Adopts advanced high-density polyethylene molding technology. Anti-corrosion, high mechanical resistance and practical opening. Resistant to acids and alkalis, not suitable for strong acids and strong alkalis. Widely used for chemical process, GRV relief control valve. Prevents spillage of stored chemical liquid. Features: The butterfly valve adopts new technology: it is made of high-density polyethylene and other engineering plastics, and is assembled with innovative structure and beautiful appearance. It has the advantage of resisting acid and alkali, corrosion, and being very robust. Easy to open and so on, and can be used repeatedly to help protect the environment. Widely used in chemical and acid process, liquid storage buckets, tanks, outlet control valves. It has been safely used 3,000 times and passed the tests. The valve is used for plastic container outlet control to prevent liquid splashing. Features: Material: Polyethylene. Inner Diameter or Inlet End Diameter: 75mm or 62mm. Operating temperature: -20C to 70C. Operating pressure < 0.15 MPa (test pressure 0.2 MPa). Content: 1 transfer interface.