperature increments and at 135 °C (275 °F) shall not vary more than ±10 percent from those obtained during the
room temperature test. After maintaining the 135 °C (275 °F) temperature for at least 2 hours, the reseat test of
4.6.3.2 shall be conducted with MIL-PRF-83282 fluid at 135 °C (275 °F) with a flow of not less than 1 liter per
minute. The reseat pressure shall be not less than 90 percent of the minimum reseat pressure required by figure 1.
4.6.9 Burst pressure. Fluid pressure shall be applied to the inlet port with the outlet port blocked until the burst
pressure specified in 3.5.9 or the applicable specification sheet (see 3.1) is obtained. This pressure shall be applied
for a minimum of 2 minutes. At the end of this period, the valve shall be examined and any sign of external or
internal damage shall be cause for rejection.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or
order (see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor personnel, these
personnel need to contact the responsible packaging activity to ascertain packaging requirements. Packaging
requirements are maintained by the Inventory Control Point's packaging activities within the Military Service or
Defense Agency, or within the military service's system commands. Packaging data retrieval is available from the
managing Military Department's or Defense Agency's automated packaging files, CD-ROM products, or by
contacting the responsible packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.)
6.1 Intended use. The valves described in this specification are intended for use in hydraulic systems operating
at a maximum set pressure of 35 bars (500 lb/in² differential) and requiring a range of reseat and maximum
accumulation pressures as shown on figure 1. The valves have an operating temperature range of -29 to 135 °C
(-20 to 275 ºF) and are intended for use with section 3.3.4 hydraulic fluids. User of this valve should confirm if a
preferred orientation is necessary to obtain optimum performance within the intended application.
6.2 Acquisition requirements. Acquisition documents should specify the following:
a.
Title, number, and date of this specification.
b.
Title, number, and date of the applicable specification sheet.
c.
Applicable specification sheet part number.
d.
If drawings are required (see 3.8).
e.
Packaging requirements (see 5.1).
6.3 Qualification. With respect to products requiring qualification, awards will be made only for products
which are, at the time of award of contract, qualified for inclusion in Qualified Products List QPL No. 24694
whether or not such products have actually been so listed by that date. The attention of the contractors is called to
these requirements, and manufacturers are urged to arrange to have the products that they propose to offer to the
Federal Government tested for qualification in order that they may be eligible to be awarded contracts or orders for
the products covered by this specification. Information pertaining to qualification of products may be obtained from
Commander, Naval Sea Systems Command, ATTN: SEA 05S, 1333 Isaac Hull Avenue, SE, Stop 5160,
Washington Navy Yard DC 20376-5160 or emailed to CommandStandards@navy.mil. An online listing of
products qualified to this specification may be found in the Qualified Products Database (QPD) at
6.4 Subcontracted material and parts. The packaging requirements of the referenced documents listed in
section 2 do not apply when material and parts are acquired by the contractor for incorporation into the equipment
and lose their separate identity when the equipment is shipped.
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