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|  MIL-R-25410G
4.8.6
Inward leakage. With the diluter lever placed in the "100%
i
Oxygen' position, and the oxygen supply valve in the "off" position, a
suction of 10 inches of water shall be applied at the outlet of the
regulator, and the leakage from the outlet shall be measured. The leakage
from the regulator shall pass the requirements specified in 3.6.5.
4.%.7 Over-all regulator leakage. With the diluter lever placed in
the "Normal oxygen'" position and the oxygen supply valve open, the regulator
shall be placed in a leakage chamber. A pressure source shall be connected
to the regulator to provide the inlet pressure as indicated in 4.7.5.
A suitable flow measuring device shall be attached to an open chamber port
and then the chamber shall be sealed. After a 2 minute stabilization period,
the regulator over-all leakage shall be measured. This test procedure shall
then be repeated utilizing the regulators maximum pressure. The overall
regulator leakage shall pass the requirements specified in 3.6.6.
4.8.8 Outward leakage. With the diluter lever placed in the "Normal
Oxygen" position; the oxygen supply valve placed" in the "on" position; and
the inlet capped, a pressure of 17 inches of water shall be applied to the
outlet of the regulator through a metering device. With the pressure
maintained for a period of 2 minutes, the regulator shall conform to the
requirements of 3.6.7.
4.8.9 Demand valve leakage. With the diluter lever placed in the
"Normal Oxygen" position, the regulator shall reconnected to a source of
pressure to provide 30 psig inlet pressure to the regulator, and the oxygen
supply valve shall be placed in the "on" position. Under these conditions,
leakage at the outlet of the regulator shall be measured. The regulator
shall pass the requirements specified in 3.6.8.
4.8.10 Supply valve leakage. The inlet pressure as Indicated in
4.7.5, shall be applied to the regulator for a period of 30 seconds with the
oxygen supply valve placed in the "off" position and the pressure control
lever placed in the "Emergency" position. Leakage at the outlet port of
the regulator shall then be measured by the application, at the outlet
fitting, of leak test compound conforming to MIL-L-25567. The regulator
shall pass the requirements specified in 3.6.9.
4.8.10.1 Pressure gage scale error. The regulator shall be connected
to a pressure source to provide maximum inlet pressure. With the regulator
supply valve placed in the "off" position and the presure control lever
placed in the "Emergency" position, the inlet pressure shall be increased
from the inlet pressure indicated in 4.7.5 to maximum supply pressure using
the test pressure increments specified in Table IV. The supply pressure
shall then be decreased using the same increments to zero pressure. With the
pressure increasing, the pressure shall be brought up to, but shall not
exceed the pressure specified to give the desired reading and with the
pressure decreasing, the pressure shall be brought down to but shall not fall
below the pressure specified to give the desired reading. The regulator
pressure gage scale error shall not exceed the tolerances specified in
3.6.9.1.
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