Bellows seal pneumatic valve applicable conditions

overview to cardiac
bellows seal pneumatic valve is mainly used in flammable, explosive and toxic condition demanding situations, by packing and dual role of corrugated pipe pneumatic valve stem seal, to achieve zero leakage of pneumatic valve and the outside world. Because bellows can only bear tension and compression force, only suitable for in the process of opening and closing of pneumatic make linear lifting movement of the pneumatic valve, the valve stem so corrugated pipe pneumatic valves are generally limited to stop pneumatic valve or gate valve. For the bellows sealed to a wider range of application of the principle, bellows sealed pneumatic ball valve is developed.

to cardiac structure bellows sealed pneumatic ball valve is mainly composed of pneumatic valve, pneumatic valve stem, pneumatic valve stem, corrugated pipe, pneumatic valve stem and pin, etc. In both upper and lower pneumatic valve stem has a pair of spiral groove ( Screw in the same direction) And two pins on the pneumatic valve stem and pin in the upper and lower pneumatic valve rod orbital slot free to move. The air is connected to the stem and ball control pneumatic valve opening and closing.
to cardiac works
when the pneumatic valve rod rotates, installed in pneumatic valve stem pin has a tendency to rotate, but the lower part of the pneumatic valve rod upper part of the spiral groove and spiral twist to the same, will exert - reverse force has a tendency to hinder their movement. According to the principle of force balance analysis of pneumatic valve stem, pneumatic valve rod under the action of will in the spiral groove for the extension of up and down movement only. And because the corrugated pipe is welded on the pneumatic valve stem, the rise and fall of pneumatic valve stem guarantee the safety of the corrugated pipe to use.
derive conclusion
bellows seal pneumatic ball valve is a kind of novel structure, it can effectively solve the bellows in the rotation of the problems in the process of pneumatic ball valve seal, use the two spin to the same spiral groove to make the outside force in the process of passing through the transformation of the three times. Two spiral groove spin to the same, easy to machining, assembly don't need to configure, effectively achieve the modern pneumatic valve processing, assembly is simple, reliable work, convenient operation safety requirements