Manual flapper valve, also called a manual spiral valve, flapper door to discharge usually supporting the use of the manual screw diameter and unloader valve inlet facilities, there are two kinds of square and round. The advantage of this valve is that the valve body bore no recess, the media will not jam blockage, and having a full bore flow characteristics, powder particle suitable for use in medium pipe. Manual flapper valve sealing structure can be divided into soft seal and hard seal structure. Manual flapper valve technology is good, compact structure, sealing seat for design activities, anti-wear and automatic compensation function, thus longer life. Flapper valve in the closed and open process, with the gate valve has been close to the sport, making the valve opening and closing force is stable, and has cut off the media and so on. Configuring the hand wheel can be directly used to open and close the valve handwheel. Manual flapper valve is the main equipment powder, grain material, small pellet conveying flow control. Electric flapper valve is widely used in metallurgy, mining, building materials, food, and chemical industries. The gate is equipped with electric, pneumatic, electric hydraulic putter as a drive unit, is to control the flow size, ideal for quickly cutting equipment. Compact flapper valve structure, wear small amount of leakage, a simple, flexible movement, effort, etc., can work normally at high temperatures, high dust, magnetic environment. Pneumatic flapper valve, electric flapper valve, manual valve plates are mostly used for supporting the use of the discharge port is divided into two round side port. Pneumatic flapper valve port type to make a choice based on the shape of the discharge. Xin Jia mechanical flapper valve produced durable, flow resistance, small size, light weight, easy maintenance, widely used. Flapper valve seal sealing structure can be divided into soft and hard seal structure. Manual flapper valve technology is good, compact structure, sealing seat for design activities, anti-wear and automatic compensation function, thus longer life. Since the opening of the role and off the spout at the flapper valve or pipe manual, electric flapper valve, pneumatic flapper valve is installed in a variety of powder gases material hopper, the material can also be controlled by adjusting the opening of its size traffic. Flapper valve drive can be electric, pneumatic and manual device. Manual flapper valve used in metallurgy, chemical industry, food industry, is an ideal material off equipment. Our company can produce feed, the feed-caliber hand flapper valve, flapper valve electric, pneumatic flapper valve 100-600, and also according to the user's requirements for the design and manufacture of non-standard size flapper valve. Manual flapper valve, flapper valve electric, pneumatic conveying systems flapper valve is used in fly ash and powdered dry materials transported object it was closing device can also be installed in the power plant economizer, air preheater lower dry scrubbers, flue ash bucket, but also with supporting the use of electric feeder, operating temperatures up to 600 ° C, light flapper valve weight, small size, no ash ran outside, I produced The flapper valve with three in the electric flapper valve, manual gate valve, pneumatic flapper valve, where you need to use the delivery system. Main parts and materials and connection size category A × AB × BC × CLH nd weight unidirectional 200 × 200 256 × 256 296 × 296 820 100 8-Φ12 62 250 × 250 306 × 306 346 × 346 930 100 8-Φ14 70.5 300 × 300 356 × 356 396 × 396 1050 100 8-Φ14 81 400 × 400 456 × 456 496 × 496 1400 100 12-Φ14 114 450 × 450 510 × 510 556 × 556 1450 120 12-Φ18 130 500 × 500 560 × 560 606 × 606 1610 120 16-Φ18 147 bi-directional 600 × 600 660 × 660 706 × 706 1830 120 16-Φ18 169 700 × 700 770 × 770 820 × 820 2130 140 20-Φ18 236 800 × 800 870 × 870 920 × 920 2440 140 20-Φ18 303 900 × 900 974 × 974 1030 × 1030 2660 160 27-Φ23 424 1000 × 1000 10741074 1130 × 1130 2870 160 24-Φ23 636 Description LMD- I- hand unidirectional tread ground less than 1.7 m handwheel, sprocket chain with more than 1.7 m section number M = 0.105X-113 (X is the center screw from the ground level degrees)