Design Advantage: 1. High performance impact resistance of PEEK valve plate ———— low loss of the valve seat and valve plate 2. Special Structre design ———Decrease the valve plate tilting movement 3. Large amount of springs ——— low stress and long life 4. Optimum design of the valve bonnet and air mattress ———— long service time of the valve plate, low noise Suitable Area: 1. Cleaner gas source 2. Medium-High pressure condition