Floating pneumatic seat two-way hard seal butterfly valve

one, the preface
triple eccentric floating pneumatic seat two-way hard seal butterfly valve with three ordinary partial hardness seal butterfly characteristics of pneumatic valve is a kind of ° rotating pneumatic valve, plus it wedge Angle sealing principle, has good sealing performance. Triple eccentric structure design can make the butterfly pneumatic valve pneumatic valve seat and seal zero friction in the process of switch, greatly increased the use of pneumatic valve performance and longevity. Floating seal principle of pneumatic valve seat, can achieve two-way pneumatic valve seal. It has some excellent characteristics of other common pneumatic valve, and has its own distinctive features, which can be widely used in tap water, sewage treatment, chemical, oil, thermal power, water and electricity, steel, environmental protection, medicine and health care system, etc.

2, the structure form of triple eccentric floating pneumatic seat two-way pneumatic valve consists of pneumatic valve, hard seal butterfly spring, pneumatic seat clamp, pneumatic seat, sealing ring, pressure plate, disc and pneumatic valve stem of main components, such as shown. Pneumatic valve seat and the center line of the pneumatic valve stem has an eccentric, a pneumatic valve body center with pneumatic valve stem has a eccentric b, sealing surface and the center line of the pneumatic valve body has a beta. Pneumatic seat with pneumatic seat clamp pressure, in the pneumatic valve body can swim. Pressure from the front into, in under the action of medium pressure, pneumatic seat and aerodynamic body there is a gap between c, butterfly plate deformation, pneumatic valve seal. Reverse crackdown, pneumatic seat under the action of medium pressure, go forward, at the same time, the butterfly plate and backward deformation, so the movement of the pneumatic valve seat is compensated the butterfly plate, the deformation of the pneumatic valve seal.



. Pneumatic valve body. Spring. Pneumatic disc holder. Pneumatic valve seat. Sealing ring. Butterfly pneumatic valve plate. The butterfly plate. Pneumatic valve stem
figure adjustment structure of pneumatic valve

3, seal principle
triple eccentric floating pneumatic seat two-way pressure pneumatic valve, hard seal butterfly when pneumatic valve is seated, as shown in figure a. When the medium from the front into the pneumatic seat and butterfly plate under the action of medium pressure, pneumatic seat to move forward, a gap c. With pneumatic valve body center eccentric butterfly plate center, A zone area is greater than B zone area, make the butterfly plate work surface produces pressure difference, to close the butterfly pneumatic valve to move on, because of the triple eccentric wedge Angle sealing principle of pneumatic valve closed more and more tightly coupled with butterfly plate deformation, pneumatic valve to achieve zero leakage. Pneumatic valve from ° ~
in the process of the switch. Pneumatic valve seat away due to seal ring, pneumatic seat back, can't release sealing ring, the pneumatic valve seat wear and tear in the back of the pneumatic valve seat with spring, under the force of spring, pneumatic seat off seal, thereby eliminating the butterfly in the process of the pneumatic valve opening and closing the mechanical wear and abrasion between the two sealing surface.
triple eccentric floating pneumatic two-way pneumatic valve, hard seal butterfly valve seat when the pneumatic valve is seated, as shown in figure b. When the medium enter from the opposite side, butterfly plate under the action of the pressure medium. With pneumatic valve body center eccentric butterfly plate center, E area area is larger than F area area, make the butterfly plate work surface produces pressure difference, make the butterfly pneumatic valve open back, plus the butterfly plate, the deformation of the sealing ring out of the pneumatic valve seat, medium flow from crevice, pneumatic valve can not seal. Pneumatic seat under the action of medium pressure, pneumatic seat backward, a gap c. The movement of the pneumatic valve seat just compensation butterfly plate, the deformation of the pneumatic valve seal, finally realizes the bidirectional pneumatic valve seal.


figure pneumatic valve fitted the different situation of medium to

4, endnotes
triple eccentric floating pneumatic two-way pneumatic valve, hard seal butterfly valve seat with a new structure, two-way sealing is reliable, especially for two-way sealing occasions. Generally three partial hardness seal butterfly, is only applicable to the occasion of one-way seal. Triple eccentric floating pneumatic seat two-way hard seal butterfly valve solves the problem butterfly two-way pneumatic valve sealing technology, and has simple structure, low design adult, is a kind of suitable high-tech products.