Table 10-5.--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 pump.
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 There are six of these valves. They are used for bleeding
inside of test chamber). air from hoses under test.
Pressure relief valve This is a diaphragm type air pressure relief valve. It is
(located under panel).
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.
Hose Burst Test Stand (CGS Scientific)
end of the test hose. Close the Plexiglas cover before
starting the test.
The hose burst test stand, shown in figure 10-18, is
GREER TEST PROCEDURES.--Hose lines
manufactured by CGS Scientific Corporation. This test
should be tested in accordance with the applicable
stand provides a means for pressure testing of aircraft
military specification; for example, MIL-H-5593 or
MIL-H-8794. Each hose specification gives proof test
pressures and other pertinent data for that particular
type hose. Static pressure is developed by closing the
outlet valve and increasing pressure with the pressure
regulator. The pressure in the test hose is indicated on
the fluid pressure gauge. The red follower pointer will
indicate the maximum pressure applied to the hose.
This pressure may be increased or decreased by
adjusting the pressure regulator.
After the test is complete, the stand is stopped by
slowly opening the outlet valve and decreasing the
pressure with the pressure regulator. When the fluid
pressure gauge reads zero, the Plexiglas cover may be
raised, and the test hose is disconnected and removed.
Figure 10-18.--Aircraft hose burst test stand (CGS Scientific).