Kromschroder Relief valve VSBV25R40-4 84583010

The Kromschroder VSBV25R40-4 (84583010) is a relief valve designed for gaseous media, with a nominal diameter of 25 mm and a maximum inlet pressure of 0.04 mbar. It is certified by CE and Gosstandart, and is listed under article numbers 84583010 and 624.334.012. This safety component is installed downstream of a gas pressure regulator in a burner or boiler gas train to vent excess gas if regulated pressure exceeds a set threshold, protecting downstream components from overpressure damage.

Parts of this type are selected primarily by connection size, set pressure range, and venting capacity. The set pressure must match the maximum allowable working pressure of the downstream system, and the venting capacity must be sufficient to relieve the maximum possible gas flow under fault conditions. When replacing a relief valve, ensure that the connection size and pressure setting are identical to the original, or that the replacement is specified for the same application. The vent line should be routed to a safe outdoor location and must not be blocked.

A stuck or leaking relief valve can cause pressure drift or fail to protect the system during a regulator failure. Regular testing of the valve's opening pressure is recommended as part of burner maintenance.