Moog 500 Series Specifications download pdf (Page 11)

PERFORMANCE CHARACTERISTICS

Flow Gain: The no-load flow characteristics of Servo or

Proportional Valves can be plotted to show flow gain, symmetry

and linearity.Typical limits (excluding hysteresis effects) are shown

in Figure 4.

Linearity: The nonlinearity of control flow to input current will be

most severe in the null region due to variations in the spool null

cut.With standard production tolerances, valve flow gain about null

(within ±5% of rated current input) may range from 50 to 200% of

the normal flow gain.

Rated Flow Tolerance: ±10%

Symmetry: < 10%

Hysteresis: typically < 3% for servovalves, < .3% for proportional valves

Threshold: typically < .5% for servovalves, < .1% for proportional valves

Null Shift:

With temperature: 100˚F variation (56˚C) < ±2%

With acceleration: to 10 g < ±2%

With supply pressure: 1,000 psi change (70 bar) < ±2%

PERFORMANCE CHARACTERISTICS

-20

-40

-60

-80

20 40 60 80

-20-40-60-80

INPUT CURRENT–% RATED

CONTROL FLOW–% RATED

±10% LIMITS

200% SPECIFIED GAIN

50% SPECIFIED GAIN

-100

100

-100

100

-20

50%

200%

FIGURE 4

Characteristics

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 23 24

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Moog 500 Series Specifications Page 11