Spool hydraulic directional control valve 4WS2EM10-5X/90B11ET315K31EV

electrically-operated4-way3-way

Valve to control position, force, pressure or velocity 2-stage servo valve with mechanical or mechanical and electrical feedback 1st stage nozzle/flapper plate amplifier For subplate mounting: Porting pattern according to ISO 4401 Dry control motor, no contamination of the solenoid gaps by the hydraulic fluid Can also be used as 3-way version Wear-free control spool return element Control external or with integrated electronics (OBE) Valve and integrated control electronics are adjusted and tested Control spool with flow force compensation Control sleeve centrically fixed, thus low susceptibility to temperature and pressure Pressure chambers at the control sleeve with gap seal, therefore no wear of the seal ring Filter for 1st stage freely accessible from the outside Valves of type 4WS(E)2EM10-5X are electrically operated, 2-stage directional servo valves. They are mainly used to control position, force and velocity. These valves are made of an electro-mechanical converter (torque motor) (1), a hydraulic amplifier (principle: nozzle flapper plate) (2) and a control spool (3) in a sleeve (2nd stage) which is connected with the torque motor via a mechanical feedback. An electrical input signal at the coils (4) of the torque motor generates a force by means of a permanent magnet which acts on the armature (5), and in connection with a torque tube (6) results in a torque. This causes the flapper plate (7) which is connected to the torque tube (6) via a bolt to move from the central position between the two control nozzles (8), and a pressure differential is created across the front sides of the control spool.