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|  MIL-V-24642(SH)
3.4.12.3 Response time. The valve, when operating at rated pressure
and flow, shall close fully in 1 to 2 seconds. This shall be measured from
the time the solenoid is energized to the time the valve stem is in the full
closed position.
3.4.12.4 Coils.
Coils may be encapsulated or varnish impregnated.
3.4.12.5 Class of insulation. The solenoids shall conform with the
requirements specified for NEMA ICS.1, class H insulation.
3.4.12.6 Temperature rise. The maximum temperature rise for the solenoid
coils , based on 122F ambient temperature, shall be 266F for class H insulation.
3.4.12.7 Mounting positions.
The solenoids shall operate properly when
mounted in any position.
3.4.12.8 Plating. The solenoid plunger, pole piece, and housing shall be
plated in accordance with ASTM B 633.
3.4.12.9 Electrical requirements.
3.4.12.9.1 Operation. Unless otherwise specified in the contract or
order, the solenoid shall be capable of 100,000 electrical operations at rated
voltage. The solenoid shall operate without hesitation when energized or
deenergized. When the solenoid is mounted in any position, the solenoid shall
operate in either a continuous or intermittent duty cycle at 85 percent of rated
voltage.
3.4.12.9.2 Voltage.
The solenoid shall operate at 12 volts full win-e
rectifier d.c.
3.4.12.9.3 Dielectric strength. The solenoid shall withstand the power
frequency dielectric test of NEMA ICS.1.
3.4.12.9.4 Insulation resistance.
The insulation resistance of coil
to ground shall be 10 megohms minimum.
3.4.12.9.5 Coil resistance. The resistance on d.c. coils shall be within
10 percent of the design value at 77F.
3.4.12.9.6 Electrical connection. The electrical connection on the
solenoid shall be in accordance with the following:
(a) Plug - MS3406D-14S-7PY
(b) Receptacle - MS3402D-14S-7SY
3.5 Performance requirements.
of not
3.5.1 Capacity. The valve shall have a flow coefficient
less than 40 as defined in ISA S75.02.
3.5.2 Seat tightness. The seat leakage shall not exceed 20 cubic centi-
meters per hour when pressurized in accordance with 3.5.6.
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