The Utica-Dunkirk VG01101 is a natural gas valve designed to precisely regulate the flow of natural gas in HVAC equipment like furnaces and boilers. It measures ½ inch and weighs around 2 pounds. This valve uses a 24V electrical supply and operates at a frequency of 50Hz. In operation, the valve opens and closes based on signals from the HVAC system's thermostat, allowing the right amount of gas for efficient combustion.