Spool hydraulic directional control valve 761

electrically-operatedsolenoid-operatedpilot-operated

Product description

The series 761 servo valves for flow control are throttle-type valves for 3-way and preferably 4-way applications. They feature a powerful 2-stage design covering a nominal flow range of 0.5 to 75 l/min (0.125 to 19.5 gpm) at 35 bar valve pressure drop per control spool. The construction is simple and robust to deliver reliable, long-term operation. The pilot stage uses a symmetrical jet-flapper torque motor.

Features

• 2-stage servo valve with mechanical feedback (MFB)
• Jet-flapper pilot technology provides high dynamics, fine resolution and low hysteresis
• High coil forces and rugged design ensure long service life
• Compact envelope suitable for space-constrained installations
• Intrinsic-safe versions (761K) available for certified use in potentially hazardous environments

Specifications

Hydraulic data
Rated flow*: 0.5 to 75 l/min
Standard flow settings: 4, 10, 19, 38, 63 l/min
Max. operating pressure: Aluminum body: 315 bar; Steel body: 350 bar

Performance data
100% step response**: <4 to <16 ms

Electrical data
Rated input***: 8 to 200 mA

Physical data
Mounting pattern: Size 04 (ISO 10372-04-04-0-92)
Weight: 1.0 to 1.7 kg
Additional options: High null bias, magnetic null adjustment, vented motor capacitor, special BSA fit, parallel internal wiring, reverse polarity, very high response

* @ Δp 70 bar (1,000 psi)
** Response at 3,000 psi system pressure
*** Single coil

Characteristics / Technical specifications

• 2-stage design with mechanical feedback (MFB)
• Nominal flow range: 0.5–75 l/min
• Typical standard flows: 4, 10, 19, 38, 63 l/min
• Max. operating pressure: Aluminium 315 bar, Steel 350 bar
• Response time (100% step response): <4 to <16 ms (depending on system pressure)
• Electrical rated input: 8–200 mA
• Mounting size: Size 04 (ISO 10372-04-04-0-92)
• Weight: 1.0–1.7 kg
• Options: Intrinsically safe versions (761K) and various null/adjustment and wiring options