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|  MIL-V-16556E(SH)
3.3.1.2 Bonnet.
The valve bonnet shall be bolted
the body.
CO
3.3.1.3 Disc. The valve disc shall be guided and positively secured to the
valve stem, but in such a manner as to permit replacement.
3.3.1.4 Seats. The valve seats shall be renewable. The valve disc or seat
shall be provided with a resilient insert for seating (see 4.2.2 and 4.2.3). The
resilient material shall be in accordance with MIL-G-22050.
3.3.1.5 Stuffing box. A stuffing box shall be provided, packed with
acceptable packing. Stuffing box shall be provided with glands, and shall be so
constructed as to prevent excessive bending on stem. Glands of valves 2 inches
and below may have gland nuts; those 2-1/2 inches and above shall be of the
bolted type.
3.3.2 Solenoid.
The electric equipment shall conform to MIL-E-917 and
shall be suitable for an ambient temperature of 40 degrees Celsius (C). The
noise level (hum) shall be kept to a minimum by using shading coils and accurate
and small clearances between moving parts. The solenoid shall be provided with
dripproof covers in accordance with MIL-E-2036, and shall be arranged for
entrance of cable conforming to type LSDSGU of MIL-C-24643 and MIL-C-24643/15.
3.3.3 Switches. The switches shall be in accordance with MIL-S-8805 and
MIL-S-8805/1, and shall be mounted in a watertight enclosure in accordance with
MIL-E-2036, arranged for entry of cable conforming to type LSDSGU of MIL-C-24643
and MIL-C-24643/15.
3.3.4 Power. Electric equipment shall operate from a normal 115-volt, 60
hertz (Hz), single-phase power source.
3.3.5 Threaded parts. Threaded parts shall conform to FED-STD-H28. The
construction shall be such that standard wrenches can be used throughout.
3.3.6 Welding and allied processes.
Welding and allied processes shall be
in accordance with MIL-STD-278.
3.3.7 Shock. Valves shall pass the requirements of high-impact shock tests
in accordance with MIL-S-901 and MIL-STD-798. Equipment and test classification
shall be grade A, hull mounted, principal unit, complete assembly, class 1,
type A.
3.3.8 Vibration. Valves shall pass the vibration requirements in accor-
dance with MIL-STD-167-1.
3.3.9 Interchangeability.
In no case shall parts be physically inter-
changeable or reversible unless such parts are also interchangeable or reversible
with regard to function, performance, and strength.
3.4 Drawings. When specified in the contract or order, drawings shall be
prepared (see 6.2.2 and the appendix).
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