... straining element/equipment.A, overview Y fluorine-butterfly filter is used to remove corrosive medium impurities, protect pumps, valves and ... 1.0 ~ 2.5 MPa Nominal size: 20 ~ 450mm. Fourth, Materials used: Stainless steel Aluminum Bronze Brass Copper Nickel Cast iron Steel ... Plastic Rubber etc.Fifth, Function:These strainers are used in pipelines to protect equipment such as pumps, meters, ...