2-way hydraulic flow control valve, electrically proportional, up to 240 l/min and 350 bar

We sell ready-made electrically proportional current controllers with control here.
The system can be used to remotely regulate the hydraulic flow rate. This allows, for example, the adjustment of the speed of hydraulic motors or the flow rate in hydraulic valves.

This system has some special features:

• It can generate an LS signal, so it does not require a preceding directional control valve (control unit) for oil supply and can be connected directly in parallel with the pump.
  • The "real" LS signal significantly reduces the load on the hydraulic systems and may also decrease the power demand.
• Thanks to an integrated pressure sensor, it is pressure-compensated and regulates the flow rate independently of the pressure drop.
• An optional directional valve extends the valve to an electrically proportional (double-acting) directional valve
• Very high pressure range of up to 350 bar

It is suitable for expanding existing LS systems with a very powerful hydraulic auxiliary circuit.

The system can be used as an example for the following applications:

• Drive of a hydraulic mulcher
• Drive of a hydraulic pump
• Oil supply for drive systems
• etc.

The system can be used wherever an LS system is employed and the volume flow needs to be precisely controlled.

The following special options can be selected via the above configuration

• Directional valve
  • By adding a 4/3-way valve, the system is expanded into a double-acting proportional control unit. This allows, for example, devices to be reversed.
• Control
  • Without control
    • An external PWM signal must be supplied to the system here to control the current control valve.
  • Only supply proportional amplifiers
    • The flow control valve can be adjusted directly with a 0-10V signal or a 4.7k potentiometer
    • Additionally, the ramp-up times can be adjusted
  • With toggle switch and potentiometer
    • Delivery including proportional amplifier
    • Pre-assembled control unit with main switch and potentiometer for system operation.
  • When ordering with a directional valve, a selector switch (left/right) is integrated into the housing for the directional valve.
    • The offer also includes the 2m power cable with a three-pin plug and a 5m cable between the control box and the flow control valve.
• The system is fully pre-assembled and ready to use immediately.
  

• Maximum flow rate:
  • Without 4/3-way valve
    
    • Optionally 160 l/min or 240 l/min
  • With 4/3-way valve
    • 160 l/min
• Maximum pressure: 350 bar
• Adjustable pressure relief: 70 to 420 bar (preset 250 bar)
• Delta P-LS (Standby Pressure): 14 bar
• Connection sizes
  • Pin (Input)
    • 1" BSP
  • Pmax (Output Current Control Valve)
    • 1" BSP
  • A (Output directional valve)
    • 3/4" BSP
  • B (Output directional valve)
    • 3/4" BSP
  • T (return line)
    • 1" BSP
  • LS (Signal line)
    • 1/4" BSP
• Permissible oil temperature: -15 °C to 85 °C
• Required filtration class: 19/17/14 according to ISO 4406
• Dimensions: See drawing in the accompanying documentation
• Approved oils: HLP, STOU, UTTO oils (only mineral oils approved; other oils only after consultation)
• Possible input signals
  • 12V: 0 to 1150 mA
  • 24V: 0 to 590 mA
  • 0-10V (optional)
    • When delivered including proportional amplifier
  • 4k7 potentiometer (optional)
    • When delivered including proportional amplifier

Here you can download the accompanying documentation!