KQDW series horizontal single-suction multi-stage 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:Excuse me, what is the water pump from the lotus root?: Submersible sewage pump with septic tank, outlet pipe automatic coupling installation, dipping down can be.

Q:What is the working pressure of the hydraulic pump in the hydraulic transmission system?: Generally speaking, for the fixed size, not limited equipment, the pressure can be selected lower, walking machinery heavy equipment pressure should be selected higher.If the load is selected, the working pressure is as follows:Load <5kN, working pressure <0.8~1MPa;Load 5~10kN, working pressure 1.5~2MPa;Load 10~20kN, working pressure 2.5~3MPa;Load 20~30kN, working pressure 3~4MPa;Load 30~50kN, working pressure 4~5MPa;Load 50kN, working pressure =5MPa;For example, the system work pressure of various machines is as follows:Grinder 0.8~2MPaModular machine tool 3~5MPaLongmen planer 2~8MPaBroaching machine 8~10MPa agricultural machinery, small construction machinery, construction machinery, hydraulic drilling machine 10~18MPa hydraulic machine, large and medium-sized excavators, heavy machinery, lifting transportation machinery 20~32MPa.

Q:What is the difference between the ground pump and the pump in the commercial concrete?: Move back and forth; pour concrete into a certain area. After the filling is finished, the whole pump truck can be moved to another position quickly

Q:What are the reasons for sealing damage of centrifugal pumps?: The reasons for sealing damage of centrifugal pumps are as follows: six, the specific contents and handling methods are as follows:First, the centrifugal pump water quality is poor, containing particles.As a result of poor water quality, containing small particles and medium hydrochloride content is high, forming abrasive wear, centrifugal pump seal plane or pull the surface, resulting in groove, ring groove and so on.Treatment method: improve water pressure or medium, replace machine seal.

Q:What's the meaning of the pump head in the water pump, please advise, thank you: The pump head of the centrifugal pump refers to the shell that contains the impeller and impeller, and also includes the shaft part that drives the impeller. It can be used as the part of the motor and shaft coupling and the base.

Q:What is the pump, how to classify, mainly used in where?: 1. vane pumpThe impeller pump is driven by the impeller to rotate the liquid at high speed and transfer mechanical energy to the transported liquidAccording to the pump impeller and runner structure characteristics can be divided into different:1) centrifugal pump2) axial flow pump3) mixed flow pump4) vortex pumps3. jet pumpA high velocity jet produced by a working fluid is used to eject the fluid, and then the energy of the ejected fluid is increased by momentum exchange

Q:What is the function of the heating pump system for the water pump design?: As the feed water temperature is higher, in the case of non warm pump start, will make the pump body is subject to greater thermal impact; in addition, the flow components with the pump contact heating fast, not contact with water directly heating slowly. This expansion due to uneven speed, it will inevitably produce thermal stress, deformation of the pump body, sealing surface, the joint surface is lax and leaking phenomenon. Therefore, the warm water pump system is designed for the water pump.

Q:Harm of air pump and pump: If the liquid is not full, this situation is generally the suction pipe or pump shell leakage, then easy to cause cavitationHit the pump for centrifugal pumps, centrifugal pump is recommended to start closed, the discharge valve closed, starting is in the state of pump

Q:What are the basic technical parameters of the pump?: Two, pump head H head is the unit weight of the liquid pump pumping from the inlet of the pump (pump inlet flange) to the outlet of the pump (pump outlet flange) energy value. Effective energy is a Newtonian liquid through the pump unit is obtained. The N m/N=m, the height of liquid column pumping liquid. Habits referred to as meters. Three, the pump speed is n RPM pump unit time revolutions, represented by the symbol n, the unit is r/min. four, the pump NPSH NPSH NPSH is also called net positive suction head, said main parameters of cavitation performance. Cavitation has been used a h power of five, the power of the pump. And the efficiency of the pump is usually refers to the input power, which is the prime mover on the pump shaft power, it is also known as the shaft power, denoted by P;

Q:Is the centrifugal pump large or small?: When the liquid is lowered at a certain temperature to the vapor pressure at this temperature, the liquid bubbles. The phenomenon of producing bubbles is called cavitation. When the bubbles are flowing to the high pressure, the volume of the bubbles is reduced so that they are destroyed. This due to the pressure of rising bubbles disappear in the liquid in the phenomenon called cavitation bubble collapse. The local pump is in operation if the over-current part (usually the impeller blade inlet somewhere later) for some reason, the absolute pressure of pumping the liquid was reduced to liquid vapor pressure temperature, liquid vaporization began there, produce a lot of steam bubble formation, when the liquid contains a lot of bubbles by forward high pressure impeller Zone, high pressure liquid around the bubbles in the bubble decreases drastically and rupture. Condensation in the bubble burst and the liquid particle at high speed to fill a hole in this moment has a very strong effect of water hammer and the impact of high frequency against the metal surface, the impact stress of hundreds to thousands of atmospheric pressure, impact frequency can be up to tens of thousands of times per second, serious breakdown when the wall thickness will be. The process of cavitation in a pump is caused by the bursting of bubbles and bubbles in the water pump and the destruction of the over-current components. Water pump cavitation, in addition to the over-current components will have a destructive effect, but also produce noise and vibration, and lead to the performance of the pump down, seriously when the pump will be interrupted liquid, can not work properly.

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