The Trane VAL7973 is a natural gas valve designed for use in residential and commercial HVAC systems. It controls the flow of natural gas to the furnace burner, ensuring safe and efficient operation. When energized with a 24-volt signal, the valve opens, allowing gas to flow. Conversely, when de-energized, the valve closes, stopping the gas flow. For an efficient and reliable HVAC... https://www.partshnc.com/val7973-trane-12-24v-natural-gas-valve