An Air Separator is a hydronic system component that removes entrained air and gas bubbles from circulating fluid to prevent corrosion, noise, and efficiency losses. These devices use centrifugal force, baffles, or mesh media to capture air pockets and direct them to the system’s high point. Proper air removal improves heat transfer efficiency by 5-10 percent.
Operating Principles
Air separators function by slowing fluid velocity within a chamber, allowing bubbles to rise and exit through a vent line. Automatic float vents release accumulated air while maintaining system pressure. Typical separator vessels range from 2 to 20 gallons depending on system size and circulation rate.
System Integration
Air separators are installed at system high points or near the circulator pump on the supply line. They work in conjunction with expansion tanks and check valves. Proper installation reduces water hammer noise, prevents pump cavitation, and extends equipment life by preventing air-related corrosion of ferrous components.