The flanged concentric butterfly valve is newly developed based on our experience in years of producing valves and requirement of market for high-performance,water-save and energy save.It is simple in design,excellent in performance and wide in application.It is ideal for throtting or shutting off the flow of corrosive or incorrosive gases,liquids,semiliquids and solid powder,and can be installed in pipelines or on vessels in the industries of petroleum processing,chemicals,food,medicine,textile,paper making,hydroelectricity engineering,ship building,water supply and sewage,metallurgy,energy engineering as well as light industry,etc.

1.No any leakage at the contact surface of rubber and the body's inner owing to the rubber is vulcanized at the in-side of body.

2.Firm rubber liner without moving and rising can provide with high reliability in running operation of ten thousands circles.

3.Resonable bubble-less sealing design between rubber with disc can give a small torque need,highsealing pressure.

4.Adoping flange design with good centring capacity,this valve can be used at the end of piping.And pipe at upper or lower reaches can be removed in repairing.