The ASCO K3A542U is a 1/2-inch NPT, two-way normally closed gas solenoid valve designed for positive shutoff of natural gas lines in commercial and industrial burners. It operates on 110/120 VAC and draws about 16.7 watts, with a 0–6 psi inlet pressure range for gas, using a direct-acting mechanism to open and close on energization. Built with an aluminum body and NBR seals, it offers a Cv around 4.4 and a gas capacity of about 374,000 BTU/hr at 0–6 psi, supporting high-flow control in burner assemblies. End connections are 1/2 in NPT, and the valve is commonly used to shut off pilot or main gas supply in boilers, furnaces, and other large gas-burning equipment.
