MIL-PRF-5636E
3.5.1 Fittings. The oil inlet and outlet fittings shall conform to MS33786.
3.5.2 Interface dimensions and weight. The interface dimensions and weight shall be as
specified in the associated specification.
3.5.3 Locking threaded parts. Threaded parts shall be secured to prevent loss during operation.
Self-locking nuts, if used shall be in accordance with NASM33588. Staking or the use of
lockwashers shall not be permitted.
3.6 Performance.
3.6.1 Leakage. The valve shall not leak when subjected to an air pressure of 85 +15 psi.
3.6.2 Valve oil pressure drop. The oil pressure drop across the valve shall not exceed 12 psi for
both Type I and Type II valves at their maximum continuous oil flow capacity.
3.6.3 Temperature regulation. The valve shall incorporate a thermostatic device which, using a
bypass passage, controls the temperature of the oil at the valve outlet to the rated oil temperature
and tolerance specified in the associated specification. The thermostatic device shall have
temperature ratings for opening and closing as specified in the associated specification. The
thermostatic device shall not allow the pressure difference between the oil cooler inlet and outlet
to cause an internal pressure that exceeds the oil cooler proof pressure specified in the associated
specification.
3.6.3.1 Endurance of thermostatic device. The thermostatic device shall be capable of
withstanding 10,000 thermal cycles of opening and closing.
3.6.4 Pressure relief. The valve shall incorporate an oil pressure relief device for bypassing the
oil cooler when oil pressure in the oil cooler reaches the oil pressure drop value tolerance
specified in associated specification. When operating, the oil pressure drop shall not exceed the
maximum oil pressure drop specified in the associated specification.
3.6.5 Surge protection. The valve shall incorporate a surge protection device for bypassing the
oil cooler if subjected to an oil pressure at the oil cooler inlet that exceeds the oil cooler proof
pressure, or to an oil surge with:
a. viscous oil (10o +2oF).
b. pressure at the inlet of twice the oil cooler proof pressure.
c. hot oil (225o +2oF for petroleum base oil, 300o +10oF for synthetic base oil).
3.6.5.1 Endurance of surge device. The surge device shall withstand 100 cycles of oil pressure
surges of 400 +5 psi for a period of 15 seconds each.
3.6.6 Endurance of valve. The valve shall withstand 10,000 oil pressure cycles of opening and
closing in the horizontal and vertical position.
4
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business