Double flanged butterfly powder dust powder butterfly valve is an important part of the product, its quality is good or bad determines the overall efficiency of dust, so choose a good powder butterfly is a very important thing. At the time of purchase can choose according to different angles. By adjusting the medium parameters selection of valve: in the production process, in order to pressure the media, flow and other parameters meet the process requirements, the need to install the adjusting mechanism to adjust these parameters. The main principle of regulating agencies, is by changing the flow area of ??the valve and valve seat between the valve, to regulate the purpose of the above parameters. Such valves are referred to as control valves, which is divided into relying on the media itself is called self-powered drive control valve, such as valve, regulator valve, all leading power-driven as he was driving a control valve, such as electric control valve, pneumatic control valve and hydraulic control valve. Backflow valve to prevent the media by choice: the role of this type of valve is only allowed media to flow in one direction, and stop the flow direction. Usually the valve is automatically work in a direction of flow of the fluid pressure effect, the valve opens; opposite direction of fluid flow from the fluid pressure and the valve from the coincidence of acting on the valve seat, thereby cutting off the flow. Check them belong to this type of valve, which includes swing check valves and lift check valves. Swing Check Valve with ordinary hinge, there is a door on the same disc freely leaning tilt seat surface. To ensure that every time the valve seat surface reach the appropriate position, the valve flap design in the hinge mechanism, so that the valve has enough space to swing and make a real flap valve, comprehensive engagement with the valve seat. Valve can all be made of metal can also be embedded in the leather, rubber on metal, or synthetic coverage, depending on performance requirements. Swing check valve in the fully open position, the fluid pressure virtually unimpeded, so by the pressure drop across the valve is relatively small. Lift check valve located on the valve body sealing surface located seat. Addition to this valve disc is free to lift, the other part as the cut-off valves, fluid pressure from the valve seat sealing surface of valve lift, medium return valve flap led to a seat, and cut off the flow. Depending on conditions, the solenoid valve flap can be all metal construction, can also be embedded in the form of rubber or rubber ring in the valve holder. Like off valves, fluid channels through the lift valve is narrow, so through the lift valve pressure drop than the swing check valve a little bigger, and swing check valves for flow restrictions very little. Powder butterfly switch is mainly used for the silo bins, hoppers and equipped with powdery or granular materials. Can be applied to deal with all powdery and granular materials, the use of the material itself gravity valve closure and pneumatic transport of dry materials. Double flange butterfly valve can be installed below the powder hopper, bin, silo, spiral or other type of conveyor, and connecting the pneumatic conveying line. Because of the special structure and the use of this valve engineering materials, it is always a very economical and very efficient choice. Double Flange Butterfly Powder Features: single flange valves: with top flange and folding parts, suitable for connecting a flexible sleeve. Double flanged valves: the same top and bottom flanges. Body: gravity casting, die-cast body strength higher than the valve plate: Rotary, wear resistance, less restructuring parts, lightweight, easy to handle