Kromschroder Gas solenoid valve VG15R02NQ31D 85205220

The Kromschroder VG15R02NQ31D gas solenoid valve, SKU 85205220, is a normally closed automatic shut-off valve for gas supply in heating systems, burners, and boilers. It has a nominal diameter of 15 mm with an Rp 1/2" internal thread connection. The valve operates at a supply voltage of 120 V AC, 50 Hz, and is rated for a maximum inlet pressure of 200 mbar. It meets EN 161 Class A safety standards and has an IP54 ingress protection rating. The coil is replaceable, and the valve is suitable for both commercial and domestic use.

When selecting a replacement gas solenoid valve of this type, verify the connection size (e.g., Rp 1/2"), coil voltage (e.g., 120 V AC), and frequency (50–60 Hz) match the existing installation. Check the valve function (normally closed, fast opening) and whether it includes a built-in regulator. Ensure the valve's maximum inlet pressure rating (e.g., 200 mbar) is compatible with the gas supply. The coil is often replaceable separately, so confirm the coil part number if only the coil needs replacement.

Typical failures of gas solenoid valves include coil burnout, leaking seat, or seized servo regulator. Symptoms may include the valve failing to open or close, gas leakage, or unstable gas pressure. Check the coil for continuity and the valve seat for debris or wear. Verify the valve opens and closes promptly when power is applied and removed.