4/3 Directional Servo Valves

This pilot operated valve with electrical position feedback provides bi-directional flow control in applications from 80 to 1 100 litres per minute. (Lvdt DC/DC ±10V).

View our detailed specifications below

Servo Valve specifications

• Sizes: (NG) 10, 16, 25, 27, 35
• Unit series: 3X
• Maximum working pressure: P, A, B 350 bar (NG27: 280 bar)
• Nominal flow rate: 80...1100 l/min (Δp = 10 bar)

Features:

• Pilot operated 4/3-way servo solenoid directional control valves NG10 to NG35,
  with approx. 20 % overlap
• Pilot valve NG6, with control piston and sleeve in servo quality,
  actuated on one side, 4/4 fail-safe position when switched off
• Control solenoid with electrical position feedback and electronics for position transducer (Lvdt DC/DC)
• Main stage with position feedback
• Spool with linear travel, with anti-rotation element

Flow characteristic

• S = Progressive
• NG16, 25 and 27 with load tap C1/C2

Subplate attachment mounting hole configuration NG10

• ISO 4401-05-05-0-05
• NG16 to ISO 4401-07-07-0-05
• NG25/27 to ISO 4401-08-08-0-05
• NG35 to ISO 4401-10-09-0-05

External trigger electronics (order separately)

• Electric amplifier for standard curve without ramps
• Electric amplifier with ramps and dead-band compensation

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