Safety shutoff valve

With a safety ( and SAV) separating an adjacent gas or fluid system from forming on the other side of the valve undue pressure. In many cases, safety shut serve to protect piping systems from excessive pressure by the failure of a Druckelregelung. The insert can by national and international regulations, such as the DVGW and ÖVGW regulations, be prescribed.

Operation

Direct acting valves

Direct acting valves require no additional power supply. An intermediate chamber in the upper and / or lower pressure is limited by means of the pressure regulator. This chamber is separated from the side to be controlled by a movable but proof mechanism. If the pressure is greater at controlling side or lower than that in the intermediate chamber, the intervening component, and with it the main shut-off moves. Thus, both sides of the Sicherheitsabsperrventiles be separated from each other.

Indirectly acting valves

Indirectly -acting valves by means of auxiliary power, such as compressed air, is operated.

Application Examples

A SAV is installed, for example in gas or district heating connections in buildings to close the media supply automatically when the pressure regulator is defective. This prevents the high pressure upstream of the pressure regulator passes into the downstream pipeline. SAV can be integrated into gas pressure regulators. In many cases it is the SAV, the limit pressure in a certain range set.