... Pictures:Wafer lift check valve1 The use of standard:H71H/Y/W2 Usage and features: connection with wafer H71 check valve, compact disc ... exercise, because the disc off tour short, and there are spring loaded, closing speed, can significantly reduce the hammer. Products to ... water, oil, air, gas and otherpipeline.The price is very low,and the quality is excellent.We believe ourproducts will make ...