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|  MIL-T-21578A
Manual-fill connections - A fill pipe for manual filling of
3.4.3.1.10
reservoirs shall be located within the cabinet in an easily accessible location
for manual filling. The pipe shall be a minimum of 1-1/2 inch ID and shall
be equipped with a tank-fill connection (including a strainer and a sealed cap)
approved by the Underwriters Laboratory.
Strainer - A suitable strainer shall be provided between
3.4.3.1.11
the reservoir and low-pressure centrifugal boost-pump inlet which shall be
easily accessible for removal and cleaning.
3.4.3.1.12
Porting - The return port shall be located as remotely as
possible from the suction port and shall be designed in such a manner that the
return flow is directed away from the suction port. The return fluid shall be
introduced at least 1 inch below the minimum operating fluid level.
Reservoir gages - Liquid level gages shall be provided on
3.4.3.2
all reservoirs.
Types of reservoir gages - Hydrostatic or mechanical-
3.4,3.2.1
type gages shall be used. The gage shall indicate the liquid level in gallons or at
the 1/4, 1/2, 3/4, and full-level positions. The gage shall be properly marked
per-
to prevent overfilling of the reservoir and shall be accurate to within
cent. The gage shall be marked by a red line to indicate the minimum operating
level of the fluid in the reservoir.
3.4.3.2.2
Location of reservoir gages - Reservoir gages shall be
located in an accessible location and shall be readable from the pressurized-
fill-valve location.
3.4.3.3
Sump drain - Sump drains and working areas which collect
test fluid during test shall be equipped with an approved flame arrestor and shall
be piped to the outside of the test equipment. The drain line shall terminate with
a pipe coupling located a minimum of 16 inches above the floor. Sump drains shall
be a minimum of 4 feet in length, 18 inches in width, and not less than 26 inches
nor more than 30 inches above the floor.
3.4.3.3.1
Working area - Table-top working areas shall be pro-
vided at each end of the sump drain, a minimum of 18 inches in length by 18 inches
in width, and shall be a minimum of 30 inches and a maximum of 34 inches above
12
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