Plunger stop pneumatic valve principle and installation

embolism type by the pneumatic valve is normal as variant of pneumatic valve. In the pneumatic valves, pneumatic disc and seat is usually designed on the basis of the principle of plunger.
pneumatic polishing disc pillars plug connected to pneumatic valve stem, seal is set in the column inserting two elastic sealing ring. Two elastic sealing ring with a set of rings is separated, and through the air valve cover nut to the load of the pneumatic valve cover pressed around the plunger seal. Elastic sealing ring can be replaced, can use a variety of materials, the pneumatic valve is mainly used in the 'on' or 'off', but with a special form of plunger or special thimble, can also be used to adjust flow.
embolism type by the pneumatic valve belong to mandatory sealed pneumatic valve, in pneumatic valve is closed, so must to pressure pneumatic disc, to force a sealing surface does not leak. When medium by pneumatic disc below into the pneumatic valve, operating force required to overcome resistance, pneumatic stem and packing of the friction force is produced by medium pressure and thrust, close the pneumatic valve force than the pneumatic valves open force is big, so the larger the diameter of the pneumatic valve stem, or pneumatic stem top bending failure happens. In recent years, from the seal of the pneumatic valve, the flow direction of medium by the pneumatic valve is replaced by air above the disc into the pneumatic valve cavity, in the medium pressure at this moment, close the pneumatic valve is small, the force and the great strength of pneumatic valve, pneumatic valve stem diameter can be reduced accordingly. At the same time, in the role of media, this kind of pneumatic valve is tight.
how it works:
when rotating the handwheel, through pneumatic valve rod drives the piston movement up and down the guide ring, the plunger end oblique cone with pneumatic seat cone separation or complete pneumatic valve opened or closed. Between plunger and seal ring used in pneumatic valve interference fit, by adjusting the flange bolts, the force of the sealing ring compression produced by the lateral force and pneumatic valve body hole sealing face the Great Wall and column round, so as to ensure the sealing of the pneumatic valve, put an end to the external leakage.
installation and maintenance:
( ） , appearance and hole cavity should be clean when using, don't have to unpick and wash and replacement.
( ） , can be installed in any position, flow direction of medium pneumatic indicated by the arrows on the valve body.
( ） , after a period of time after use, such as a sealing ring wear and tear and wear cause leakage, must first to pneumatic valve is turned off, then in the flange bolts evenly and to slightly to tighten up to not leak, should not blindly will bolt screw too tight, need to replace the sealing ring, should avoid plunger collision, to prevent scratches, pneumatic valve cavity inside should be cleaned up.