What does the diaphragm gas valve do on shutdown?

The diaphragm gas valve is designed to manage the flow of gas in various stages of operation, including during a shutdown. Its function during this phase is critical to ensure safety and proper isolation of the gas supply.

When the system is shutting down, the diaphragm gas valve closes a bleed port while simultaneously opening a closing port. This operational behavior serves to relieve any pressure that may still be present in the gas line, allowing for the safe and effective cessation of gas flow. By closing the bleed port, the valve prevents gas from escaping into the atmosphere, which could pose a hazard. Opening the closing port aids in preventing gas from flowing into the combustion chamber or burner during shutdown, ensuring that there is no risk of gas accumulation or explosion in idle equipment.

This precise management of gas flow helps maintain both safety and operational integrity in gas-powered systems. As such, the valve's actions during shutdown are vital for preventing accidents and ensuring that the system can be safely restarted when required.