Submerged Water Pump with High Quality (QDX7-18-0.75B)

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Basic Info. of Submerged Water Pump with High Quality (QDX7-18-0.75B)

Model NO.:QDX7-18-0.75B

Performance:Drainage Pump

Start Up:Electric Pump

Media:Water Pump

Application:Submersible Pump

Type:Blade Pump

Material:Stainless Steel

Power:Electric

Structure:Single-stage Pump

Theory:Centrifugal Pump

Assembly:Liquid Pumps

Industry:Household & Agricultural Pump

Export Markets:Global

 

Additional Info. of Submerged Water Pump with High Quality (QDX7-18-0.75B)

Packing:Color Carton

Standard:CE, SGS

Production Capacity:30000PCS/Year

Product Description
QDX-B Series Submerged Water Pump

 

Application and Installation of Submerged Water Pump with High Quality (QDX7-18-0.75B)

They are recommended for pumping clean water without abrasive particles and liquids that are chemically non-aggressive to the materials of which the pump is made. Mainly used for well pumping, river pumping, farm irrigation, water supply, drainage in breeding industry.

 

Working Condition of Submerged Water Pump with High Quality (QDX7-18-0.75B)

Liquid temperature up to +40oC
Ambient temperature up to +40 oC
Trans medium PH  6.5-8.5
Operating depth: 5m

 

Materials of Submerged Water Pump with High Quality (QDX7-18-0.75B)

Motor housing:  SS
Impeller: Aluminum
Motor wire: Copper or Aluminum
Suction strainer: Cast iron or SS
Mechanical seal: Ceramic - Graphite
Shaft: CS 45# or SS

 

Motor specification of Submerged Water Pump with High Quality (QDX7-18-0.75B)

2-pole induction motor
Insulation Class: E
Protection: IPX8
Single-phase with capacitor and thermal overload protection

 

Model Instruction of Submerged Water Pump with High Quality (QDX7-18-0.75B)

QDX1.5-17-0.37A(F)
(F): With float switch.
0.37: Rate power(kw)
17: Rated head(m)
1.5: Rated flow(m3/h)
B: SS motor housing
QDX: Model code, and no "D" means three-phase

 

FAQ

Q: Are your pumps protected against dry running?

A: No, unprotected centrifugal pumps are not generally designed for dry running. It is important to give us or your dealer as much information as possible about the system in which the pump is used. Inlet pressure, the type of liquid to be pumped, together with relative density, viscosity and temperature, for example, are required in order to allow CNBM to recommend the right pump with the right gaskets for a long operating lifetime.

Q: How can I get trained on CNBM products?

A: 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.

Q: Are your pumps cheaper than those of your competitors?

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

Q: Do you have self-priming pumps?

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

Q: Is it really necessary to fit a bleed valve for the boxes?

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

Submerged Water Pump with High Quality (QDX7-18-0.75B)

