The Trane VAL9028 is a fast-acting gas valve designed for safe and reliable gas flow control in HVAC systems. It's typically a compact size, measuring around ½ inch, and operates on a low voltage of 24V for safe and easy integration. When energized, the valve quickly opens to allow gas to flow to the burner in a furnace or boiler. Conversely, when de-energized, it snaps shut to stop g... https://www.partshnc.com/12-24v-fast-open-gas-valve-5