Air separators are used to eliminate air efficiently and quickly from the piping system in closed loop heating and cooling applications. We supply high-quality air separators for commercial and residential applications. An air vent valve is a safety device that discharges air at the water supply piping in order to avoid air related problems in the water piping systems. Bell & Gossett air and dirt separators remove entrained air, dirt, and sediment from hot water heating systems, thereby providing efficient transfer of heat throughout the system. By removing entrained air within the water, you increase heat transfer, save energy, and have increased heating comfort.