Single-stage Double-suction Centrifugal Pump

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Application: DH(V) pump can be used to delivery clear liquids and should not contain solids at temperature below 130C. Air-condition cold water circulation. Water supply and discharge in factories, mines, urban areas. Water supply in power plants, water-conservancy projects as well as irrigation and drainage of farmland.Fire system, ship industry and chemical&oil industry.

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Feature: DH(V) series pump is single stage, double suction, axial split case, volute centrifugal pump. Horizontal or vertrical installation.The motor of the pump can be installed in the left or right .Suction and discharge are horizontally below the pump shaft centerline. when maintenance or service is needed, just open the pump cover and take out the rotation part to repair without dismantle the pipeline and motor.

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Q:Who can tell me such water pump medium flow direction should be what kind of, from left to right, or from right to left, is low into the higher?
In the picture, to the right is the entrance, the left is the exit, the water pump inlet channel section area generally will be bigger than the export.
Q:Pump suction and pressure side road why should vacuum table and pressure gauge, and what role they have?
The water pressure (vacuum) is measured by the vacuum meter. The pressure gauge is used to measure the pressure at the water end, and the difference between the two is the lift of the pump
Q:The role of impeller in water pump
The impeller rotates at high speed so that the centrifugal force is generated by the water, and the vacuum is generated in the middle of the impeller, and the water source is continuously sucked into the impeller to increase the kinetic energy of water and play a role in promoting water.
Q:In the design specifications, for example, the water pump requirement is two. What does that mean? Can 3 pumps be opened at once?
May not。Design is in accordance with the "two prepared" design, opened two units, has been able to meet the water supply requirements. And the electrical control parts are in accordance with the opening of two units, has been unable to meet the opening of 3 power distribution needs. The standby pump is only replaced when the running pump is out of order or needs downtime to maintain the water supply.
Q:Can the water from the fire pump enter the roof fire tank? Why?
Fire water pump water can not enter the roof, fire water tanks, "construction regulations" and "high regulations" clearly defined. The roof fire water tank acts as a temporary fire fighting water for 10 minutes, and the water in the fire pump is supplied directly to the indoor hydrant or sprinkler system. Roof water tank fire water can only be provided by the living pump.
Q:Fire pump control cabinet installation distance, ground height should be how much?
The ground height shall be determined according to the height of the connecting line at the bottom of the control cabinet and the water pump, usually 15~20CM.
Q:What does diving pump 80JYWQ40-15-1600-4 stand for?
Because each manufacturer's label is different, the country although some specifications, but not enforced, so purely from the literal meaning is difficult to explainWe will try to solve the following problems:WQ-- sewage submersible pump80-- outlet diameter of water pump40 - M /h fand flow15 lift M1600 speed, r/min4Kw powerAs for J, Y is rated as sealed form and waterproof gradeI don't know whether it is correct or not
Q:Should the no-load power of the pump be equal to the rated power?
Manufacturers in order to make money, the nameplate marked "1200W", in fact, the maximum power of the motor, only 750W.
Q:37KW how many contactors does the pump need to start directly?
37KW current is about 70 a few A, you can use CJ12-100 contactor, the answer is for reference only, the premise is that the motor limit voltage is 380V.
Q:The role of water replenishing pump in circulating system
There are three ways of constant pressure in water system. 1, the expansion tank constant pressure, this method applies to small and medium water systems, low cost. 2 water pump constant pressure, the role is when the system because the water shortage during the operation, resulting in insufficient pressure, the water supply system can play the role of water pressure. 3 pressure tank fixed pressure, pressure tank fixed pressure at the same time, also need replenishment pump water, the individual feel that the first two kinds of economic reality

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