2-Way LS Electrically Proportional Flow Control Valve up to 240 l/min and 350 bar

We sell fully assembled electrically controlled proportional flow regulators with control units.
The system can be used to regulate hydraulic flow remotely. This makes it possible, for example, to adjust the speed of hydraulic motors or the flow rate in hydraulic valves.

This system has several special features:

• It can generate an LS signal, so it does not require an upstream directional valve (controller) for the oil supply and can be connected directly in parallel with the pump.
  • The "true" LS signal significantly reduces the load on hydraulic systems and may reduce power requirements.
• An integrated pressure compensator makes it pressure-compensated and regulates the flow rate independently of the pressure drop. 
• An optional directional valve turns the valve into an electrically controlled proportional (double-acting) directional valve.
• Very high pressure range of up to 350 bar

It is suitable for expanding existing LS systems with a high-performance auxiliary hydraulic circuit.

The system can be used, for example, in the following applications:

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

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

The following special options can be selected using the configuration above.

• Directional valve
  • Adding a 4/3-way valve expands the system into a double-acting proportional controller. This makes it possible, for example, to reverse equipment.
• Control
  • Without control input
    • An external PWM signal must be fed into the system here to control the flow control valve
  • Supply proportional amplifier only
    • The flow control valve can be adjusted directly with a 0-10V signal or a 4k7 potentiometer
    • Ramp times can also be adjusted
  • With toggle switch and potentiometer
    • Supplied with proportional amplifier
    • Preassembled control unit with a main switch and potentiometer for controlling the system.
  • When ordering with a directional control valve, a selector switch (left/right) for the valve is integrated into the housing
    • The package also includes a 2 m power supply cable with a three-pin plug and a 5 m cable between the control box and the flow control valve.
• The system is fully preassembled and ready for immediate use.
  

• Maximum flow rate:
  • Without 4/3-way valve
    
    • 160 l/min or 240 l/min, as desired
  • With 4/3-way valve
    • 160 l/min
• Maximum pressure: 350 bar
• Adjustable pressure relief: 70 to 420 bar (preset to 250 bar)
• Delta P-LS (standby pressure): 14 bar
• Connection sizes
  • Pin (inlet)
    • 1“ BSP
  • Pmax (flow control valve outlet)
    • 1“ BSP
  • A (directional control valve outlet)
    • 3/4" BSP
  • B (directional control valve outlet)
    • 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 (mineral oils only; consult us before using other oils)
• Possible input signals
  • 12V: 0 to 1150 mA
  • 24V: 0 to 590 mA
  • 0-10V (optional)
    • Supplied with proportional amplifier
  • 4k7 potentiometer (optional)
    • Supplied with proportional amplifier

You can download the accompanying documentation here!