MIL-V-47308A (MI)
The internal leakage of the valve shall be not
3.5.6 Internal leakage.
and any applied
more than 0.15 gallons per minute (gpm) at 1000
control current (see 4.6.7).
3.5.7 Rated flow.
The rated flow shall be
1.75 gpm at no-load
4 ma coil current through series
conditions with a valve pressure drop and
adding coils (see 4.6.8 and 4.7.1 through 4.7.5).
The normal flow gain with coil series
3.5.8 Normal flow gain.
0.04 gpm per ma (see 4.6.8).
connected shall be 0.437
3.5.9 Linearity. Deviation of the normal flow from the normal flow
gain shall be not greater than 0.4 ma (see 4.6.8).
3.5.10 Hysteresis.
The difference in input currents required to
produce the same valve output when the input is cycled for a period greater
than or equal to 15 seconds shall be not greater than 0.16 ma (see 4.6.8).
3.5.11 Null bias.
Null bias control current shall be not greater than
0.12 ma (see 4.6.8).
3.5.12 Threshold.
The maximum threshold shall be not greater than 0.02
ma (see 4.6.9).
3.5.13 Pressure gain.
The blocked port pressure gain shall be not
differential (d) per ma as determined by the slope
greater than 8000
600
(see
of the line connecting the points on the curve between
4.6.10).
3.5.14 Frequency response. With a
2 ma sinusoidal signal applied,
the valve amplitude ratio and phase lag shall be within the limits shown on
figure 2 (see 4.6.11 and 4.7.1 through 4.7.5).
3.5.15 Step response.
The valve shall have a step response of not
greater than 5 milliseconds (ins) . The step response shall be the tine
required for the valve output to change from rated flow of one polarity to 90
4 ma, 20
percent of rated flow of the opposite polarity with an input of a
Hz square wave input (see 4.6.12).
3.5.16 Null shift with t emperature variation.
The null shift over the
fluid temperature range of -31 to
Celsius (C) shall be not greater than
0.16 ma (see 4.6.13).
3.5.17 Null shift with life.
The null bias shall be not greater than
0.16 ma at any time during the rated life of the valve (see 4.6.14).
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