Red Dust environmental protection equipment specializing in the production of all related equipment, the main products are: a round mouth manual flapper valve, flapper valve side port manual, non-standard flapper valve, non-standard flapper valve, flapper valve temperature. Red environmental protection equipment mostly manual flapper valve for discharging into supporting the use of square mouth, round mouth two kinds. Its compact, wearable, a small amount of leakage, a simple, flexible movement, effort, etc., can work, mouth to make a choice at a high temperature, high dust, magnetic environment based on the shape of the discharge. Red environmental protection equipment manufactured using high-quality carbon steel welded, widely used in metallurgy, carbon, chemicals, building materials and other industries. Flue gas piping system used for flue gas cleaning system regulation, switching effect. Red environmental protection equipment manual flapper valve port type to make a choice based on the shape of the discharge. I plant the manual flapper valve durability, flow resistance, small size, light weight, widely used. Manual flapper valve sealing structure can be divided into soft seal and hard seal structure. Good technology, compact structure, sealing seat structure for manufacturing activity, anti-wear and automatic compensation function, thus longer life. Red environmental protection equipment, also known as a manual valve flapper flapper door manually, is widely used in building materials, metallurgy, chemical, electrical and other industries, as the various types of dust removal equipment hopper unloading equipment and a variety of mills, dryers, silo unloading equipment and other equipment to prevent the Wind, blowing.