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The classification and application of the pneumatic actuators
by：AIRWOLF
2021-01-15
The classification and application of the pneumatic actuator
there are many kinds of pneumatic actuators, applicable to different places, according to the requirement of it using the structure of the control valve main points about several:
1. Through single-seat control valve, the valve structure simple, becomes small, easy to guarantee more closed, even cut off completely. Large differential pressure, fluid and thrust imbalance, so use with some small diameter and low pressure difference of the occasion.
2. The pass-through two-seater control valve body has two valve core and valve seat. This is a common type. Due to fluid flow, the effect on the upper and lower two yan core of thrust in the opposite direction and size close to equal, can be offset each other, so the unbalanced force is small. However, due to the limitation of processing, two core depth yan not keep closed at the same time, so the leakage is larger. According to the valve core and the relative position of yan mountain, the valves in the 9 j is function type and reaction type ( Or is loaded with the loading) Two kinds of model. When the body upright, stem down, fujian core and valve seat asked reduced circulation area called is acting, if the valve core inversion, when yan pole down, increase circulation between valve core and valve seat area, known as reactive.
3. Angle valve Angle valve two take over a rectangular shape, - 'at the bottom in side out. Medium to high weigh, high pressure and containing a small amount of suspended solids and the occasion of solid granule.
4. The 3-way valve tee yan = 19 people and process piping connections. The ways of distribution have confluence ( Two medium mixed into the way) Type and shunt ( A medium is divided into two road) Type two kinds, respectively as shown in figure 5 - 1 - 2 ( d) ，( e) Shown below. This valve can be used instead of two pass valve, apply to ratio control and the bypass control. Compared with direct valve of the same system, can save a two-way valve and take over a three links.
5. Diaphragm control valve USES the body and a corrosion resistant lining the diaphragm, as shown in figure 5 - 1 - 2 ( f) Shown below. Diaphragm yan has simple structure, small flow resistance, flow capacity is larger than other types of valves of the same caliber. Due to the medium with diaphragm isolation with the outside world, so no packing, medium will not leak. This valve corrosion resistance is strong, is suitable for the control of strong acid, strong alkali, strong corrosive medium, can also be used for high viscosity and suspended granular media control.
there are many kinds of pneumatic actuators, applicable to different places, according to the requirement of it using the structure of the control valve main points about several:
1. Through single-seat control valve, the valve structure simple, becomes small, easy to guarantee more closed, even cut off completely. Large differential pressure, fluid and thrust imbalance, so use with some small diameter and low pressure difference of the occasion.
2. The pass-through two-seater control valve body has two valve core and valve seat. This is a common type. Due to fluid flow, the effect on the upper and lower two yan core of thrust in the opposite direction and size close to equal, can be offset each other, so the unbalanced force is small. However, due to the limitation of processing, two core depth yan not keep closed at the same time, so the leakage is larger. According to the valve core and the relative position of yan mountain, the valves in the 9 j is function type and reaction type ( Or is loaded with the loading) Two kinds of model. When the body upright, stem down, fujian core and valve seat asked reduced circulation area called is acting, if the valve core inversion, when yan pole down, increase circulation between valve core and valve seat area, known as reactive.
3. Angle valve Angle valve two take over a rectangular shape, - 'at the bottom in side out. Medium to high weigh, high pressure and containing a small amount of suspended solids and the occasion of solid granule.
4. The 3-way valve tee yan = 19 people and process piping connections. The ways of distribution have confluence ( Two medium mixed into the way) Type and shunt ( A medium is divided into two road) Type two kinds, respectively as shown in figure 5 - 1 - 2 ( d) ，( e) Shown below. This valve can be used instead of two pass valve, apply to ratio control and the bypass control. Compared with direct valve of the same system, can save a two-way valve and take over a three links.
5. Diaphragm control valve USES the body and a corrosion resistant lining the diaphragm, as shown in figure 5 - 1 - 2 ( f) Shown below. Diaphragm yan has simple structure, small flow resistance, flow capacity is larger than other types of valves of the same caliber. Due to the medium with diaphragm isolation with the outside world, so no packing, medium will not leak. This valve corrosion resistance is strong, is suitable for the control of strong acid, strong alkali, strong corrosive medium, can also be used for high viscosity and suspended granular media control.
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