Table 5-6.Function of Controls and Instruments
Air inlet shutoff valve
Connects the shop air to the test stand.
Air pressure gauge
This is a 0-160 psi pressure gauge. It registers the
regulated air pressure being supplied to the booster
Fluid pressure gauge
This is a 0-30,000 psi gauge. It is used to indicate
the fluid pressure under which the hose lines are
tested. This gauge is provided with a red
following pointer and manual reset (for indicating
maximum pressure applied to test hose).
This is a relieving type air pressure regulator. It is
used to set the air pressure to the booster pump to
give the desired fluid pressure in the pressure
manifold. Fluid pressure may be regulated by
varying the adjustment on this regulator.
Mounted on instrument panel.
This is a manual shutoff valve which is used to
bleed air from manifold and to relieve fluid
pressure upon completion of test.
Bleed valve (located inside of
There are six of these valves. They are used for
bleeding air from hoses under test.
Pressure relief valve (located
This is a diaphragm type air pressure relief valve.
It is adjustable by means of an adjusting screw.
This valve limits the air pressure to the desired
maximum for safe operating condition. An
audible whistling noise is indicated as a warning
signal, preventing overpressure and possible
damage to the stand components.