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Leakage at operating pressure, after firing |
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|  MIL-V-82443(OS)
3.2.3
Materials .
3.2.3.1
Materials and treatments of materials. Unless otherwise
specified in the contract or purchase order, all materials and treatments
of materials and parts used in the manufacture of the valve shall be in
accordance with the applicable documents listed on BuWeps Dwg. 2526651.
3.2.3.2
Metals. Metals shall be of the corrosion-resistant type or
shall be adequately protected to resist corrosion during the normal
storage and service life of the valve. Unless suitably protected against
electrolytic corrosion, dissimilar metals as defined in MS 33586 shall
not be used in intimate contact.
Definitions. Definitions of terms appear in Section 6.
3.2.4
3.3
Performance requirements and product characteristics. Unless
specified otherwise, the valves shall satisfy the following performance
requirements when tested as specified in Section 4.
3.3.1
Leakage at proof pressure. The valve shall be capable of
withstanding a maximum internal pressure of 4500 pounds per square inch,
gage (psig) without leaking and without sustaining permanent distortion.
Leakage at operating pressure, after firing. After firing,
3.3.2
with the squib remaining in the valve body, the valve shall be capable
of withstanding an internal operating pressure of 4500 psig, when pressure
is applied either to the normally closed outlet port only, or to the
inlet and both outlet ports.
Squib bridge wire resistance, before firing. The electrical
3.3.3
circuit of the bridge wire of all squibs, whether separate or assembled
into the valve, shall be continuous and shall have a total resistance of
not less than 0.6 ohms nor more than 1.2 ohms, before firing, when
measured at a current of 0.01 amperes maximum.
Insulation resistance, valve, before firing. The insulation
3.3.4
resistance, between the pins of the valve electrical connector and valve
case, shall be 2 megohms minimum before firing when measurement is made
using a potential of 500 volts root-mean-square (rms) at 60 cycles per
second (cps).
3
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