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|  MIL-T-21578A
the floor, Test equipment constructed in more than one section shall have
individual working areas integral with each section. The working area and
sump drain combination shall be so designed and located to facilitate installat-
ion, removal, and visuaI inspection of accessories undergoing test.
Waste reservoir - The waste reservoir shall not be part
3.4.3.3.2
of the test equipment. When a waste reservoir is required it shall be located
within the enclosure, shall have a minimum of 5 gallons capacity, and shall be
located directly below the sump and above the waste reservoir outlet on the
rear of the panel. The waste reservoir outlet shall be located a minimum of
16 inches above the floor.
3.4.3.4.
Filter assemblies - All filters assemblies shall be of a
size and type specified in the detail specification. The filter assembly shall
be capable of handling flows at least 100 percent in excess of the maximum rated
flow capacity of the test equipment without exceeding the specified allowable
pressure drop.
3.4.3.4.1
Filter assembly location - The filters shall be located,
when practicable, above the level of the fluid in the main supply reservoir and
shall be readily accessible for servicing, Filters shall not be installed in
the boost-pump inlet nor submerged in the supply reservoir.
3.4.3.4.2
Air bleed (filter assembly) - Filter assemblies shall be self
purging, or provided with a l/8-inch valve connected to tubing to divert the purged
fluid directly to the main reservoir.
3.4.3.4.3
Filter element replacement indicator - Red indicator lights
shall be mounted on the test equipment panel to indicate when filter elements
require replacement. A separate indicator light shall be used for each filter
assembly. The light(s) shall indicate at the differential pressure specified in
the detail specification.
3.4.3.5
Plumbing - All lines, valves, and fittings shall be designed-
of sufficient size to allow operation under maximum flow conditions without ex-
periencing excessive pressure drop throughout the system. Fluid velocities in
pressure lines and valves shall not exceed 15 feet per second, Fluid velocities
in return and suction lines shall not exceed 5 feet per second.
3.4.3.5.1
Fluid lines and fittings - Flexible hoses, and fittings in
accordance with MIL-F-5509 or MIL-F-18280 shall be used whenever possible.
The use of hose clamps as fluid line couplings shall be prohibited. All valves,
and fittings shall be suitable for the pressure and service to be encountered
and shall be designed to withstand 150 percent of maximum operating pressure
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