Hydraulic Solenoid For On-off Valves

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On-off  solenoid is an actuator that converts electrical current into mechanical motion. As the name suggests, on-off  solenoid is usually applied to hydraulic switching solenoid valves, so it also known as Solenoid for switching solenoid valves.

On-off solenoid generally consists of solenoid coil and core tube also called armature. Solenoid for hydraulic on-off valve move the armature when current is applied to the coil. Continuous power is required to hold the armature in position. Removing power returns the armature to the original position via a spring return.

Compared to another typical kind of solenoid — proportional solenoid , solenoid  for on-off solenoid valves exchange between two points, and proportional solenoid actuator have variable positioning.

On-off solenoid  from Anyang KaiDi include solenoid for Rexroth, Yuken and Vickers directional valve size 6 and size 10.

On-off solenoid working principle

On-off solenoid is generally installed at the end of solenoid directional valve. Take three-position four-way directional control valve as example. As shown in the following figure, the solenoid valve has three undercutting grooves, fuel inlet chamber (p) is among, and working oil sump (A and B) is adjacent, there are two interconnected back oil chambers (T) at the end of valve, spring seat(3), reset spring(4) and push rod(5) are on both ends of main valve core. There are two solenoids on the both sides of valve.

  • When two solenoids are power off, valve core is in the middle. At the moment, P, A, B and T are mutually unintelligible, as shown in figure1.

Rexroth on-off solenoid

  • When the left solenoid is powered, solenoid create magnetic force and push valve core to move right, P and B are connected, A and T are connected. Once the left solenoid is powered off, the force of right reset spring put the valve to the middle position, four oil chambers recovery to the closed state. As shown in figure2:

Rexroth on-off solenoid

  • When right solenoid is powered, iron core of solenoid pull rod and make valve core move left, P and B are connected, A and T are connected. After power outage, valve core bake to the middle position under the force of left reset spring, as shown in figure3.

Rexroth on-off solenoid

rexroth solenoid

Hydraulic Solenoid for Rexroth On-off Solenoid Valve

  • Applications: Rexroth directional control valves NG6, NG10.

  • Technology: introduced from Bosch Company in German

  • Power System: AC/DC

  • Work System: uninterrupted duty and intermittent periodic duty are both ok.

  • Protection Grade: IP65

  • Voltage Fluctuating Range: 85%-110%

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yuken solenoid

Hydraulic Solenoid for Yuken On-off Solenoid Valve

  • Applications: Yuken directional control valves NG6, NG10.

  • Power System: AC/DC

  • Work System: uninterrupted duty and intermittent periodic duty are both ok.

  • Protection Grade: IP65

  • Voltage Fluctuating Range: 85%-110%

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vickers solenoid

Hydraulic Solenoid for Vickers On-off Solenoid Valve

  • Applications: Vickers directional control valves NG6, NG10.

  • Power System: AC/DC

  • Work System: uninterrupted duty and intermittent periodic duty are both ok.

  • Protection Grade: IP65

  • Voltage Fluctuating Range: 85%-110%

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