Honeywell Gas valve VK4100C1067B

The Honeywell VK4100C1067B is a combined gas valve and ignition system component for burner control, providing safe ignition, flame control, and gas flow regulation for pilot and main burners. It features a standard housing, side gas outlet, and operates at 24V with a maximum inlet pressure of 60 mbar and a flow capacity of 3.1 m³/h. The valve includes a positive feedback system, smooth regulation with amplification, and a softlite time of 1.5 seconds. It is compatible with FERROLI PEGASUS 23-32-56, PEGASUS D 20-23-30-32-40-45, PEGASUS D K 30-40 K130, and PEGASUS D 20-30-40 boilers.

When selecting a replacement gas valve of this type, ensure the connection thread (3/4" external), inlet/outlet diameter (18.6 mm), and operating voltage match the existing system. Verify the maximum working pressure (45 mbar) and ambient temperature range (-15 to 60 °C) are suitable for the application. The valve may have side gas outlet options, and pilot gas connection diameter is 4 mm. Check the electrical connection type (connector or plug-in rectifier unit) and ensure compatibility with the burner control system.

Common failures include the valve not opening or closing properly, leading to no gas flow or gas leakage. Symptoms may include burner ignition failure, unstable flame, or pressure fluctuations. Check for proper electrical connection, voltage supply, and ensure the inlet pressure is within limits. If the valve fails to regulate, inspect for debris or damage to the internal components, and verify the softlite function operates correctly.