Kromschroder Gas solenoid valve VG15/12R18NT31 85265010

The Kromschroder VG15/12R18NT31 is a normally closed gas solenoid valve with SKU 85265010, designed for automatic gas shut-off in burner and boiler systems. It features a Rp 1/2" internal thread, a maximum inlet pressure of 1800 mbar, and operates within an ambient temperature range of -20 to 60 °C. The valve opens in 0.5 seconds and closes in less than 1 second, with an IP54 ingress protection rating. Its body is made of aluminum alloy, and the seal is perbunan. It can be installed vertically, horizontally, or at an angle, and is equipped with a black solenoid coil.

When selecting a replacement gas solenoid valve of this type, ensure the connection thread size, coil voltage, and maximum working pressure match the original. The valve body can be mounted in vertical, horizontal, or angled orientations, but the installation must prevent condensation. Verify the gas type compatibility (e.g., natural gas, LPG) and that the valve's pressure rating meets or exceeds the system's maximum pressure. Always compare the connection size and electrical supply before ordering.

Common failure modes for this kind of valve include coil burnout, leaking valve seat, drifting outlet pressure, and a seized servo regulator. Symptoms may include the burner failing to ignite, gas flow continuing when it should stop, or inconsistent flame behavior. Check the coil for continuity, inspect the valve seat for debris or wear, and verify the outlet pressure against the setpoint.