Designed to assist in breaking the vacuum created when molding deep molded parts or thin walled parts such as flower pots, garbage cans and containers.The valve and body are made from hardened Stainless Steel 45-50 HRC.
420 Stainless steel 50-55 RcIncorporating a sintered bronze filter ensuring that debris cannot affect the valves proper function.The material is INOX. 1.4304 HRC 48-54.