OM VAU 3/8" CROSS LINE RELIEF VALVE
VAU 3/8” (V0440) – Cross-line Pressure Relief Valve
Product description:
The V0440 type VAU 3/8” cross-line pressure relief valve is a combination of two intersecting safety valves designed to protect hydraulic cylinders and hydraulic motors. Its function is to limit the maximum pressure on both lines, safeguarding the system against sudden pressure spikes, overloads, and potential damage. This valve is ideal for anti-shock applications and allows different pressure settings between the two working ports. The valve body is made of zinc-plated steel, while the internal components are heat-treated and ground steel, ensuring high durability and minimal internal leakage.
Main features:
- Type: VAU 3/8”
- Part number: V0440
- Connection (V1 – V2): G 3/8”
- Max. flow rate: 45 l/min
- Maximum pressure: 350 bar
- Adjustment ranges: 80–300 bar
- Factory preset value: 150 bar
- Pressure increase / turn: 30 bar/turn
- Oil temperature: 50°C
- Oil viscosity: 30 cSt
- Weight: 1.208 kg
- Materials: Zinc-plated steel body, heat-treated steel internal components, BUNA-N seals
Operating principle of the valve
The OM VAU 3/8" dual pressure relief valve provides overpressure protection in both directions of a hydraulic circuit using two integrated relief cartridges within a single body.
When the pressure in one direction exceeds the preset value, the corresponding valve opens and allows part of the oil to flow back to the tank, thereby reducing the pressure. This ensures that the system does not exceed the safe operating pressure range in either direction, regardless of the flow direction during operation.
