The Rubber disc check valve is installed at the outlet of the pump. When the pump is opened, the valve plate is opened by rotating the medium flow and force around the pin shaft outside the valve seat; when the pump is stopped, the valve plate closes by itself depending on the medium reflux and the valve plate weight to prevent media backflow. The valve is widely used in petroleum,chemical, food, textile, paper making, hydro power and other industries, used as corrosive, non-corrosive gases, liquids and other cutoff reflux, eliminate destructive water hammer, protect pipes and pumps. Because the sealing ring of this product adopts inclined design, the closing time is short, and the pressure of water hammer can be reduced. Disc is made of nitrile rubber and steel plate after high temperature pressing, scour resistance, good sealing performance, simple product structure, maintenance, repair and transportation are very convenient.
The swing rubber flap check valve adopts full flow area design, which has the characteristics of small head loss, not easy accumulation of sundries, convenient maintenance and so on. It has small opening stroke and fast speed, and is mainly used in water supply and drainage system. For large diameter dn ¥400 rotary rubber flap check valve, the slow closing cylinder device can be selected, which makes the valve divided into two travel stages: Fast closing and slow closing. The travel time of slow closing can be adjusted