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Main components and materials of cam rotor pump
Are cam rotor pumps reasonably priced? The cam rotor pump can be applied to the sewage sludge residual sludge and sludge return process, but compared with the submersible sewage pump and centrifugal pump, the market awareness is low, the working principle of the cam rotor pump is not understood, plus 10 times higher Times the price, it is difficult for customers to accept. The high cost of the cam rotor pump is related to the working principle and manufacturing cost.
Related to how it works
The working principle of the cam rotor pump is to form a closed cavity between a pair of rubber-covered rotors and a pump casing placed in parallel. When the rotors are rotated and matched, the medium is sucked in and discharged to achieve the purpose of conveying the medium. The high price of the cam rotor pump is reflected in the highly integrated pump body, reducing the footprint, using wear-resistant and corrosion-resistant materials, and ensuring the use of the product, extending the replacement time of the parts and the overall service life of the pump.
Related to manufacturing costs
The cam rotor pump consists of a pump casing, a rubber-coated rotor, a mechanical seal, a synchronous gear, a radial / axis protection liner, and a shaft.
Maintenance method is the highlight
The maintenance method of the cam rotor pump is relatively simple. There is no need to remove the management and the motor, and the pump casing can be removed online to perform the replacement of parts and routine maintenance.
Comprehensive use cost within 10 years is an advantage
The high cost of the cam rotor pump is reflected in the purchase price. Because of the positive displacement pump structure, the efficiency of the pump is> 90%, and it can reach more than 92% in the activated sludge treatment process of the sewage plant. The greater the sludge treatment volume, the more obvious the advantages, and the high pump efficiency will save energy costs. The medium is in contact with the pump casing, rotor, and shaft seal. Since the online maintenance method (without removing the pipeline and motor) is used, the price of spare parts accounts for 10% of the entire pump, so the maintenance cost is low.
The parts of the cam rotor pump are used in a medium-level sewage plant, and the replacement cycle is between 2-3 years. As a whole, we use the table to calculate the use cost. We take the activated sludge treatment process with Q = 60m³ / h, H = 5bar, and moisture content = 98% as an example.
The advantages of the cam rotor in the 10-year life cycle are obvious
From the above figure, it can be clearly felt that during the 10-year service life cycle, the comprehensive use cost of the cam rotor pump is between 45% and 50% of the submersible sewage pump. The initial purchase cost is several times the submersible sewage pump, but the use cost is economical. reasonable. We do not calculate the maintenance cost here. Many well-known, submersible sewage pumps work in the water, the overall wear resistance and efficiency are not ideal.
Therefore, from a technical point of view, the advantages of cam rotor pumps for sludge treatment processes greater than 50m³ / h are very obvious. Small flow conditions, many small and medium-sized sewage plant renovation projects, the flow is in the range of 10m³ / h-35m³ / h. With a focus on pump efficiency and maintenance costs, choosing a cam rotor pump is a good choice.
Are cam rotor pumps reasonably priced? With us helping you calculate the account again, do you think that the use of cam rotor pumps in sewage plants will become a trend?
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