Kromschroder Gas solenoid valve VG25R02NT31D 85207030

Kromschroder Gas solenoid valve VG25R02NT31D (SKU 85207030) is a Class A gas valve according to EN 161, certified in the EU. It has a nominal diameter of 25 mm and a connection thread of Rp 1/2. The valve is designed for automatic gas supply control in industrial heating systems, burners, and boilers, and includes a flow adjustment feature.

Parts of this type are selected by connection size (typically Rp 1/2" to 2" or flanged), coil voltage (230 V or 24 V AC/DC), and function (e.g., single or double solenoid, slow opening, servo-regulated, or multiblock). Before ordering, verify the gas type, pressure range, and electrical supply compatibility. Installation involves standard threaded connections, and the coil is often replaceable separately from the valve body.

Common failure modes include a burnt-out coil, leaking seat, drifting outlet pressure, or seized servo regulator. Symptoms may include the burner failing to ignite, gas flow continuing when it should stop, or inconsistent flame. Check the coil continuity, seat sealing, outlet pressure stability, and servo regulator movement.