186-BF Stainless Steel Flanged Back Pressure Valve, Spring Diaphragm Type, Maintain Back Pressure & Overpressure Protection For Chemical Dosing Pipeline

186-B back pressure valve adopts integrated spring & diaphragm structure with flanged connection, 304/316L stainless steel body. Installed at outlet pipeline of metering pump. Core functions: maintain constant pipeline back pressure to prevent siphon and guarantee dosing precision of metering pump; automatically open to release pressure once pipeline pressure exceeds set value, protecting pump and pipeline. Pressure can be set on-site by adjusting screw. Used together with pulse damper to reduce water hammer impact. Widely applied in chemical and environmental dosing system.