This design has obtained national patent in May 2011, patent number: ZL201020575061.8.
Rubber check valve of Yantai Group is made of Yantai Group 35 wear – resistant rubber with strong wear and corrosive resistance.
A wear-resistant pinch valve with excellent corrosion resistant and sealing ability
A Knife Gate Valve with spool made of wear-resistant rubber developed by international advanced technoloy