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15
range of strokes with power Figure 14: Bellows
diameters in the range 70mm to 546mm. Loads varying in
angle up to a maximum of 30° from the actuator axis can
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诺冠NORGREN中空活塞杆气缸R07-100-RNEG
Another form of rotary actuator is the rack and pinion design.
Bellows are durable single acting concertina like actuators
which extend when inflated and are similar to the air
诺冠NORGREN中空活塞杆气缸R07-100-RNEG
beThe basic double acting rack and pinion design is shown in
(Figure 10). These larger actuators are often used in the
process industry to operate quarter turn valves.
For use in confined spaces where only a short stroke is
required these cylinders have a small axial overall dimension
for their bore size. They are mostly used in single acting
versions (Figure 12), but are also available as double acting
through-rod styles (Figure 13). They are usually used in light
duty applications.
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