Pressure overload can cause a hydraulic system to cease functioning, which is why pressure relief valve units are vital. A pressure relief valve is a safety component used in hydraulic systems to control the level of pressure a system is experiencing to stop the pressure from getting higher than the pre-defined level.
If the system’s pre-set pressure has been reached, the pressure relief valve is activated and will open to divert the excess flow away from the system and out to the tank. After the system’s pressure level has equilibrated, the valve will close itself until the pressure limit has been exceeded once again.
Pressure Relief Valve Applications
- Water Heaters: Pressure relief valve units are often installed on water heaters to protect them from the effects of excess pressure build-up produced by thermal expansion.
- Plumbing Fixtures: Pressure relief valve units are used in plumbing fixtures to maintain a safe water pressure.
- Backflow Prevention: Pressure relief valve units are installed in backflow prevention technologies to stop the potable water supply from becoming contaminated, stopping water from flowing in reverse whenever there’s a drop in pressure or backflow.
- Water Pressure Regulators: Pressure relief valve units help water pressure regulators to reduce the pressure of incoming water supplies to a safe and controllable level.
- Hydronic Heating Systems: Pressure relief valve units stop hydronic systems from experiencing overpressure.
Learn More Today
If you would like to learn more about any of the pressure relief valve units that HYDAC offers, contact us today. You can reach us by calling 0800 493 2269 or contacting us online.





























