Plunger pneumatic valve and globe valve

the modern industry, agriculture, chemical industry, scientific research, aviation, spaceflight, etc, under the influence of modern science and technology and economic development is very rapid, their development, but also led to the development of related industries, such as the development of industry, the pneumatic valve of further ascension. Plunger pneumatic valve and globe valve nowadays has become a classic of pneumatic valve products, the plunger pneumatic valve and globe valve is the difference between what?
piston pneumatic valve by the pneumatic valve, pneumatic valve cover, stem, plunger, the hole planes, sealing ring, hand wheel, etc. When the hand wheel rotation, through the pneumatic valve rod drives the plunger in the middle of the hole rack up and down reciprocating movement to complete the pneumatic valves open and close function. By the pneumatic valve opening and closing is plug piece of pneumatic valve, sealing surfaces appear flat or cone, pneumatic disc make linear movement along the centerline of fluid.
plunger pneumatic valve is closed by a stainless steel plunger, up and down two elastic sealing ring and a metal frame, the plunger seal and seal closely cooperate to achieve, plunger in the two sealing ring, sealing area is greater than the average stop pneumatic valve; Switch pneumatic valve, plunger piston to move slowly in the sealing ring, interface is almost no wear and closed, under the plunger insert seal, truncation port; Open, plunger, though out of the sealing ring, but it is still hidden in the sealing ring, keep the isolation with the outside world, without leakage.
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.
as of pneumatic valve has the following advantages: simple structure, manufacture and maintenance more convenient, small work schedule, opening and closing time is short. Good sealing, sealing surface friction between the small, long service life. As the disadvantage of pneumatic valve is as follows: fluid resistance is big, required when opening and closing force is larger. Do not apply to the medium with larger particles, viscosity, easy to coking. Poor regulation performance. Plunger pneumatic valve advantages mentioned above, it is the chief drawback of opening and closing speed slower.
through the above analysis, the plunger pneumatic valve and globe valve has a larger difference between understanding. Believe that with the auxiliary of the modern science and technology, the two types of products will be more suitable market demand, perhaps in the future one day, the boundaries of these differences will be more and more small.