Honeywell Gas solenoid valve VR4605CB1025U

The Honeywell VR4605CB1025U is a gas solenoid valve designed for gas flow control in domestic heating systems, boilers, and water heaters. It features a compression fitting connection, a maximum inlet pressure of 60 mbar, and a flow capacity of 4.2 m³/h at a pressure drop of 3 mbar. The valve includes an internal fine-mesh filter and has a 2.8 mm output aperture. It is CE certified and uses a top connection for the coil, with operator part number v404a 1329 (45.801.130-001).

When selecting a replacement gas valve of this type, ensure the connection thread type and size match the existing piping, as well as the maximum inlet pressure and flow capacity requirements. The coil connection orientation (top, side, or bottom) must align with the available space and wiring. Verify the operator part number to ensure compatibility with the burner control system. Installation should follow manufacturer guidelines, including proper mounting orientation and torque specifications.

Common failures in gas valves of this kind include coil burnout, which prevents the valve from opening, leading to no gas flow and the burner not igniting. Diaphragm or seal degradation can cause internal leaks, resulting in pressure fluctuations or gas odor. A clogged internal filter may restrict flow, causing reduced burner output or intermittent operation. If the valve fails to close, it can lead to overpressure or unsafe conditions, often indicated by abnormal burner behavior or error codes on the control system.