Resideo VK8205VE5004B ny zawór gazowy

The Resideo VK8205VE5004B gas valve, listed under catalogue article 534.331.111, is a Honeywell-branded component belonging to the gas valves category. Parts of this type shut off and meter the gas supply to the burner. They open on command from the burner control and only when the gas pressure switch permits; in premix burners a pneumatic gas/air link ties the valve to the fan. Selection for a replacement depends on the brand and series, connection size (typically Rp 1/2" to 2" or flanged), coil voltage (e.g., 230 V or 24 V AC/DC), and the required function – single or double solenoid, slow opening, servo-regulated, or multiblock design that includes a filter and regulator. Common failure modes include coil burnout, leaking seat, drifting outlet pressure, or a seized servo regulator. The coil is often replaceable separately from the valve body. In a typical boiler or burner system, the gas valve is part of the fuel admission stage. The burner control initiates a heat demand, runs a pre-purge with the fan, and then opens the valve only after confirming airflow via the air pressure switch. Ignition and flame proving follow, with the ionisation electrode checking for stable flame within the safety time. The valve must respond correctly to the control signals and maintain stable outlet pressure. When sourcing a replacement, verify the voltage and connection size against the existing valve; also confirm whether the replacement must match a specific function like slow opening or servo regulation.