Kromschroder Gas solenoid valve VG25/15R18NT31 85266010

Kromschroder Gas solenoid valve VG25/15R18NT31, SKU 85266010, is a normally closed solenoid valve for automatic gas supply shut-off. It has a nominal diameter of 25 mm with Rp 1/2 connection thread, maximum inlet pressure of 1800 mbar, supply voltage of 230 V at 50 Hz, and net weight of 2.4 kg. Certified to EN 161 with ingress protection IP54, it features fast opening and closing and a robust and balanced design.

When selecting a replacement gas solenoid valve of this type, verify the connection size (typically Rp 1/2" to 2" or flanged), coil voltage (230 V or 24 V ac/dc), and function (single or double solenoid, slow opening, servo-regulated, or multiblock). Ensure the new valve matches the original in connection size, coil voltage, and safety function. The valve body and coil are often separate; the coil can be replaced without removing the valve from the line. Always check gas pressure switch settings and test for tightness after installation.

Common failure modes for this class include coil burnout, leaking seat, drifting outlet pressure, and a seized servo regulator. When such failures occur, the equipment may fail to open or close the gas supply, leading to burner lockout or unstable operation. Check the coil continuity, valve seat sealing, and outlet pressure regulation.