Honeywell Servo-combi gas valve VR420VE5001-0000

The Honeywell VR420VE5001-0000 is a servo-combi gas valve with a nominal diameter of 20 mm, designed for controlling gaseous fuel flow in burners and boilers. It operates at a supply voltage of 230 V and 50 Hz, with a maximum inlet pressure of 200 mbar and a flow capacity of 1 m³/h. The valve body is made of aluminum alloy via injection molding, and it includes a filter element with a cell size of 0.34 mm. It features Class A + A valve classification and Class C regulator classification, with ingress protection rated IP40. The flange kit includes one flange with sealing plug, one o-ring, four screws, and one pressure measuring fitting.

When selecting a replacement gas valve of this type, ensure the nominal diameter, maximum inlet pressure, supply voltage, and frequency match the system requirements. The valve must be compatible with the existing flange connections and control wiring. Verify the flow capacity meets the burner's demand, and check that the valve's classification and standards (e.g., EN 161) align with local regulations. Installation should follow manufacturer guidelines, ensuring proper sealing and electrical connections.

Common failures in gas valves of this kind include sticking or leaking due to worn seals or debris, leading to inconsistent gas flow or failure to open/close. Symptoms may include burner ignition problems, unstable flame, or gas odor. Check the valve for proper operation by testing voltage at the coil, inspecting the filter for clogging, and verifying diaphragm integrity. If the valve fails to regulate pressure, the regulator diaphragm or control valve may be faulty.