QJ Multistag Submersible Centrifugal Water Pump

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Shanghai
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1 set
Supply Capability:
1000 set/month

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Product Description:

1. Product overview :

 QJ series deep well submersible waterpumps are widely used in farm irrigation, sprinkler irrigation, getting water from well, water supply and drainage system for industrial and civil building, water diversion project in hilly and mountain areas water drainage project in at low-lying areas, water supply and drainage in urban and rural's mining enterprisesand various ther kinds of water conservancy facilities. Its features are that the Motor and pump are assembled into a whole, so that it is simple in structure, convenient to assemble and disassemble, easy to use and maintain safe to operate. Otherwise, it covers an small area and does not pollute water.

 

2. Operation parameters :

(1). Flow range : 10-500 m3/h

(2). Lift range : 10-600m

(3). Applicable well diameter : φ175-φ400mm

(4). Diameter scope:φ32—φ203mm;

(5).Temperature range: -15—100°C.

 

3. QJ using condition:

(1) 380V voltage deviation is no more than ±5%,frequency is 50HZ, three-phase power deviation is no more than ±1%.

(2) Motor cavity must be filled with water.

(3) The first stage impeller of the pump should be more than 2mm below the moving water surface,  pump unit should be less than 70m below the static water level.

(4) The distance from the motor bottom to well bottom must be more than 3m.

(5) Water temperature should be no more than 20°C.

(6) Sand content of the water ( by mass) should be no more than 0.01%.

(7) PH value of water 6.5-8.5.

(8) Hydrogen sulfide content of the water should be no more than 1.5mg/L.

(9). Chloride ion content of the water should be no more than 400mg/L.

(10). Water yield of water source should ensure the requirements of pump continuous working.

 

4. Material

Impeller: Cast iron HT200,or stainless steel

Pump bowl: Cast iron HT200,or stainless steel,such as ss304 ss3016

Pump shaft : Cold-drawn steel with chrome plating,or stainless steel SS304 SS316

Motor Seal: Rubber O-ring seal,mechanical seal

Motor regulating sleeve: Rubber

 

5. FAQ

(1).  Can I get trained on CNBM products?

Yes, we provide training courses in our factory (products, general and specific pump technology, hydraulics, and practical applications). Please consult your sales manager or get in touch with our headquarters for more information.

(2).  Are your pumps cheaper than those of your competitors?

CNBM aims to give its customers the highest standards of quality and service and delivery times, all at a reasonable price.

(3).  How long is your warranty?

Unless otherwise expressly authorized in writing, by specifying a longer period or different conditions, CNBM states that, for a period of twelve (12) months from delivery date, all Products supplied are free from defects in materials and workmanship, and conform to the applicable specifications. Either the delivery documentation or the invoice must be provided to prove delivery date. In absence of such documents, the production date appearing on the product label may suffice.

(4) Are your pumps cheaper than those of your competitors?

CNBM aims to give its customers the highest standards of quality and service and delivery times, all at a reasonable price.

(5) Do you have self-priming pumps?

Yes, our product portfolio also includes two ranges of self-priming pumps: self-priming electric pumps and self-priming side channel pumps.

(6) Is it really necessary to fit a bleed valve for the boxes?

It is always best to have a bleed valve as the gas produced by the fermenting sewage is potentially hazardous.



