Flapper valve is used in systems conveying powder dry fly ash and conveying the material it was too cutoff device can also be installed in the power plant economizer, air preheater, dry scrubbers, flue ash bucket the lower part, but also with supporting the use of electric feeder, working temperature up to 600 ° c, the flapper valve light weight, small size, no external run fly ash, the flapper valve with seal flapper valve, manual valve flapper , three in the pneumatic flapper valve, for your delivery system as needed. 1. Little fluid resistance, the drag coefficient equal to the same length of pipe. 2. Simple structure, small size and light weight. 3. Close and reliable valve sealing surface material widely used plastic, sealing, have been widely used in the vacuum system. 4. Easy to operate, opening and closing rapidly, from fully open to fully closed as long as the rotation 90 °, to facilitate remote control. 5. Easy maintenance, simple ball valve, seals are generally activities, the removal replacement is more convenient. 6. In the fully open or fully closed, sealing surface and the dielectric isolation ball and seat, through the media, will not cause erosion of the valve sealing surface. 7. Wide range of applications, from small to a few millimeters in diameter, large meters, from high vacuum to high pressure can be applied. Pneumatic flapper valve structure features: one-way pneumatic valve with welded steel plate structure, weight bar from the reset mechanism, compact structure, smooth operation. Pneumatic flapper valve, pneumatic valve biplane by the framework of the main gate, gate and cylinder composed of air driven cylinder through the solenoid valve, cylinder ram drive for horizontal reciprocating motion, to achieve the purpose of opening and closing the valve. Simple valve structure, light weight, flexible operation, easy assembly and disassembly, using high-quality carbon steel, high strength, good performance, long life; screw and nut with a soft anti-mask structure, free from outside influence dust. Advantages flapper valve is a valve body bore no recess, the media will not jam clogging, and has full bore circulation characteristics, the sealing structure can be divided into soft seal and hard seal structure. Pneumatic single-way flapper valve called manual knife gate valves, knife gate valve is a gate which is always in close contact with the valve seat seal valves, the principle is open to have a diameter the size of the circular opening the gate, the gate through the gate opening and closing makes opening round Path done with complete detachment and consistent action. The advantage of this is that the valve body bore no recess, the media will not jam clogging, and has full bore circulation characteristics, the sealing structure can be divided into soft seal and hard seal structure. Penetrating knife gate valve is a sophisticated structure, good technology, compact structure, sealing seat for the active structure design, anti-wear and automatic compensation function, thus longer life. In the process of closing and opening the gate valve has been close with the movement, so that the valve opening and closing force and stability, and have cut off the media and so on.