Description 1, stainless steel health-grade hand-threaded butterfly valve rubber sealing ring and valve plate are imported parts to ensure the use of butterfly valve performance and service life. 2. Using high precision CNC lathe precision turning valve body, to ensure the reliability of the butterfly valve interchangeability, to avoid the replacement of rubber can not guarantee its performance trouble. 3, the stem inlaid with nylon bushings, reducing friction and thus open flexible and easy. 4. All the steel parts are made of stainless steel, and the rubber is made of food rubber. 5, health-class thread butterfly valve body diameter and pipe diameter, opening narrow and streamline valve plate with the direction of the fluid, flow and resistance is small, no material accumulation. 6. The handle adopts pull type and pull type, which can bear larger operating torque and is not easy to break. 7, open and close the range is 0 ~ 90 degrees, can be fixed in every 15 degrees position, with adjustable, and open and close quickly, easy to operate. 8. Sanitary threaded butterfly valve bodies are detachable connection, simple structure, easy maintenance. 9, shape light and beautiful, the surface is bright and not sticky dust, no burrs prickle hand. 10, after strict strength and sealing test, to ensure quality. 11. No less than 30000 fatigue life tests are carried out by sampling to ensure its service life.