China Yongyi A41W A42W Flanged Safety Valve, Spring Enclosed Pressure Vessel Pipeline Overpressure Relief Valve GB JIS ASME

China Yongyi YOY A41W spring low-lift enclosed flanged safety valve and A42W spring full-lift enclosed flanged safety valve. Original Yongyi TS certification, body metal seal, enclosed structure prevents medium leakage. A41W low-lift for liquid media; A42W full-lift with large discharge capacity for water, air and gas. WCB cast steel and 304 stainless steel body options, manufactured to GB, JIS, ASME flange standards. Automatically opens to release pressure when pipeline pressure exceeds preset popping pressure and closes automatically after pressure drops, protecting pressure vessels, gas tanks and industrial pressure pipelines. Set pressure customizable.