KQDL series vertical multi-stage single-suction centrifugal pump

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Product overview

KQD series multistage centrifugal pump is divided into KQDL vertical, KQDW horizontal multi-stage single export-oriented and KQDL vertical centrifugal pump, KQDW horizontal multi-stage export-oriented four more structure. Closer to the pump body of the new return pipe structure design, return pipe is not easy to damage, at the same time enhance the sealing of the pump. Instead of "O" ring rubber bellows mechanical seal is solved easily produce scale, jammed caused by mechanical seal leakage problem, quality is more reliable. Novel structure, superior quality; Running stability, avoid killed; Advanced design, save the investment; Unique parts and reduce the noise.

Application field

KQDL series multistage pump is my company according to the market need and development of series products, this product compared with similar products is small, the head difference between the same specification can be convenient for users to choose. This product is accord with GB/T 5657-5657 < < centrifugal pump technology conditions (Ⅲ) > > standard.

The working conditions

Speed: 1480/2950 r/min

Liquid: clean water or physical and chemical properties similar to water in the liquid.

Liquid temperature: 120 ℃ or less

Flow range: 3.7 ~ 200 m3 / h

Lift range: 12.1 ~ 240 m

The suction pressure of the maximum working pressure: maximum pressure 2.5 Mpa or less + pump

Q: Troubleshooting of diaphragm pump: The troubleshooting guide for diaphragm pumps, when encountered in one or more of the following situations, this information can be used as a guide to help you develop maintenance measures.As shown below, some of the abnormal operating conditions described in this guide are: A) fast circulation / low flow B) no cycle / slow cycle / irregular cycle C) leakage D) noise E) component rupture

Q: What is a gear pump for?: Oil pump casing wearIt is mainly the wear of the floating sleeve hole (the normal clearance between the gear shaft and shaft sleeve is 0.09~0.175mm, and the maximum shall not exceed 0.20mm). The gear work is affected by the pressure oil, the gear tip is close to the oil pump casing, and the low pressure chamber part of the pump body is worn. Another kind of wear is the circumferential wear of the work surface in the shell. This kind of wear is mainly caused by the addition of oil which is not clear, so the oil without impurities is necessary.

Q: What are the advantages and disadvantages of the pump control system and valve control system in the hydraulic system? How to choose in the project?: Large pump control valve controlled energy consumption at least 30% reason is that there are serious throttling loss of a throttle valve control system of severe fever but simple structure and low cost which is why now valve control system still occupy the main market reasons.Pump control system with complicated structure especially when serious nonlinear control unsymmetrical cylinder control effect is not ideal, but the biggest advantage is energy-saving and low fever America professor Monika points out that using the pump control system of hydraulic excavator energy efficiency compared with the valve control system can be improved by over 46% but costs are high. But in control, the three pump invented by Professor Quan LONG of China is a good solution. LZ can find the invention patent or find his paper on sage. It seems that there are three or four SCI about this pump

Q: The distance from the pump button to the ground: Yellow warning pop-up, indicating that the fire control room has issued alarm information, fire alarm controller (commonly known as the alarm host)

Q: Why can't the inlet of centrifugal pump be negative pressure?: Therefore, the centrifugal pump inlet pressure can be negative, and negative number, should be used to pump cavitation margin and liquid saturated steam pressure parameters to specific calculation. Sometimes, the liquid saturated steam conveying pressure is very high, such as the 9 m water column, then the minimum pressure of the pump inlet should be equal to 4+9=13 meters, the atmospheric pressure is higher than 3 meters, not only for negative pressure, even higher than the atmospheric pressure to work properly.

Q: How many kinds of pumps are available and the operating principles of various pumps?: The volume type pump, depending on the periodic change of sealing liquid containing space volume, the energy is periodically transmitted to the liquid, the liquid pressure increased to force the liquid discharge, according to the motion form of work elements can be divided into reciprocating pump and rotary pump. Other types of pumps transmit energy in other forms. As the jet pump work on high-speed jet of fluid will be required to transport fluid suction pump after mixing for momentum exchange in order to transfer energy; water hammer pump by water when braking in the flow of energy transfer is to rise to a certain height; the electromagnetic pump is energized to make the liquid metal in the electromagnetic forces generated in the flow and transport. In addition, the pump can also be classified according to the nature of the transmission fluid, driving methods, structure, use and so on.

Q: Operating procedures for measuring pumps: 3, discharge pipeline unimpeded.4, the pipeline should meet the positive pressure head, that is, in high flow suction conditions work.5, check the direction of the pump, strictly prohibited reverse.6. Check the oil level in the crankcase compartment. For multi cylinder pumps, check that the oil level has reached the required level.7 、 pump motor static grounding is good, meet the requirements.

Q: What is the difference between centrifugal pump and positive displacement pump?: The centrifugal pump is to rely on high-speed rotation of the impeller to do work on the fluid. These two types of pumps are also the most widely used.

Q: What's the word "pump"? Is that what advocates mean?RT: Is generally believed that the "wholesale" is the "hoarding" of "hoarding" variant, can be used to replace the word "store". And "wholesale" compared to "store" is clearly better and better recognize, because the "store" is a phonogram, hoard shaped characters "mouth", said the biggest the range of aggregation, like a grain bin; "Tun" is also phonetic, semantic. Tun, originally refers to the grass speared out of shape, with curly tails, and gathered the meaning.In this case, the "fans" can be written as "Yong Tun". But this is also troublesome, because the "store" in addition to read "Tun" (Ping Sheng), another pronunciation of "Dun" (Qu Sheng), who said food utensils, when we had the "Valley" store. So, if the "fans" to "hold", is also wrong. "Bin Zhao Wei fans" although it sounds strange, but at least not ambiguous; if changed to "Zhao Wei", is that we have to hoard may hear "Zhao Wei" or "Zhao Wei hold hip", hold the shield this is not the more the more chaotic change it!It is suggested that the "fans" to "fantastic", the modified method was acceptable. In modern Chinese, "public" does not necessarily mean that many, can also refer to a single. "One of the masses", "one of the audience (or audience)" this kind of argument, has been about good. Since this kind, we say "a fantastic" what not? "Fantastic" at least than the "fans" straightaway. The problem is, the word and Hong Kong Standards, there is no "fantastic".

Q: Why is the sewage pump device coupler?: Automatic coupling installation of sewage pump is a sewage pump with automatic coupler and a guide rod guide chain fixed installation, convenient maintenance, manual maintenance can be directly hung up by the pump coupling device, ordinary sewage pump is generally Mobile

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