This type of pumping equipment began to be mass-produced in the 50s of the twentieth century. Since that time, despite the invariability of the general principles of the device, the design elements are constantly being improved.
Definition and principle of operation
Peristaltic or peristaltic pumps are units for pumping liquid media of various viscosities. The principle of operation here is based on the fact that the liquid entering the pump is pushed out by deformation of the tube by a mechanical organ. This elastic part is the main element. It uses either a homogeneous tube or a multilayer hose.
Design Features
The performance of peristaltic pumps depends on the cross-section of the tube and the number of rollers deforming it. The more rollers, the more uniform the flow and less ripple. Pump casings are manufactured both as a monoblock and without a common casing, with interconnected modules. Hose pump heads are of straight and swivel type, according to the method of pressing the tube with mechanical rollers.
When choosing equipment, the main attention should be paid to the material of the tube. This factor directly affects the service life. For the production of elastic elements are used:
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silicone;
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neoprene;
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marprene;
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bioprene;
Tubing can be smooth or include special connections for fixing. Various mounting methods are used to connect the pumps.
At the moment, heads have been developed with the ability to quickly replace a failed tube.
Scope
The unique features of peristaltic pumps allow them to be used in various processes. They are required as dispensers in pharmaceuticals, water treatment, brewing, printing and mining. They are even used to pump the blood of patients in medicine, in artificial cardiac arrest, due to their low pumping speed and uniformity.
