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PUMPS CM4-40 50HZ
This Little Giant pump is perfect for small water features and aquariums. The quiet operation of this pump makes it perfect for indoor use, with a flow rate of 550 gallons per hour. This pump comes with three different sized suction cups at the bottom to mount it on a flat surface, as well as four silicone feet that accentuate the ornate aesthetic of your tabletop or wall-mounted water feature.
The whole set is a great choice for aquarium accessories, to be used in freshwater aquaculture and marine tanks. You can create a beautiful underwater world of your own by keeping the sea creatures like fish or shrimp in your home. This pump can also be used to supply fresh water or other liquid such as juices, juices or local drinks and so on.
China horizontal multistage centrifugal pump Product parameters
| 50Hz | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Model | Model | Driving motor P2(KW) | Q (m3/h) | 2.0 | 3.0 | 4.0 | 5.0 | 6.0 | 7.0 |
| CM4-40 | CHLF4-40 | 0.75 | H(m) | 35 | 33 | 30 | 26 | 20 | 13 |
Technical questions and answers about pumps
What is the function of pump inlet and outlet valves?
A: 1) the pump inlet valve is the part that separates or cuts off the slurry pump from the system during maintenance. It cannot be used to adjust the flow and should be fully opened;
2) The outlet valve is a component to isolate and cut off the pump from the system during flow regulation, startup, and shutdown maintenance.
What is the basis for selecting seals for pumps used in chemical production?
A: the rotation speed shall be selected according to the process conditions, working pressure, and medium corrosion.
What are the types of flat gasket seals?
A: 1) nonmetallic gasket sealing; 2) Nonmetallic and metal composite gasket seal; 3) Metal gasket seal.
What are the main reasons for gasket leakage?
A: 1) leakage caused by design; A. improper selection of flange and flange sealing surface; B. improper gasket selection; C. improper selection of flange and bolt materials;
2) Leakage caused by manufacturing, installation, and operation; A the machining accuracy of flange and gasket does not meet the technical requirements; B when tightening the bolts, the operation is improper, causing the gasket to deviate; C. the flange sealing face is clean and free of impurities.
What is a mechanical seal?
A: mechanical seal, also known as an end face seal, is a device that prevents fluid leakage by making at least one pair of end faces perpendicular to the rotation axis closely fit and slide relatively under the action of fluid pressure and compensation mechanism.
How many sealing forms are commonly used for pumps?
A: there are two kinds, dynamic seal and static seal.
What are the main reasons for mechanical seal leakage?
A: 1) there is too much wear on the sealing face between the moving ring and the static ring, and the load coefficient is unreasonable in the design, causing cracks, deformation, damage, and other phenomena on the sealing face.
2) Several auxiliary seal rings have defects or defects caused by improper assembly, and the selection of auxiliary seal rings is not suitable for working media.
3) The spring preload is insufficient or after the long-term operation, fracture, corrosion, relaxation, and coking occur, and the suspended particles or crystals of the working medium accumulate and block in the spring gap for a long time, resulting in spring failure, the compensation seal ring cannot float, and leakage;
4) Because the perpendicularity deviation between the dynamic and static ring seal end faces and the shaft centerline is too large, the seal end faces are not tightly bonded, resulting in leakage;
5) Due to the large axial displacement of the shaft, the fittings related to the seal are not well matched or of poor quality, which is easy to cause leakage.
According to what materials are used for the friction pairs of mechanical seals?
Answer: it should be selected according to the nature of the medium, working pressure, temperature, sliding speed, and other factors. Sometimes, the ability to withstand short-term dry friction during startup or liquid film damage should also be considered.
Application field
① In the production of chemical and petroleum sectors, most of the raw materials, semi-finished products and finished products are liquids, and the production of semi-finished and finished raw materials into semi-finished products and finished products needs to go through complex technological processes. During these processes, pumps play a role in transporting liquids and providing pressure flow for chemical reactions. In addition, in many installations, pumps are used to adjust the temperature.
② In agricultural production, pumps are the main irrigation and drainage machinery. my country's rural areas are vast, and a large number of pumps are needed in rural areas every year. Generally speaking, agricultural pumps account for more than half of the total output of pumps.Pumps are also the most used equipment in the mining and metallurgical industries. The mine needs to be drained by pumps, and in the process of beneficiation, smelting and rolling, pumps are needed to supply water.
③ In the power sector, nuclear power plants need nuclear main pumps, secondary pumps, and tertiary pumps, and thermal power plants need a large number of boiler feed pumps, condensate pumps, oil and gas mixing pumps, circulating pumps, and ash pumps.
④ In national defense construction, the adjustment of aircraft flaps, tail rudders and landing gear, the rotation of warships and tank turrets, and the ups and downs of submarines all require pumps. High pressure and radioactive liquid, and some also require the pump without any leakage.
⑤ In short, whether it is aircraft, rockets, tanks, submarines, drilling, mining, trains, ships, or everyday life, pumps are needed everywhere, and pumps are running everywhere. That's why the pump is listed as a general-purpose machine, which is a major product in the machinery industry.
⑥ Electric pumps, i.e. pumps driven by electricity. The electric pump is composed of a pump body, a water lift pipe, a pump base, a submersible motor (including cables) and a starting protection de
