Kromschroder Gas solenoid valve VG25/15R18NK31 85266200

Kromschroder Gas solenoid valve VG25/15R18NK31, SKU 85266200, is a normally closed solenoid shut-off valve for gas. It has a nominal diameter of 25 mm and a connection thread of Rp 1/2. The valve is manufactured in Germany and features a replaceable coil. It automatically closes the gas flow when de-energized, ensuring safety in gas supply systems.

When selecting a replacement gas solenoid valve of this type, verify the connection size and thread type (e.g., Rp 1/2) to match the existing piping. Ensure the valve's nominal diameter (e.g., 25 mm) aligns with the system requirements. Check the coil voltage and whether the coil is replaceable separately, as this may affect installation. Confirm the valve's function (e.g., normally closed) and compatibility with the gas type and safety sequence of the burner control.

Typical failures of gas solenoid valves include coil burnout, leaking seat, drifting outlet pressure, or a seized servo regulator. Symptoms may include the burner failing to ignite, gas flow continuing when de-energized, or unstable flame. Check the coil continuity, inspect the valve seat for debris or wear, and verify outlet pressure against specifications.