MIL-S-27661C
3.6.1
Environmental conditions. The strainer shall be capable of operating
under and withstanding the following environmental conditions:
3,6.1.1
Temperature ranges.
3.6.1.1.1
Operating temperatures.
The strainer shall not be damaged by
storage in ambient temperature from 80 to
Fahrenheit for not less than
50 hours.
3.6.1.2 Humidity.
The strainer shall not be damaged by operation or
storage in any relative humidity up to and including 100 percent, including
conditions wherein condensation takes place in the form of water or frost.
3.6.1.3 Fungus.
The strainer shall not be damaged by exposure to moist
fungus growth such as encountered in tropical and subtropical climates.
3.6.1.4 Sand and dust. The strainer shall not be damaged by operation or
storage in an atmosphere containing airborne sand and dust particles such as
encountered in normal and desert operations.
The strainer shall not be damaged by operation or
3.6,1.5 Salt atmosphere.
storage in an atmosphere containing salt-laden moisture as encountered neat
bodies of salt water and in transportation on shipboard.
3.6.2 Pressure loss.
When flowing 0.780 specific gravity fuel at 600 gpm.
the pressure loss shall not exceed 4 pounds per square inch.
3.7
Details of components.
The housing assembly shall be constructed of alum-
3.7.1
Housing assembly.
inum-alloy material.
The inlet and outlet pipe connections shall be in line
(same horizontal and verticle planes).
The housing assembly shall have either
a flange or a coupling groove for attachment of the housing head,
Housing
assembly and flange, if used, shall be designed in accordance with the ASME
Unfired Pressure Vessel Code, design pressure shall be 235 pounds per square
inch gage,
If a coupling groove is used, the connection neck shall be either
forged or cast aluminum alloy, and the groove shall conform to Figure 2 dimen-
sions of MIL-C-10387.
The screen assembly shall be both installable and
removable from the head assembly after the housing head has been removed. A
Location of the drain plug shall be as
0.50 inch drain plug shall be provided.
specified (see 6.2).
Location of the drain plug will be determined according
to the installed attitude of the sediment strainer so as to assure that the
drain plug is positioned at the lowest point with respect to the ground plane.
3.7.1.1
Piping connections. Housing assembly piping connections shall be
either type I or type II as specified (see 6.2).
Type I piping connections are
intended for Air Force procurements; type II connections are intended for Navy
applications.
3.7.1.1.1 Type I.
Type I piping connections, inlet and outlet, shall be
grooved in accordance with the nominal 4 inch pipe size dimensions of figure 2
of MIL-C-10387.
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