Classification and characteristics of pneumatic valve flange butterfly

flange butterfly pneumatic valve has a small and light, easy disassembling and maintenance of points, can also be installed in any position. Simple and compact structure, small operation torque, ° slewing open quickly. Flow curve tending to straight line regulation performance is good. Be used between the butterfly plate and pneumatic valve rod structure without pin, overcome the possible leak point. Butterfly plate adopts the cylindrical spherical shape and improve the sealing performance and prolong the service life of the pneumatic valve, with pressure opening and closing more than ten thousand times remain zero leakage. The seals can be replaced, and reliable sealing achieve two-way sealing. Butterfly plate can spray coating according to user requirements, such as nylon or ptfe. The pneumatic valve can be designed as flange connection and connection to the clamp. Can choose manual, electric or pneumatic drive way.
flange butterfly pneumatic butterfly valve is mainly pneumatic valve and the flange to the link, the flange butterfly pneumatic valve has some characteristics of the nature. The pneumatic valve body material is carbon steel, pneumatic valve, pneumatic valve flange butterfly disc acceptance of steel plate welding form, its advantage is that the weight is light, and the steel plate is higher than cast iron to sealing, easy to guarantee work under high vacuum pneumatic valves. In order to prevent the welding deformation and stress after welding, to deal with the stress, to ensure that the assembly after the installation is not deformation, to ensure that the pneumatic valve performance. Pneumatic valve flange butterfly design features:

. Two-way sealed

traditional pneumatic valves, flange butterfly usually due to its structure, in the opposite direction ( For sealing direction) Work pressure, can't very good seal, relevant national standard and no two-way sealed mandatory, but design of pneumatic valve can ensure the company achieve the result of two-way sealed under the working condition of PN. Can use either through bolt, also can use a single bolt connection respectively, replacement and maintenance of pipeline. Shaft and plate taper pin, screw torque available or without pin connection, realize the opening and closing. Double side flange connection standard will revise hole, all during the installation process is easy to find.

. Using the seal design concept

pneumatic valve sealing ring with a rubber directly with serrated embedded pneumatic disc, do not need to use compression ring or bolted, avoiding the traditional bolt plate type sealing to seal uneven, the bolt falls off and seal premature failure. Sealing ring in the opposite direction under the action of stress at work, since the sealing force, increase the sealing pressure, seal pressure pneumatic valve seat, the greater the pressure of work, the opposite direction, since the greater the sealing force also, so that the sealing ring combined closely with the pneumatic valve seat, the two-way sealing effect.

. Pneumatic disc rigidity, not easy to deformation

flange butterfly than pneumatic valve DN pneumatic disc for the circulation of planar truss structure, small flow resistance, good rigidity, working in the opposite direction under pressure, not easy deformation, the sealing ring not with pneumatic disc deformation from pneumatic best seating points, thus ensuring the sealing effect of sealing ring.