INCH-POUND
MIL-PRF-8932/3A
27 August 1998
SUPERSEDING
MIL-S-8932/3
12 August 1980
PERFORMANCE SPECIFICATION SHEET
SWITCHES, PRESSURE, BULKHEAD MOUNTED, AIRCRAFT, GAUGE, CLASS 3
This specification is approved for use by all Departments and Agencies of the Department of
Defense.
The requirements for acquiring the product described herein shall consist of this specification
sheet and MIL-PRF-8932.
REQUIREMENTS:
1. Dimensions, operating pressure ranges and tolerances. The dimensions, operating pressure
ranges and tolerances shall be as specified in table I.
2. Pressure switch port designations. Each gauge pressure switch shall have two pressure ports
as shown on figure 1 of MIL-PRF-8932. The designation letter "P" shall be stamped next to the
higher-pressure connection and the designation "V" shall be stamped next to low pressure
connection on the gauge switch. Where one port is used for vent (V) and case pressure release
(CPR), the port shall be marked "V + CPR". Where no case pressure release is required the port
shall be marked "V".
3. Proof pressure and drift. The test shall be conducted as follows:
a. The proof pressure and drift test shall be conducted as specified in 4.6.1 of
MIL-PRF-8932, except that the "V' or the "CPR" port (see figures 1 and 2) shall be at an
ambient pressure equal to 14.5 ± 0.5 pounds per square inch while applying the normal system
pressure and the proof pressure.
b. The test specified in (a) shall be repeated except that the "V" port shall be connected to a
vacuum (less than 1 inch of mercury absolute) while applying the normal system pressure and the
proof pressure.
1 of 7
AMSC N/A
FSC 1650
DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.
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