Resideo Gas valve VK4120V1006U

The Resideo Gas valve VK4120V1006U is a gas valve designed for use in burners and boilers. It operates at a supply voltage of 230 V and features a replaceable coil, which can be serviced separately from the valve body. This valve is part of the Resideo brand and falls under the category of gas valves, with a type designation of 534.331.136. Its primary function is to shut off and meter the gas supply to a burner, opening on command from the burner control when safe gas pressure is confirmed.

When selecting a gas valve of this type, key parameters to match include the brand and series, connection size (typically Rp 1/2" to 2" or flanged), coil voltage (230 V or 24 V AC/DC), and the valve's function (e.g., single or double solenoid, slow opening, servo-regulated, or multiblock). Before ordering, verify the connection size and coil voltage against the existing installation, and ensure the valve's function is compatible with the burner control and gas train configuration. Always follow the manufacturer's installation instructions and check for proper gas tightness after installation.

Common faults with gas valves of this type include coil burnout, leaking seat, drifting outlet pressure, and a seized servo regulator. When these occur, the burner may fail to ignite, shut down unexpectedly, or operate with unstable flame. To diagnose, check the coil for continuity, inspect the valve seat for leaks, and verify outlet pressure against specifications.