Comparison of peristaltic pumps with other pumps It is understood that peristaltic pumps are the fastest growing technology in the world. Normally, chemical corrosives erode the valves, seals, rotors and moving parts of diaphragm pumps and single-screw pumps, resulting in pumps. Damage caused by production interruption. The peristaltic pump has no valves and does not leak, and there are no mechanical parts on the product line. The fluid only contacts the inner wall of the hose or the pipe, and the cost of the pipe is very low, and it is less maintenance and very durable.
The principle of operation of a peristaltic pump is very simple. A length of hose or tube is placed along the fixed pump casing and compressed from the outside by a roller or a bump (hose pump). As the roller or tab moves along the outside of the tube, the fluid is pushed toward the outlet; when the hose or tube behind the tab returns to its original shape, more fluid is drawn into the pump.
The heart of the pump is a hose or tube. It has a long service life and is resistant to corrosion by concentrated acids, concentrated alkalis and solvents. The flow rate of the peristaltic pump is proportional to the rotational speed. The peristaltic pump has no check valve, which eliminates the root cause of inaccurate measurement, so there is no steam lock phenomenon. However, if there is a valve in the diaphragm pump, it may be stuck or blocked (because of the corrosion of the valve ball or the valve seat), causing a change in flow rate, thereby destroying the consistency of the final product or causing a difference in product quality. The peristaltic pump's adjustment ratio (maximum flow/minimum flow) or flow range is unmatched by other pumps. By simply controlling the rotor speed, the adjustment ratio can be extended to 1 million by equipping tubes of different sizes. Diaphragm pumps typically only achieve a 20:1 speed ratio under the control of a conventional controller. Although the stroke length of the diaphragm can be adjusted to increase the adjustment ratio, the metering accuracy is greatly reduced in the case of a short stroke. When a large flow range is required, two or three or more diaphragm pumps are usually used to control the flow, which can be solved by a peristaltic pump. The initial investment cost of a peristaltic pump may be slightly higher than other pumps, but the installation, maintenance, and spare parts of other pumps and associated ancillary equipment can be very costly, and the peristaltic pump is superior in terms of life cycle cost. In a peristaltic pump, the tube or hose is the only wet part that requires little maintenance, no expensive seals to replace, no valves, and no rotor or stator that can wear out. Only hoses or tubes need to be replaced regularly.
Industrial grade peristaltic pumps deliver thousands of hours of reliable operation. The process of replacing the hose is usually less than an hour before the hose fatigue fails, and in some cases it takes only a few minutes. Moreover, the hose can be quickly and safely replaced without any special tools. This is much less than the 4-6 hour repair time required for a diaphragm or single screw pump, which does not include the extra time they take when moving, transferring and reinstalling. The cost of the hose is very low compared to the repair of a diaphragm pump or a single screw pump, where the wet end replacement components (such as ball valves, rotors and stators) can account for 75% of the initial purchase cost of the pump. The peristaltic pump does not require the installation of ancillary equipment. Diaphragm pumps require back pressure and exhaust valves to ensure proper operation of the internal check valve. Single screw pumps typically require dual mechanical seals, flushing systems, dry run protection and built-in check valves. With a peristaltic pump, the cost of these auxiliary components can be eliminated. Many positive displacement pumps require an additional purchase of a separate control board or frequency converter for variable flow metering. If you need to increase the flow range, the cost and complexity will increase.
The peristaltic pump has a self-priming function (up to approximately 10 meters) which increases the operator's safety as it reduces the handling of hazardous chemicals. The pump also has a dry running function, making it ideal for tank emptying or other unmanned applications. The peristaltic pump can also be reversed and can be used to drain or eliminate blockages by simply changing the direction of rotation. Therefore, the functions and advantages of the peristaltic hose pump are gradually becoming well known. New peristaltic pumps are rapidly becoming the primary choice in the field of corrosive chemicals.
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Label: Comparison of the advantages of peristaltic pumps and other chemical pumps in the corrosive chemical industry
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