* Suitable gas types: town gas * Closing modes: current impulse or manual * Working life: more than 10years Details:1, fit all kinds of combustible gas, fit 4 hours, 6 minutes, 1 inch different models of new and old, piped gas valve,; butterfly. easy installation, no need to change the original design of gas pipeline configuration, the user can install. 2, with automatic, manual clutch conversion ...