Honeywell Gas solenoid valve VK4105G1138B

The Honeywell VK4105G1138B is a gas solenoid valve designed for burner control and ignition systems, providing gas flow regulation for both pilot and main burners. It operates with an ambient temperature range of -15 to 60 °C and a maximum inlet pressure of 60 mbar. The valve features a 3/4" external connection thread and a flow capacity of 2.6 m³/h at a pressure drop of 3 mbar. It includes a pilot gas connection diameter of 4 mm and an inlet/outlet diameter of 18.6 mm. This model is compatible with BAXI MAIN Four 18 F, 24, and 240 F boilers.

Parts of this type are selected by matching the connection thread size, maximum inlet pressure, and flow capacity to the burner's requirements. The valve must be installed upright, and the inlet and outlet connections should be checked for compatibility with flanged or threaded fittings. Ensure the electrical connections match the ignition regulator specifications, excluding S4565/S4585 series regulators. Verify the ambient temperature and pressure conditions align with the valve's operational limits before installation.

When gas solenoid valves of this kind fail, common symptoms include inconsistent flame control, failure to ignite, or gas flow interruptions. The equipment may exhibit pressure drops or unstable output pressure, leading to burner shutdowns. Check for blockages in the inlet filter, electrical connection issues, or mechanical wear in the valve mechanism. Leakage may occur, so inspect for gas odors and test according to EN126 standards.