Safety valves protect a pressure vessel or system against pressure surges. The safety valve automatically releases the medium (agent) when the pressure rises above the set pressure value (set pressure). After the pressure levels off below the set pressure, the valve closes and the medium stops bleeding. The safety valves can have an open construction – atmospheric discharge, where the medium is released directly to the atmosphere. These open discharge safety valves are used for air, inert gases, non-toxic and non-flammable gases. The medium from enclosed safety valves (angle type) valve is released to discharge piping. They are suitable for hazardous media, steam, fluids, hazardous gases and low temperature gases. A gas-tight version and a version with a bellow are used when there is back-pressure in the discharge system.

Depending on the type, version and nominal diameter of the valve, the set pressure is in the range from a couple to several hundred bar.

The safety valves are used in all industries, in air compressors, pressure vessels, silos, steam boilers, tankers, autoclaves, pressure cylinders, cryogenic systems, chemical plants, shipbuilding industry, offshore industry, food and pharmaceutical industry.