Kromschroder Solenoid gas valve VG8R05Q6 85231050

The Kromschroder Solenoid gas valve VG8R05Q6 (SKU 85231050) is a compact, normally closed solenoid valve designed for automatic gas shut-off in pilot lines and small burners. It operates on 120 V AC and features a DN 8 connection with Rp internal thread. The valve body is made of aluminum, with a protection class of IP54/IP65 and a pressure range of 0–500 mbar. It complies with EN 161 and operates within a temperature range of -20 to 60 °C.

Parts of this type are selected by brand and series, connection size (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 with filter and regulator. When installing, ensure the coil voltage matches the control system, the thread type and size fit the existing piping, and the pressure rating is suitable for the application. The valve opens when energized and closes when de-energized, so wiring must be correct for the intended fail-safe operation.

Typical failures include coil burnout, leaking seat, drifting outlet pressure, and seized servo regulator. When the coil fails, the valve may not open, preventing gas flow and causing the burner to fail to ignite. A leaking seat can cause gas to pass when the valve is closed, leading to unsafe conditions. Check the coil resistance and voltage supply, inspect the valve seat for debris or wear, and verify the outlet pressure against the setpoint.