Honeywell Gas valve VR4605DB1008U

The Honeywell VR4605DB1008U is a gas valve with flanged connections, designed for use in gas-fired heating systems. It has a maximum inlet pressure of 60 mbar and a nominal inlet pressure of 25 mbar, with a flow capacity of 4.2 m³/h at a pressure drop of 3 mbar. The valve is CE certified to EN 161 and meets leakage requirements per EN 126. It features a top-connected coil and a pressure sensor pipe diameter of 0.5 inch, with an optional output mesh filter available.

When selecting a replacement gas valve of this type, ensure the connection type (flanged) and dimensions match the existing piping. Verify the maximum inlet pressure and flow capacity meet the system requirements. The valve must be compatible with the gas type and the control voltage of the system. Check the pressure sensor pipe diameter and the presence of a pilot flow if required.

Common failures include the valve failing to open or close, leading to no gas flow or gas not shutting off. This may cause the burner to not ignite or to continue running after the call for heat ends. Check for proper electrical continuity across the coil and ensure the inlet pressure is within the specified range. Leaks may occur at the flanged connections or through the valve seat, detectable by gas odor or soap solution test.