The 743 Series Servovalve is a two-stage design which flows up to a maximum of 25 gpm at 1,000 psi valve drop.

The output stage is a closed center, four-way, sliding spool.The pilot stage is a symmetrical double-nozzle and flapper,

driven by a double air gap, dry torque motor.The valve design is simple and rugged for dependable, long life operation.

Technical Details

Fluid Supply: 743 Series Servovalves are intended to operate with constant supply pressure.

Supply Pressure: Minimum: 500 psi (35 bar) Maximum: 3,000 psi (210 bar)

Operating Pressure: 1600PSI

Rated Current: 16mA

Flow: 25GPM

Proof Pressure: 150% of supply pressure at P port 100% of supply pressure 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: -40˚F to +185°F (-40˚C to +85°C) (maximum fluid viscosity: 6,000 SUS)

Rated Flow Tolerance: +10%

Hysteresis: < 3%

Threshold: < 0.3%

Null Shift: with supply pressure 1,000 psi change: < 2%