Longshen seal manufacture  Co.,Ltd , is one of the biggest mechanical seal manufactures in china. It is a professional manufacture and exporter of mechanical seals in family water pumps, petroteum industry, paper-making, dyeing, food processing, pharmacy, living-things engineering, water treatment, reactor vessel, general industrial pumps, submersible pumps and marine pumps, gas engin, auto-cooling pumps and auto-compressord, coolmachine. Now, hanfeng has developed 80 series & 1000 sizes of mechanical seal,which can replace the similar products of John Crane &Burgmann. It also supplys various sealing materials such as: Silicon Carbide, Tungsten Carbide, Carbon, Ceramic, Teflon and Industrial Rubber(oil seals)  ect. And our products exported to Europe, America, Southeast Asia. Now Hanfeng aslo makes OEM for some professional pump manufactures in the world. The eighty percent of our products are exported .

Our company possesses advanced production equipment and perfect means of quality control and inspection. All process of production from raw material to finished products has been controlled in accordance with ISO Quality Management System Standard. And our production technology leads in domestic and our products conform to ISO-3069, DIN24960, API610, API682, NF EN12756, ANSI B73.1 & GB6556, JB/T1472 and JB/T5966.