INCH-POUND
MIL-DTL-81940/4B
7 October 2011
SUPERSEDING
MIL-V-0081940/4A(SH)
25 February 1992
MIL-V-81940/4
14 December 1990
DETAIL SPECIFICATION SHEET
VALVE, SAMPLING AND BLEED, HYDRAULIC, 3000 PSI
NON-AIRCRAFT APPLICATIONS
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-V-81940.
REQUIREMENTS:
1. The valve (see figure 1) shall be actuated by a rotary type knob or pushbutton. Release of the knob or button
shall automatically return the valve to the closed position. The rotary type knob shall be fully opened with a
maximum rotation of 180 degrees. The valve knob or button return mechanism shall be independent of the valve
poppet, allowing the valve poppet to close automatically by fluid pressure upon release or failure of the knob or
button return mechanism.
2. Torque required to actuate the rotary knob type valve to a fully open position shall not exceed
10 inch-pounds with an operating pressure of 3,000 pounds per square inch (lb/inē) applied to the valve inlet.
3. Force required to actuate the pushbutton type valve to a fully open position shall not exceed 25 pounds with
an operating pressure of 3,000 lb/inē applied to the valve inlet.
4. Valve shall have a protective cap with secondary sealing provisions. Protective cap shall include a security
chain, or equivalent, to prevent loss of cap.
5. The part number shall consist of the basic number of this specification sheet plus a dash number indicating
end fitting and spout as specified in table I.
AMSC N/A
FSC 4820
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