Bao Cheng manual gate valve manual valve highest price spiral, contact Liu Ying 0317-8226445 15612792509 QQ 2498762315 manual gate valve used in building materials, metallurgy, mining, power, chemical, glass, light industry, food and other industries top of your library, reservoir bottom and import and export. Manual gate valve is to control the flow of larger changes, start frequently, quickly cut off the ideal equipment. Manual spiral flapper valve is mainly composed of frame, gate, screw, nut and other parts. The valve is simple structure, flexible operation, light weight, no obstruction, cutting off quickly, especially for all types of non-viscous solids, powders and pellets smaller than φ10mm grain transportation and material flow adjustment, manual screw gate-way angle of installation is not restricted. Easy to operate, can adjust the degree of opening anytime. Fluid resistance; opening and closing torque required less; When fully open, the sealing surface by erosion of the working medium is smaller than the cut-off valve; physical structure is relatively simple manufacturing process better. Manual spiral valve works: When the manual valve clockwise one-way screw handwheel to stem stem nut with a difference, the ground rose to the gate slowly open, otherwise it is open. Square manually flapper valve is widely used in metallurgy, mining, building materials, food, chemical and other industries. Manual flapper valve with electric, pneumatic, electric and hydraulic drive unit as a putter is to control the flow size, ideal for quickly cutting equipment. This series of rectangular flapper valve manually welded using high-quality carbon steel, widely used in metallurgy, carbon, chemicals, building materials and other industries. Flapper valve manually compact rectangular structure, wear a small amount of leakage, a simple, flexible movement, effort, etc., can work under normal temperature, high dust, magnetic environment. Contact Liu Ying 0317-8226445 15612792509 QQ 2498762315