FAQ About Micro Air Pump/ Vacuum pump | BODENFLO

Table of Contents

micro diaphragm pump

1. How does the noise of the miniature pump arise? How to reduce?


The noise of the pump consists of two parts, one is the transmission and mechanical noise such as the rotation of the motor, and the other part is the noise generated by the friction of the air flowing through the pump cavity and pipes.

The noise can be reduced by adding mufflers in the pipeline. The muffler can only reduce the
latter noise by changing the state of airflow, while there is no way to eliminate the former noise.

The vibration noise after the pump is loaded into the equipment can be mitigated by the vibration damping rubber pads provided by the manufacturer. At the same time, customers can also reduce noise and vibration by adding high-density sponge and other related damping and sound-absorbing materials.

2. Micro pump power size level on the impact of battery life.


In general, the smaller the power of the mini pump, the less power consumption, the more suitable for battery-powered products, the smaller the power the longer the use of the battery. Conversely, the higher the power of the micro pump, the greater the flow pressure and other parameters, the faster the power consumption, the higher the battery storage capacity requirements.

3. When using mini pump for gas sampling, is the vacuum parameter useful?


Yes. In gas sampling, the vacuum parameter determines the efficiency of suction (gas collection) of the mini pump.

4. Is the flow parameter useful when using micro pump for gas sampling?


Yes. In gas sampling, the flow parameter determines the efficiency of the speed of suction (gas collection) of the mini pump.

5. What elements will affect the efficiency of vacuum pumping?


The length and thickness of the pipeline, the resistance of the components in the gas and liquid paths, etc., all affect the pumping efficiency, but these elements are usually fixed.

6. The pump does not respond after the power is turned on.


can be investigated for poor contact with the power plug or power lead wire, wrong power supply voltage input, power supply current limit (use a multimeter to check), resistance (load) is too large and other reasons. Other cases can only contact the manufacturer to return to repair, the need for specific analysis of specific problems.

7. The pump is difficult to start or can not start, and accompanied by strange noise.


Most of the mechanical failure of the motor and pump head, this situation can only contact the manufacturer to return to repair, the need for specific analysis of specific problems.

8. Motor can run, but the speed is slow, and the motor casing overheating, burnt smell:


Generally divided into two cases:

A. Inside the motor into a foreign body, resulting in the motor jammed, can not rotate normally.   

B. is a short circuit in the motor winding group caused. This situation can only contact the manufacturer to return to repair, the need for specific analysis of specific problems.

9. Pumping speed becomes slower. Generally there are several situations as follows.


Generally divided into two situations:
A. Silencer blockage, the gas can not be quickly discharged, resulting in slowing down the pumping speed.
B. Compressed air of too much water or impurities. Into the diaphragm pump air distribution valve after blocking the air intake hole.

10. The greater the flow of the pump, the better?


No, according to the actual situation, choose the appropriate flow parameters is the best choice. Purchase parameters can leave a margin, especially the flow parameters. Because after the pump is connected to the air system, piping, valves and other air components will cause pressure loss and flow depletion.

11. How are the miniature negative pressure pump and positive pressure pump formed and their differences?


The general miniature air pump has two inlet and outlet ports, the inlet port can produce less than atmospheric pressure (i.e. atmospheric pressure) air pressure is called “negative pressure”; in the outlet port can produce more than atmospheric pressure called “positive pressure”; for example, the vacuum pump is often said to be a negative pressure pump, booster pump Inflatable pump is the positive pressure pump.

Positive pressure pumps and negative pressure pumps are very different. For example, the gas flow, negative pressure pump is the external gas is sucked into the pumping nozzle; positive pressure is sprayed from the exhaust nozzle; such as the level of air pressure. In fact, “negative pressure pump”, “positive pressure pump” is mainly from the function and the main use to artificially distinguish. “Negative pressure pump” is mainly used in the vacuum (negative pressure) requirements of the occasion, such as: pumping, gas analysis, gas circulation, gas sampling, vacuum adsorption, indirect suction, etc.; and “positive pressure pump” is mainly used in the need for pump as a power, gas transfer, to The two are commonly used in medical, scientific research, environmental protection, instruments, control, etc.

12. The influence of the parameters of micro air pump/vacuum pump on the price.


Micro vacuum pump, micro air pump, the main parameters are flow, positive pressure, negative pressure (vacuum), etc. The higher the parameters, the higher the cost of workmanship required, the sales price will certainly be correspondingly higher.

13. The common units of mini air pump/vacuum pump are:

Pressure: Pa, Kpa, Mpa, mmHg, mbar, bar, psi

Flow: L/min, LPM, L/M, L/H

14. How to understand the load of micro pump?


In the industry of miniature air pump, “load” actually refers to the resistance and obstruction of the gas in the process of running; it needs the air pump to do work to overcome this resistance; the stronger the ability to overcome this resistance, the stronger the “carrying capacity” of the miniature air pump.

15. What are the allowable ambient temperature and medium temperature of micro vacuum pump?


The working environment of miniature vacuum pump: ambient temperature: 0℃~50℃ (no condensation), the pump should not be exposed to outdoor sunlight, and should work in a clean and ventilated environment. Ambient relative humidity: ≤90%. The working medium of miniature vacuum pump: the gas extracted by the pump must be free of particles and oil, and it is allowed to be rich in water vapor, but no liquid water can enter the pump.

16.The difference between brushless mini vacuum pump and brushed mini vacuum pump.

Advantages of brushless miniature air pump/vacuum pump: long life, no electromagnetic interference, low noise, especially suitable for continuous operation around the clock or frequent start/stop occasions, many functions (PWM, CW&CCW, FG, BRAKE); disadvantages: negative pressure, positive pressure, flow rate and other parameters are smaller than those with brushes; the cost is higher than those with brushes.

Brush micro air pump / vacuum pump advantages: low cost, high motor torque parameters; disadvantages: can not work for a long time, brush micro pump life is shorter than the brushless micro pump life.

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