Structural features: 
 A short length of the structure, the length of its structure only traditional flange check valve 1/4 to 1/8; 
 Small size, light weight, the weight of traditional flange check valve 1/4 to 1/20; 
 The valve closed fast the water hammer pressure; 
 4 horizontal pipe or vertical pipe can be used, easy to install; 
 5 folders lift check valve flow channel is smooth, fluid resistance; 
 (6) is sensitive, good sealing performance; 
 Short valve stroke, the impact of small off valve; 
 Overall structure is simple and compact, handsome in appearance; 
 Long life and high reliability.