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Q:About how to calculate the pump installation height?
See the design manual, town water, volume P312This formula is: NPSHA = HgHzhsZs > NPSHRAccording to the actual installation of NPSHA pump cavitation can provideThe pump NPSH provides NPSHR pump samplesAtmospheric pressure Hg pump installation siteHz liquid under certain temperature saturated steam pressure.The head loss of water pipe HsThe installation height of ZsIt is worth pointing out that, with regard to Hz, with temperature related, and some problems are not given temperature, and that value is also very small, in the calculation should be able to ignore (0 degrees C, 0.06mH2O).And atmospheric pressure, we usually use 10mH2O, in fact, and altitude also related. When the altitude is 0, it is 10.3
Q:What is the water pump population pre rotation, what harm?
The turbulence formation flow entrance, the flow direction is complex, impact, vibration, easy to damage the device before; if there is no water pump entrance pre swirl design will affect the safety and service life of equipment.
Q:25KW what is the lift of the pump?
Give you a formula for estimating the power of a pump:N=Q (L/s), *H (m), /102/ (0.6~0.85), /0.85Explanation is:N, the power unit is kW (kW)Q, flow, in units per liter (L/s)H, the lift is m102 is 1000/g, G, that is gravity acceleration, is a unit conversion0.6~0.85, the efficiency of the pump, the general flow of large values, small flow of small value;0.85, power factorIn addition, there are some general power pump module, since there are: 1.1kW, 2.2kW, 3kW, 4kW, 5.5kW, 7.5kW, 11kW, 15kW, 18.5kW, 22kW, 30kW, 37kW, 45kW, 55kW, 75kW, 90kW, 110kW, 132kW......And generally there is no 25kW pump.
Q:Why should we pump water into a pump when the country uses a pump to pump it?
Because the leather cushion there is not completely sealed the water pump wall, there is a small gap in the contact, so that the piston up and down the air connection, air pressure is equal, can not pump water.And then add water to the gap closed, such upward pull the piston to make the piston below the space increases, but the air and can not go to fill the air pressure decreases, less than atmospheric pressure, only through inhalation of water to supplement water, which is forced by atmospheric pressure wells the water through the pipe and then rise to the pump. So it can be pumped up.
Q:Why does the pump head decrease when the pump flow rate increases?
When the power increases to a certain extent, can not be increased, so when the flow increases, the head can only be reduced
Q:When the pump is connected in parallel, will the head and flow change?
Depends on how you do it.If you have a pump, the original network is the same, you add a pump, the result is the head and flow increases, the efficiency also changed, increase the number of head and flow, depending on the network characteristics, network characteristics such as steep increase, economy is also poor, which is not recommended. In fact, the actual flow of two pumps plus the actual lift equal, the problem is that the head, flow point of operation has changed.If it is new design, according to the required flow calculation of the required head, according to the head, half of the flow to select the pump, that is, two pumps flow volume, lift equal.
Q:What is called soft start of water pump?
Close the outlet valve of the pump, open the inlet valve, and can ensure that the water pump "self filling" (the liquid level is higher than the pump inlet pipe under the condition of the water pump start procedure is: to start the motor, to the normal operation of the motor, slowly open the outlet valve, the current gradually increase. But in the unattended operation (valve), and automatically pump, and pipeline diameter and length (in the pipeline water quality will be great), such as the motor start fast, to quickly promote the quality of water (as the train will soon accelerate acceleration), will make the motor starting current is large, causing the motor to trip and the damage of mechanical and electrical. Soft start (soft starter added in the circuit) - that is, slow motor speed, can overcome the above situation.Stop the pump normal order is: close the outlet valve, then stop the motor, such as unmanned operation, the outlet valve is not closed, when the pump stops suddenly, the water inside the tubes (especially vertical pipe), water will quickly turn back, so when the check valve suddenly closed, the fast flowing water suddenly stop by the inertial impact that produces "water hammer" effect and damage of pipeline system, using the "soft stop" should, in the circuit is connected with the soft stop device.
Q:What are the conditions for the series and parallel connection of the pumps?
Water pumps in series require equal flow, and the latter should be able to withstand the pressure of two pumps and.The parallel pump requires the pump with equal lift head, and the outlet pipe in parallel shall be chosen according to the flow rate of two pumps.
Q:The diving pump in the aquarium stops and stops on the goldfish
Generally do not close the filter at night, at 56 in the morning when the most likely hypoxia. The sick fish are all fished out. Fast infection
Q:Pump performance parameters have three sets of data, how to understand the flow, lift, flow speed
1, the head is composed of a water pump design decisions, such as motor speed, power, blade shape; the flow is determined by the motor power and lift, the same power lift higher flux is small; velocity determined by flow and pipe section with a pump pipeline section greater velocity.2, the pump is to transport liquid or liquid pressurization machinery. It will be the prime mover of the mechanical energy or other external energy transfer to the liquid, the liquid energy increase, mainly used to transport liquids including water, oil, alkali liquid, emulsion, suspension emulsion and liquid metal, but also transport liquid, gas mixtures and liquids containing suspended solids. Pump performance of technical parameters are flow, suction, lift, shaft power, water power, efficiency, etc.; according to the different principles of work can be divided into volume pumps, vane pumps and other types. Displacement pump is to use its studio volume changes to transfer energy; vane pump is to use the rotating blade and water interaction to transfer energy, there are centrifugal pumps, axial flow pumps and mixed flow pumps and other types.

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