Rexroth A4VG 28 40 56 71 90 125 140 180 250 Pressure Cut - off Valve

1. Product Overview

This product isRexroth A4VG series swashplate axial piston variable pumpofCore built-in protection componentsThe pressure shut-off valve is part of the pump's hydraulic control mechanism and is typically mounted on the side of the pump housing or on a flange. Its function is...The pump's outlet pressure is monitored in real time. When the pressure reaches a preset value, the pump's displacement (swashplate tilt angle) is automatically reduced to prevent system overload.It is one of the most important safety protection devices in a closed system.

2. Core Features

• Overload protection to prevent damageWhen the system pressure rises abnormally due to excessive load (such as actuator jamming or pipeline blockage), the pressure shut-off valve will activate rapidly.Forced pumps transition from "low pressure, high flow" to "high pressure, low flow" or even "zero displacement".This limits the system pressure below the set value, protecting the pump, motor, pipelines, and the entire hydraulic system from damage.

  
  

• Soft uninstallation, no impactPressure shut-off valve throughPressure control is achieved by changing the pump's displacement.This method avoids the huge hydraulic shock and heat generated by high-pressure oil directly impacting the oil tank, making the system operate more smoothly.

  
  

• Improve efficiency and save energyWhen the system pressure reaches the cutoff value, the pump's displacement is almost zero, maintaining only a very small replenishment flow.The load on the engine or motor is reduced to a minimum.This significantly reduces fuel or electricity consumption, improving the overall economy of the machine.

  
  

• Adjustable settingsThe setpoint (i.e., opening pressure) of a pressure shut-off valve is usually...Adjustable(By adjusting the spring preload). During maintenance, the pressure can be precisely adjusted to the specified value using a pressure gauge according to the specific operating conditions of the equipment and the nameplate requirements to ensure that the equipment performs at its best.