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MIL-V-16556E(SH)
TABLE I.
Materials.
Part
Material
Applicable document
Valve bronze
Body
ASTM B 61
Disc
Nickel-copper-alloy
ASTM B 127; QQ-N-281
Seat rings
Nickel-copper-alloy
ASTM B 127; QQ-N-281
Nickel-copper-alloy
Stem
ASTM B 164; QQ-N-281
Valve bronze
Bonnet
ASTM B 61; ASTM B 62
Valve bronze or steel
Yoke
ASTM B 61; AISI C1018 or
C1020
Vlave bronze or steel
Lever
ASTM B 61; AISI C1018 or
C1020
Bolts and nuts
Naval brass
ASTM B 21, copper alloy
No. C46400, half-hard
Springs
Spring steel, cadmium
ASTM A 125; ASTM A 313
or electroplated zinc
coated
Solenoid and switches
See 3.3.2 and 3.3.3
Manufactured and tested in accordance with MIL-S-1222.
3.3 Construction.  The valve shall be a three-way valve, arranged to allow
flow from the outlet when the solenoid is energized via a relay from the salinity
indicating system, and to be shifted by spring action into the dump position when
the solenoid is de-energized.  The valve shall be provided with a switch
mechanically operated by the linkage connected to the valve stem which will open
the solenoid circuit upon solenoid de-energization, and which can only be closed
when the valve is manually shifted to the outlet position.  The valve shall be so
constructed that it must be repositioned manually to allow flow to the outlet and
that it may be tripped manually to the dump position.  An additional switch shall
be connected to the linkage in such a way that it will close a circuit to a
signal light to indicate when the valve is in the dump position.  The signal
light shall not be a part of the valve.  The complete valve shall be of the
lightest and most compact construction consistent with reliability.  The valve
shall be constructed for 50 pounds per square inch (lb/in*) working pressure (see
4.2).
3.3.1 Valve.
3.3.1.1 Ports.  The inlet, outlet, and the dump port shall be flanged in
accordance with MIL-F-20042, 150-pound class.
4

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