[HC44X (SFCV) rubber disc check Use]: This company produces H44X (SFCV) series rubber flap valve is mainly applied to horizontal installation of the drainage system can be installed on the pump at the outlet to prevent backflow and water hammer damage to the pump. This valve can also be installed on the reservoir inlet and outlet pipe of the bypass pipe to prevent water back to the water supply system. [HC44X (SFCV) rubber flap valve Features]: HC44X (SFCV) rubber flap valve design is mainly made up of body parts, and rubber flap valve cover three main parts. The rubber flap valve from steel plate, steel bar switch life of up to one million times. H44X (SFCV) series rubber flap valve with full flow area design, with head loss is small, easy accumulation of debris, easy maintenance and other features.