ZX Self-priming Pump, Self-priming Sewage Pumps, Good Performance

ZX Self-priming Pump, Self-priming Sewage Pumps, Good Performance System 1

ZX Self-priming Pump, Self-priming Sewage Pumps, Good Performance

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Loading Port:: Shanghai

Payment Terms:: TT OR LC

Min Order Qty:: 1 unit

Supply Capability:: 400 unit/month

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development of pump energy saving products.Self-priming centrifugal pump, the pump and other pump does not have the self-priming capacity, etc.Such as corrosion resistant mechanical seals and stainless steel material can call some of the chemical, pharmaceutical acid and alkali medium.
Second, the product features

1, the pump with self-priming function, do not need to install the bottom valve in pipeline, only to ensure storage in pump body before work are quantitative liquid can have "a drainage, life-long self-priming" function.So both simplifies the pipeline system, and improved the working conditions.
2, has a compact structure, convenient operation, stable operation, easy maintenance, high efficiency, long service life.
Three, use the product

1) suitable for urban environmental protection, construction, fire control, chemical, pharmaceutical, dyes, and dyeing, brewing, electric power, electroplating, papermaking, oil, mining, equipment cooling, tanker unloading, etc.
(2) apply Yu Qingshui, sea water, chemical liquid medium with acid, alkalinity and with general mushy slurry (medium viscosity 100 mile, or less under the solid content of 30%).
(3) mount a rocker arm sprayer, the water can go into the air, a small drips to spray, is a good tool for farm, nursery, garden, tea garden.
And (4) can be matched with pressure filter of any model and specifications, sending size belt filter to filter the most ideal auxiliary pump.
Fourth, working conditions

Traffic: 3 ~ 500 m3 / h
Head: 10 ~ 80 m
Ambient temperature 50 ℃ or less
Medium temperature is 100 ℃ or less
Medium density of 1.24 or less by 103 kg/m3

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.

Q: What is the minimum continuous flow of a pump?: At'-- the allowable temperature rise of pumping medium,C- pumping medium specific heat, kj/ (kg DEG C);Ho- off dead center lift, M.Minimum continuous flow minimum continuous stable flow and minimum continuous thermal flow and the maximum value in the selection, or use the pump process, the minimum continuous flow process requirements must be greater than the minimum flow rate of the pump, otherwise it will cause the pump cavitation, vibration and noise, so that the pump parts damaged. If the minimum continuous flow the pump can not meet the minimum requirement's process, can install the bypass reflux device or reflux system in the pump pipeline, to ensure that the minimum continuous flow pump.

Q: The distance from the pump button to the ground: After confirming that the fire pump has started running, issue a command signal to the hydrant button to light the green answer light.

Q: Why should I pump the pump before starting the centrifugal pump?: 1., if it is backward flow, it is not pumping;2., if the pump is installed underwater (such as submersible sewage pump), it is not pumping;3. pump is for installation in the form of suction. If no diversion irrigation pump, then the pump is full of air quality, air density is less than water, the pump will not be inside the gas out, the pump pressure will not be far less than the atmospheric pressure, the water will not be pressed into the pump to pump through irrigation formed inside the closed environment, the pump will start water out will cause local vacuum, entrance external water pressure into the pump is in inside and outside differential pressure, complete water movement. (vacuum water diversion is directly through the vacuum pump pumping the air in the pump, resulting in internal and external pressure difference, the external water pressure in the internal and external pressure is press into the inlet of the pump. The principle is the same as the pump. A standard atmosphere of =10m water column.)

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: How can I buy a pump?: Selection principle of pump:1, so that the selected pump type and performance parameters meet the unit flow, lift, pressure, temperature and other requirements, the most important thing is to determine the voltage, the maximum lift, and when the head high reached much traffic.

Q: Is the flow meter in front of the pump or after the pump?: Agree upstairs. Pump should be straight before the paragraph, 15 times the nominal length of the caliber.

Q: Why is the flow of the pump too small will occur cavitation phenomenon?: This is because the impeller of the centrifugal pump rotating speed under the drive of the prime mover, when the valve opening decreases, flow rate is too low, can not be taken away by the friction heat generated by the impeller and the liquid completely, make the temperature of the liquid inside the pump. Thus causing liquid vaporization, forming cavitation. Especially in the power plant, the boiler feed pump is more remarkable. Therefore, when throttling regulation, we should set up recirculation system, increase the output flow of the pump to prevent cavitation. When the feed water rate is reduced to 1/3 of the maximum flow rate, the recirculating gate shall be opened so that the flow of the feed pump will be increased properly to ensure that the liquid temperature in the feed pump does not rise.

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).