A safety valve is an automatic pressure-relieving device used for overpressure protection on pressure vessels, pipelines, or equipment.

When the system pressure exceeds a preset setpoint, the safety valve opens automatically to rapidly discharge excess medium (gas, steam, or liquid), thereby reducing the pressure. Once the pressure returns to a safe level, the valve closes automatically to prevent further release. Operating without any external power source and featuring reliable actuation.

Safety valves are widely used in boilers, pressure vessels, petrochemical plants, power generation, and refrigeration systems, serving as a critical component for ensuring safe equipment operation.