MIL-PRF-2765E
4.5.6.2 Volume change. The change in volume shall be determined after oil immersion, in accordance
with ASTM D 471.
4.5.7 Low temperature tests. Specimens for hardness after low temperature aging and the cold
compression set tests shall be conditioned in air or carbon dioxide for 94 ± 1/4 hours at minus 29 ± 1.1°C (minus
20 ± 2°F).
4.5.7.1 Hardness after low temperature aging. The hardness after low temperature aging shall be
determined in accordance with ASTM D 2240. The instantaneous reading shall be taken using a durometer, Type
A. Before use, the durometer shall be completely dry.
4.5.7.2 Cold compression set. Cold compression set shall be determined, before and after oil
immersion, in accordance with ASTM D 1229. The specimens shall be compressed to 40 percent deflection
during conditioning. In the case of oil immersed specimens, the deflection shall be based upon the un-swollen
thickness.
4.5.7.2.1 Oil-immersed specimens. Each specimen shall be immersed in 250 milliliters (mL) of oil as
specified in 4.5.6. After the oil immersion, the specimens shall be removed from the oil, carefully blotted, and
allowed to rest at room temperature for 30 minutes, before testing as specified in 4.5.7.2.
4.6 Off-gassing. The gasket material shall be tested in accordance with the Nuclear Powered Submarine
Atmosphere Control Manual, NAVSEA Technical Manual S9510-AB-ATM-010/(U), by a Government approved
testing facility. The results shall be submitted to the Government for evaluation and approval for use (see 3.7 and
6.4).
4.7 Toxicity. To determine conformance with the requirements of 3.8, gasket material shall be evaluated
using the HHA process. Sufficient data to permit a HHA of the product shall be provided by the
manufacturer/distributor to the NAVENVIRHLTHCEN. To obtain current technical information requirements
specified by the NAVENVIRHLTHCEN, see 6.5.
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 command. 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 synthetic rubber material covered by this specification is intended for use as
gaskets where resistance to oil is required. The lower temperature serviceability limit for this material is minus
20°F.
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