MIL-P-19692E
3.1.2 System characteristics. The detail specification shall include the
hydraulic system characteristics in which the pump is to be used, as
referenced in SAE-ARP819.
3.2 Qualification.
Pumps furnished under this specification shall be
products which have been inspected and passed the first article or
qualification inspection as specified herein and in the detailed pump
specification.
3.3 Functional requirements.
The hydraulic fluid shall be specified in the
3.3.1 Hydraulic fluid.
detail specification.
3.3.2 Rated discharge pressure. This is the maximum pressure against
which the pump is required to operate continuously at rated temperature and
rated speed. The design of the pump shall be such as to maintain rated
discharge pressure at the following combination and range of conditions:
From 100°F (38°C) to rated fluid temperature.
b.
From 50 to 100 percent of rated speed and specified overspeed
at rated inlet pressure and zero flow, using the hydraulic fluid
specified in the detail pump specification.
The values of the rated discharged pressure and tolerance range shall be
specified in the detail pump specification and the values shall be in
accordance with table I. The permissible tolerance range on rated discharge
o
Pressure shall be doubled in each direction for fluid temperatures below 100 F
(38°C) or pump speeds from 25 to 50 percent of rated speed.
TABLE I
Rated discharge pressure.
3.3.2.1 Overpressure. All pumps with rated discharge pressure up to and
including 3000 psi (21000 kPa) shall be qualified to 125 percent of rated
discharge pressure. Pumps with rated discharge pressure above 3000 psi (21000
kPa) shall be qualified to a discharge pressure of 850 psi (6000 kPa) above
their rated pressures. Overpressure values are listed below:
1875 psi (13000 kPa) overpressure
a. 1500 psi (10500 kPa) system =
3750 psi (26000 kPa) overpressure
b. 3000 psi (21000 kPa) system =
5
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