Kromschroder Solenoid gas valve VAN120R/NQ 88012139

The Kromschroder Solenoid gas valve VAN120R/NQ 88012139 is a normally open solenoid relief valve designed for automatic pressure relief and leak testing in gas systems. It has a nominal diameter of 20 mm with Rp 3/4 connection thread and a maximum inlet pressure of 500 mbar. Suitable for natural gas, LPG, air, and biogas, it operates in ambient temperatures from -20 to 60 °C. The valve is CE certified, made in Germany, and features a pilot lamp for position indication. Its coil is replaceable, and it is identified by manufacturer codes 88012139 and 624.337.003.

When selecting a solenoid relief valve of this type, verify the connection thread size (e.g., Rp 3/4) and nominal diameter to match the existing piping. Ensure the maximum inlet pressure rating meets or exceeds the system's operating pressure. Confirm the valve's normally open or normally closed function aligns with the application's safety requirements. Check the coil voltage and replaceability, as coils may be ordered separately. Also, verify compatibility with the gas type and ambient temperature range.

Common failures in solenoid relief valves include coil burnout, which prevents the valve from opening or closing properly, leading to pressure buildup or leakage. A leaking seat can cause continuous gas flow, resulting in pressure instability. If the valve fails to open, excess pressure may trigger other safety devices. Check the coil for continuity, inspect the seat for debris or wear, and verify the pilot lamp operation to diagnose issues.