Wedge two-way structure - metal sealing butterfly pneumatic valve Pneumatic pneumatic valve

one, the preface
in order to meet the high temperature, low temperature, strong corrosion, strong erosion, and the use of long life and other industrial requirements, and metal sealing butterfly pneumatic valve to become one of the fastest growing pneumatic valves varieties in recent years. In some special occasions for metal hard seal butterfly pneumatic valve seal put forward higher request, must be two-way under pressure. And metal hard seal medium pneumatic valve on the market at home and abroad more than double eccentric and three-dimensional eccentric sealing principle, the two sealing structure is under the medium forward flow state, the sealing effect is better; When the media in the current state, because of the medium pressure eccentric torque acting on disc, is not conducive to pneumatic valve seal. Moreover, due to the machining gap problem, reverse sealed performance is greatly reduced.

2, structure of wedge two-way metal seal butterfly pneumatic valve is open and close of the pneumatic valve automatic grinding seal compensation theory as a foundation, combined with the brake pneumatic valve, can hold all pneumatic ball valve, ball track type pneumatic valve products such as structure design.
play great positioning pin ensures disc not because butterfly plate gravity drop, also can be set up in pneumatic valve rod end adjustment block to ensure that the butterfly plate fixed position. During the opening and closing, pneumatic valve stem rely on dovetail groove shrinkage mechanism, screw lift complete vertical linear motion orbit, and butterfly plate must rely on the dovetail groove mechanism, lifting spiral finish to the center of contraction from the pneumatic valve seat, in the process of the sealing surface with the method of open after release first, guarantee from seal to keep clearance after instantaneous from pneumatic valve seat, no friction, so there was no pneumatic valve sealing surface wear, long service life, small torque. And as a result of the pneumatic valve stem wedge blocks and the role of the dovetail groove, increased the force of pneumatic valve sealing force, increases the sealing pressure ratio, the two-way sealing.
combined sealing ring can be used according to user needs processing and shaping with ptfe as the main materials of soft sealing ring, made of stainless steel and flexible graphite layer pressure multilayer metal o-ring seal or whole stainless steel and etc. , all kinds of forms. Depending on its symmetrical set about butterfly plate, respectively with pneumatic valve body symmetry set about pneumatic seat sealing joint, no eccentricity, forming two seal, thus greatly improve the reliability of sealing performance, butterfly plate bidirectional zero leakage.
this product can also be in the middle of pneumatic valve to increase water seal device, it can be in the event of an emergency or pipeline to lumen maintenance water filling, ensure the safety and security of a pneumatic valve in two.
wedge two-way metal seal butterfly pneumatic valve USES the double butterfly plate full cone sealing surface structure, can realize the switch in the process of the pneumatic valve disc sealing surface and the pneumatic valve sealing surface grinding, self correction of constantly, improve the service life. Operation process due to the medium pressure is helpful for pneumatic valve opens, so reduce operating torque.
3, conclusion
wedge two-way metal seal butterfly pneumatic valve sealing structure is novel, unique double disc have two-way sealing function, therefore more suitable for high temperature and high pressure conditions. Pneumatic valve processing good manufacturability, design and manufacture of low cost, is a kind of high technical parameters, high performance industrial conveyor system hard seal butterfly pneumatic valve.
YAZE( Pneumatic company's main products: pneumatic pneumatic valve pneumatic ball valve pneumatic butterfly valve pneumatic actuator