KQSN series horizontal open in single stage double suction centrifugal pump

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Product overview

KQSN open double suction pumps in series are widely used in water plant and urban water supply project, water conservancy irrigation, metallurgy and steel mills, central heating, petrochemical plants, paper mills, oil fields, power plants and power stations, airport construction, the characteristic, central air conditioning system, sugar mill, brewery, chemical plants and other industrial and mining enterprises, and large factories, mines, fire fighting system water supply, etc.

Application field

Suitable for large flow and a head of water supply and water applications. Urban water supply and drainage, urban water supply; The central heating system, water supply and drainage; Iron and steel metallurgy enterprises, petrochemical refineries, paper mills, oil field, thermal power plants and power stations, airport construction, the characteristic, textile mills, sugar mill, chemical plant, power plant, water supply and drainage; Factories, mines, water supply, air conditioning system of water supply, fire fighting system of farmland drainage irrigation and various water conservancy project.

The working conditions

Speed: 990148 0 and 2960 r/min

Voltage: 380, 6 kV and 10 kV

Entrance diameter: 150-600 - mm (flange size accord with GB/T17241.6-1998)

Flow range: 68-3975 - m after/h

Lift range: 6-230 - m

Liquid temperature range: the highest temperature of 80 ℃ to 120 ℃ or less, the environment temperature 40 ℃ or less commonly

Allows medium: water, such as medium for other liquid, please contact with our company


Q:Fire control center manually start the fire pump directly, multi line control, called straight up line NHKVV-7*1.5, my understanding is: straight line from fire control center
The vertical line NHKVV-7*1.5 is the remote starting line of fire controller to fire pump room.
Q:How many square cables does the submersible pump for 7.5KW need?
I=P/ (1.732Ucos phi) =7.5/ (1.732X0.38X0.85) =13A (calculated according to three-phase city power, power factor 0.85).
Q:Working principle and structure of external gear pump
The principle of the gear pump, gear pump structure consists of two gear mesh together with each other, and composed of pumps known as gear pumps. It relies on the gear teeth meshing space change in volume to transport the liquid, it belongs to the rotary pump, also can be considered as a volume pump. There are many kinds of gear pumps. According to the meshing mode, it can be divided into external gear pump and internal gear pump. According to the tooth shape of gear, it can be divided into positive gear pump, helical gear pump and herringbone gear pump.
Q:What is the liquid pump? What are their categories? What are their strengths and weaknesses?
The liquid pump can be filled with oil, water and chemical medium. The gas drive range of the liquid pump is 1 to 10bar (14.5-145psi). The bottom piston is controlled by a two position four pass pilot valve.
Q:What's the difference between a concrete pump and a concrete pump truck?
Concrete pump is a pumping machine used in the field, while the concrete pump truck is a truck mounted pump.
Q:Excuse me, what is the water pump from the lotus root?
The pump is automatically coupled by the self coupling device to move downwards along the guide rod to the position, thereby achieving the simple and convenient effect. There's no need to jump into the septic tank when it's time to repair.When you buy a sewage pump, a professional person will ask you what kind of installation you need!
Q:What's the difference between non negative pressure and variable frequency water pump?
When peak water is used, the fluctuation of water pressure will be the same for customers! Because the key to the fluctuation of hydraulic pressure is the flow rate of the pump and the lift of the pump. As long as the flow of the selected pump is large enough, the tank is large enough, the lift head is suitable, and the pressure fluctuation is relatively small. And the selection of non negative pressure and frequency conversion pump group is not directly related. If the municipal tap water pressure and water sufficient (large enough diameter), the use of non negative pressure is better. If the municipal tap water pressure and water shortage, you can only use the frequency converter pump + water tank, no negative pressure can not be used.
Q:If the calculation of the required pump flow is 45, lift 110, and the actual pump flow 100, head 125, what will happen in operation? Can I use it properly?
First of all, the performance curve of the centrifugal pump is similar to the track of the train, and the train can not run away from the track.Secondly, the performance curves of centrifugal pump mainly include flow head curve, efficiency flow curve, power flow curve. When the pump is ready, the curve is fixed. In practical application, after determining the flow rate, the corresponding lift head, efficiency and power (relative to density) are determined. General requirements for centrifugal pump operating in the vicinity at the highest point of efficiency, the efficiency of the flow curve is similar to parabola, so if the actual operation condition deviated from the rated point, whether large or small, will cause the decline in pump efficiency (generally rated value is less than 15%), increased operating costs.
Q:How does the centrifugal pump pump and cut the pump?
Check the motor, pump and fasteners in good condition; whether the lubricant is added or not;Disc dynamic coupling, whether or not stuck phenomenon;Open the inlet valve, remove the gas in the pump or pump the gas out of the pump;
Q:What are the uses and precautions of magnetic pumps?
5, after the motor starts, slowly open the drain valve, until the pump into the normal working state, and then discharge valve to the desired opening;6, before the pump stops working, should first close the exhaust valve, and then turn off the suction valve.

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