QJ Multistag Submersible Centrifugal Water Pump

QJ Multistag Submersible Centrifugal Water Pump


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Q:What does "efficiency" mean in a water pump catalog?
The efficiency of the water pump nameplate refers to the maximum efficiency that the pump can reach at the rated speed
Q:Attention should be paid to the use of pumps?
7 water pump and pipe interface must be sealed, because if there is debris access, then the pump will cause damage to the interior. 8 for the water pump bearing is also the focus of inspection, use up to check whether the bearings wear,
Q:Fire pump and shower pump flow head selection, high resolution.
2, the volume is greater than 10000 is less than 25000, the minimum water consumption of indoor fire hydrant is 15L/s
Q:No negative pressure water supply equipment, both the main pump and auxiliary pump, power is not the same
Non negative pressure variable frequency water supply means no negative pressure superposed water supply equipment. When running, it is connected directly to the water supply pipe. Always test the pressure of tap water pipe network and water supply pipe network pressure control system, when the water pressure is lower than the pressure required by the user, the frequency conversion device based on water automatically control the pump speed through the steady flow compensator of water balance, maintain a constant pressure water supply. In the multi pump system, the control system can automatically dispatch the water pump according to the water consumption. It can balance the working time of the pump and ensure the pressure of the water supply. When the water supply pressure satisfy the required pressure, the system automatically stops the pump by the external water supply pipe network directly. CJWFG-DYG non negative pressure superposed water supply system:
Q:What should I pay attention to when buying a pump?
There are hundreds of water pump manufacturers in China, some of the family owned private enterprises are assembled in some areas, and the quality of the products is very good and bad, which makes it difficult to choose and buy. The main points are as follows:First, according to the required flow, lift, shaft power, efficiency, the necessary cavitation margin (or suction) and the use of conditions, the initial determination of the pump type, name, select the rated value and the required parameters of the same pump.
Q:What are the failures and causes of the replacement of the fuel pump assembly?
Gasoline pump is the gasoline from the gasoline tank suction and the gasoline tank has a certain pressure, thereby, it overcome the resistance of the pipeline, pipeline and fuel filter into the carburetor float chamber or electronically controlled injection engine in the guide frame.
Q:Difference between pump and compressor
A pump is a machine that transports liquids or pumps liquids. It transfers mechanical energy or other external energy of the prime mover to the liquid, increasing the energy of the liquid. The pump is mainly used to transport water, oil, acid and alkali liquid, emulsion, suspension emulsion and liquid metal, and also can transport liquid, gas mixture and liquid containing suspended solid. Pump can usually be divided into three types of displacement pumps, power pumps and other types of pumps according to the principle of operation. In addition to classification according to the working principle, it can be classified and named according to other methods. For example, according to the driving method can be divided into the electric pump and the turbine pump; according to the structure can be divided into single-stage pump and multistage pump; use can be divided into the boiler feed pump and the metering pump; according to the nature of transmission fluid can be divided into water pump, oil pump and mud pump etc.. In accordance with the non axial structure, can be divided into linear pumps and traditional pumps.
Q:What does "anti pump" mean in pump operation?
The working process of the main oil cylinder pushing back and forth against the pump when the S valve (C valve or valve or gate valve skirt) reverse swing, so the piston suction concrete cylinder is in the ash conveying pipe is exactly opposite is the pump suction pump (hopper is concrete and push into the hopper, the desizing)
Q:Is the centrifugal pump large or small?
Centrifugal pump, the smaller the better the cavitation.1, centrifugal pump cavitation less, anti cavitation performance is better, the pump cavitation is called the necessary cavitation margin or pump inlet dynamic pressure drop, the smaller the better. Generally speaking, the pump cavitation is the need for cavitation, the pump inlet pipe said effective cavitation margin, that is, the device cavitation margin. For a given pump, at a given speed and flow rate required NPSH is called pump necessary NPSH, also called NPSH, is required to achieve the performance parameters of the pump cavitation, the internal flow and the centrifugal pump is composed of pump head itself, its physical meaning is that liquid drop in pump inlet pressure part degree, is to guarantee the pump cavitation does not occur, with surplus energy exceeds the vaporization pressure head at the inlet of the pump unit weight of liquid. The cavitation must be independent of the device parameters. It is only related to the parameters of the inlet of the pump. These parameters are determined by the geometric parameters at a given speed and flow.
Q:Working principle and structure of external gear pump
External gear pump is the most widely used gear pump, the general gear pump usually refers to the external gear pump. Its structure as shown in the diagram, there are mainly driving gear, driven gear, pump body, pump cover and safety valve and so on. The seal space of pump body, pump cover and gear is the workshop of gear pump. The wheel shafts of the two gears are respectively arranged in the bearing holes on the two pump cover, and the driving gear shaft extends out of the pump body and is driven by the motor to rotate. The external gear pump is simple in structure, light in weight, low in cost, reliable in operation and wide in application. When the gear pump works, the driving wheel rotates with the motor and drives the driven wheel to rotate

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