Frequently Asked Question

This is Direct Current. Most miniature pumps on the market use low-voltage DC. A transformer or low-voltage battery is often required to step-down the AC voltage to a suitable level for the micropump, which is normally 3V, 6V, 12V or 24V DC.

A watt is equivalent to one joule per second, corresponding to the power in an electric circuit in which the potential difference is one volt and the current one ampere. A watt is equal to the voltage multiplied by the amperage. This is how your electric company keeps track of how much energy you consume.

1. Make sure you know the requirements for your project, then when looking at options, compare Flow rate, Pressure,Vacuum, and Current.
2. Compare pumpsize and weight.
3. Understand the wattage and voltage that the equipment
4. Make sure that the products have verifiable quality.

There are several factors that determine which model will work best for your needs. These include flow rate, pressure, size, frequency of use (or how often you plan on using it), and what types of diaphragm materials you plan on using it with.

If you’re unsure which model will work best for your application, please click here or contact us so we can help!

Miniature diaphragm air vacuum pump is driven by a motor driven eccentric wheel to drive the diaphragm inside the pump to do reciprocating motion and the pump cavity one-way valve group open and close, circulating driven airflow, therefore generating negative and positive pressure.

Check out this Product page to learn more about the custom range of micro diaphragm air vacuum pump. Check out our catalogs to view models and parameters of miniature pumps.

There are two different types of motors used in these products: brushless DC motors, and brushed DC motors. Each one has its own advantages and disadvantages depending on what kind of application you need it for.

Brushless motor version of the micropump:

• Connect the red wire to the positive pole of the power supply
• Connect the black wire to the negative pole of the power supply

Brushed motor version of the micropump:

• The red dot is connected to the positive pole of the power supply
• The other side is connected to the negative pole of the power supply

Brushless(BLDC) version of the micropumps:

• Advantages: long life, low electromagnetic interference, low noise, especially suitable for continuous operation around the clock or frequent start and stop; many optional functions (PWM, CW&CCW, FG, BRAKE);
• Disadvantages: Negative pressure, positive pressure, flow and other parameters are smaller than the brushed version; the cost is higher than the brushed version.

Brushed version of the micropumps:

• Advantages: low cost, large motor torque and high parameters.
• Disadvantages: can not work for a long time; the life of brushed micro-pumps is shorter than that of brushless micro-pumps; it will interfere with electronic components.

To continue to learn about the difference between the two, click here 

one-way valve / check valve

• Used in pneumatic systems to prevent the flow of compressed air in the reverse direction, to ensure the one-way flow of gas.

Silicone shock-absorbing bracket

• Use in micro-pumps for shock absorption, Flexible installation, and noise reduction.

Filter

• Can filter fixed particles in the gas, to avoid particles into the pump cavity leading to diaphragm wear and affecting the work of the check valve, it is recommended to replace regularly.

Silencer / Muffler/ Noise Reducer

• Intervention air circuit, used to eliminate and reduce the airflow noise brought about by the work of the pump.

Silicone hose

• For gas/liquid transport.

PWM Controller

• Input PWM frequency and duty cycle, using potentiometer rotation to adjust the air flow.

Check out this Product page to learn more about the micropump accessories.

It can output square wave through the circuit (PWM pulse width modulation) and use the signal “duty cycle” to adjust the motor speed and change the output flow of the pump, fast and slow, as you like; it can directly adjust the flow of the pump, completely without valve adjustment, simplifying the air circuit system.

The power supply firstly depends on the output of the mini pump, how much power needs to be output, and how much voltage and current is required.

To start the motor, it needs a large starting torque, so the motor needs a high current at the moment of starting.

In order to ensure the normal operation of the pump, it is recommended to purchase a DC power supply that is 3-5 times higher than the pump current. Otherwise, the pump may not start or even burn up.

Flow rate measured with glass rotameter.