Q: What is the difference between a diaphragm pump and a peristaltic pump?

A: Diaphragm pumps and peristaltic pumps are both positive displacement pumps. The diaphragm pump circulates the air flow through the reciprocating motion of the diaphragm and the opening and closing of the one-way valve group in the pump chamber, thus generating negative pressure and positive pressure. Advantages: The diaphragm has many optional materials, strong corrosion resistance, large flow and pressure, and is maintenance-free.

Disadvantages: The flow rate has pulses (for methods to eliminate pulses, see the technical seminar section of our official website). The peristaltic pump uses a cam to squeeze a rubber hose to generate suction, similar to the principle of the human esophagus and blood vessels. Advantages: high precision, small pulse. Disadvantages: The flow pressure is limited, and the rubber hose needs to be replaced frequently, resulting in high maintenance and consumable costs.

Q: What are the differences between micro diaphragm liquid pumps and centrifugal pumps?

A: The centrifugal pump works by using the rotation of the impeller to cause centrifugal movement of water. Before starting the water pump, the pump casing and suction pipe must be filled with water, and then the motor is started so that the pump shaft drives the impeller and the water to rotate at high speed. The water undergoes centrifugal motion and is thrown toward the outer edge of the impeller, and flows through the volute pump casing. The pressurized water pipe flows into the water pump.

The micro diaphragm liquid pump relies on a motor to drive the eccentric to drive the rubber diaphragm inside the pump to reciprocate, causing the size of the sealed working chamber formed by the diaphragm and the pump head to change periodically. Therefore, when the working chamber becomes larger, the liquid is in a negative pressure state, and the liquid enters the working chamber through the inlet check valve; when the working chamber becomes smaller, the liquid is in a positive pressure state, and the liquid is spit out of the working chamber through the outlet check valve, and the pump follows this Complete the process of transporting fluid media back and forth.

Self-priming function: It is a characteristic of the pump. It means that when the pump is started, the pump itself can automatically pump out the gas in the suction pipeline and fill it with the liquid to be sent, that is, there is no need to prime the pump before starting.

The micro diaphragm liquid pump has the following characteristics: self-priming function (no need for water diversion from the tank), idling operation (pumping water when encountering water, pumping air when encountering air), small flow rate and low pressure.

Before starting, the centrifugal pump must be filled with water and cannot run idling. It is suitable for liquid output scenarios with large flow and high pressure.

Q:Can a diaphragm pump be used instead of a rotary vane vacuum pump for vacuum adsorption?

A:In some scenarios, a diaphragm pump can be used instead of a rotary vane pump to vacuum the adsorption device:

(1) The working conditions of vacuum adsorption require the air pump to have a large air flow margin to ensure continuous vacuum at the suction cup. Therefore, well-sealed pipelines and joints combined with a diaphragm pump with a high relative vacuum degree are completely acceptable. Suitable for absorbing large appliances.

(2) The adsorption process is continuous. In the case of poor sealing, if the pump is shut down, the vacuum effect will be lost instantly. Therefore, it is necessary to ensure that the pump is always in working condition. The rotary vane pump is in such a working condition that it is similar to blocking the air extraction port. Under high load, the power consumption and heat dissipation are greatly increased.

Diaphragm pumps are different. Taking our C60 air diaphragm pump as an example, the relative vacuum can reach -88kpa, the flow rate is about 18L/min, and it can work normally even when the air extraction port is blocked. Therefore, it is no problem to use the C60 air pump instead of the rotary vane pump in some scenarios, and there is no need for regular refueling and maintenance, and there will be no problems such as high heat generation and high energy consumption.