Honeywell Gas solenoid valves VR434PE4012-0000

The Honeywell VR434PE4012-0000 is a gas solenoid valve designed for controlling gaseous fuels in burners, boilers, and furnaces. It features two main shut-off valves (V1 and V2) with a pressure control valve between them, operating on a servo-controlled principle. The valve has a nominal diameter of 34 mm, a maximum inlet pressure of 200 mbar, and a flow capacity of 1 m³/h. It operates at 230 V and 60 Hz, with a housing rated IP40. The body is made of aluminum alloy, seals are NBR and Viton rubber, and the closing spring is AISI 302 steel. The valve is classified as class A+A according to EN 161, and the regulator is class C. It includes a flange kit with one flange, sealing plug, o-ring, four screws, and a 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 existing system. The valve must be compatible with the gas type and pressure range. Check the flange connections and seal standards (DIN 3535, EN 291) to ensure proper mounting. The valve's flow capacity should meet or exceed the burner's requirements. Installation should be performed by a qualified technician, following manufacturer guidelines and local regulations.

Common failures of gas solenoid valves include coil burnout, leading to the valve not opening or closing properly. Seal degradation can cause gas leaks, detectable by smell or pressure drops. The plunger or strainer may become clogged, reducing flow and causing burner instability. If the valve fails to regulate pressure, the burner may exhibit fluctuating flame or fail to ignite. Regular inspection of the strainer and seals is recommended.