ADVANTAGES：
1) Improved PP disc to enhance the performance
2) Thickened body & seal to extend the service life
3) Materials meet drinking water standard
4)The material has been modified by nanometer to improve the pressure resistance and impact resistance
5) Raw materials add anti ultraviolet absorbent and antioxidant, improving the durability, ageing resistance
6) Can be assembled with Pneumatic/Electtric Actuators
7) Small switch torque force