Moog 730 Series Servo Valves

PRODUCT DETILS 

Moog 730 Series Servo Valves Specifications:
Fluid Supply: 730 Series Servovalves are intended to operate with constant supply pressure.
Supply Pressure:
Minimum: 200 psi (14 bar)
Maximum Standard:
3500 psi (245 bar)
Maximum (special order):
5000 psi (350 bar)
Proof Pressure:150% of supply pressure at P port
3000 psi at R port
Fluid:
Compatible with common
hydraulic fluids. Recommended
viscosity range: 60-450 SUS @
100°F (10-97 cSt @ 38°C)
Cleanliness Level:
ISO DIS 4406 code 16/13 max.
14/11 recommended
Operating Temperature:
Minimum: -40°F (-40°C)
(maximum fluid viscosity: 6000 SUS)
Maximum: +275°F (+135°C)
Rated Flow Tolerance: ±10%
Symmetry: < 10%
Hysteresis: < 3%
Threshold: < 1/2%
Null Shift: with temperature, 100°F
variation: < 2%
with acceleration to 10g: < 2%
with supply pressure 1000 psi change:
< 2%
with back pressure 0 to 500 psi: < 2%
Frequency Response:
Typical response characteristics are
shown in Figures 1 and 2.
Step Response:
Typical transient responses are shown
in Figure 3. The straight line portion
of the response represents saturation
flow from the pilot stage which will
increase with higher supply pressures.
The 730 Series is a high performance, two-stage design that covers the range of rated flows from 1 to 15 gpm at 1000 psi valve drop.These valves have a large field replaceable filter for first stage flow that insures long, trouble-free operation. The output stage is a closed center, four-way,sliding spool. The pilot stage is a double-nozzle and flapper, driven by a double air gap, dry torque motor. Mechanical feedback of spool position is provided by a cantilever spring. The valve design is simple and rugged for
dependable, long life operation.