Design Advantage: 1. Simple structure —— only one piece of durable nonmetallic valve plate 2. Wide groove ——— the possibility of blockage is smaller 3. Large allowable lifts ———— bigger effective flow area and energy saving 4. Surfacing finishing of the valve bonnet ———— more resistance to oil viscosity ,more durable 5. High performance impact resistance of PEEK valve plate ———— low loss of the valve seat and valve plate,low noise 6. Sturdy spring ———— low stress and long life Suitable Area: 1.High molecular weight: MW>5 2. Medium-Low revolution rate ,Rev<1000 rpm 3. Oil/Non-oil condition