Auto-Air Vents

Air release valves are widely used in water supply, drainage, fire protection (firefighting), and HVAC systems. They are considered essential because excessive air trapped inside a pipeline creates air pockets and empty sections, preventing pumps from delivering the required flow of water. Trapped air can also reduce system safety, cause leakage due to excessive pressure, and increase energy consumption. Although an air release valve is a small component installed on a pipeline, it plays a vital role in ensuring the safe and efficient operation of hydraulic systems. Air release valves are typically compact in design, which is why threaded brass air release valves are commonly used. In larger water supply and drainage systems, flanged cast iron air release valves are often selected to provide higher air discharge capacity and improved system performance. PGTECH supplies a comprehensive range of air release valves with pressure ratings from PN10 to PN25, including threaded brass and flanged cast iron models from internationally recognized manufacturers such as TOZEN (Japan) and Flamco (Netherlands).