Spray Equipment Micro Diaphragm Piston Water Pump

How does a micro piston water pump perform? Can it provide stable pressure to ensure the quality of coffee extraction?

Micro piston water pumps usually have the characteristics of small size, high precision and high efficiency. They can achieve complex operations, such as shunt operation with multiple output channels, by controlling the magnitude of the voltage and using different control strategies. These characteristics enable the micro piston water pump to flexibly and stably operate trace amounts of liquid in microfluidic systems, making it suitable for microfluidic control, including coffee extraction processes.

In coffee extraction, stable pressure is one of the key factors. The micro piston water pump can provide stable extraction pressure by controlling the working speed and frequency of the pump, and adjusting the output pressure of the pump.

force. This allows baristas to more precisely control the coffee extraction process, resulting in better coffee quality and taste.

However, it should be noted that the performance and stability of the micro piston water pump will also be affected by some factors, such as the use environment, medium viscosity, pump maintenance and upkeep, etc. Therefore, when choosing a micro piston water pump, you need to choose products with reliable quality and perform appropriate maintenance and upkeep to ensure its performance and stability.

Technical Specification

Product model	DHBZK68	Voltage	DC12V
Pressure	12bar	Noise	58db
Vacuum	-0.3bar	Lifespan	20000 times
Working temperature	5-55℃	Application	Coffee machine

What are the factors that affect the quality of coffee extraction with a micro piston water pump?

Pressure stability: The micro piston water pump needs to provide stable pressure to ensure the quality of coffee extraction. If the pressure is unstable, it may cause uneven coffee extraction and affect the taste and flavor of the coffee.

Pressure: When extracting coffee, appropriate water pressure is a key factor in extracting soluble substances in coffee. If the pressure provided by the micro piston water pump is too small, the substances in the coffee may not be fully extracted, resulting in a weak coffee taste; if the pressure is too high, it may result in over-extraction, making the coffee taste bitter.

Water flow control: The micro piston water pump needs to be able to accurately control the water flow to ensure the time and manner of contact between water and coffee grounds during the extraction process. If the water flow is not properly controlled, it may result in under-extraction or over-extraction, affecting the taste of the coffee.

Cleaning and maintenance: The cleaning and maintenance status of the micro piston water pump will also affect the quality of coffee extraction. If coffee grounds or other impurities accumulate inside the water pump, it may affect its normal operation, leading to unstable pressure or poor water flow, thus affecting the quality of coffee extraction.

Dimension Drawing

Will micro piston pumps cause cavitation?

Miniature piston pumps may experience cavitation under certain conditions. Cavitation erosion (also known as cavitation erosion or cavitation corrosion) is a phenomenon in which cave-like corrosion damage occurs on metal surfaces in contact with the fluid under conditions of high-speed flow and pressure changes.

In a micro piston pump, if the pumped liquid contains dissolved gas, or the liquid releases gas due to pressure reduction during pumping, these gases may form bubbles inside the pump. When the bubbles are compressed and burst in the high-pressure area, local high-temperature and high-pressure impacts will occur, causing damage to the metal surface of the pump and forming cavitation.

However, it should be noted that the occurrence of cavitation is related to many factors, including the properties of the liquid, pump design and operating conditions. Therefore, in order to reduce the risk of cavitation in micro piston pumps, some measures can be taken, such as optimizing the design of the pump, controlling the operating conditions of the pump, and selecting appropriate liquid media.

Mini Piston Pump Flow Test Curve

How to reduce the risk of cavitation in micro piston pumps

Increase the inlet pressure: By increasing the diameter of the inlet pipe, reducing the length and elbows of the pipe, and optimizing the pipe layout, the inlet pressure of the pump can be effectively increased. This helps reduce negative pressure areas and reduces the risk of cavitation.

Reduce the speed of the pump: Reducing the speed of the pump can reduce the dynamic pressure loss of the liquid and reduce the collision between the fluid and the gas, thereby reducing the risk of cavitation. The pump speed can be controlled by adjusting the pump drive system or using a frequency converter.

Install a gas extraction device: Installing a gas extraction device at the outlet of the pump can effectively extract the gas generated in the pump, reduce gas accumulation, and further reduce the possibility of cavitation.

Install a cavitation valve: The cavitation valve is a device that can automatically discharge the gas corroded into the pump. It can prevent the pump from running in the air, thereby avoiding the occurrence of cavitation. The cavitation valve should be installed at the pump inlet, and should be inspected and maintained regularly to ensure its normal operation.

Reduce the pump operating speed: By reducing the pump operating speed, you can reduce the inlet pressure generated by the pump, thereby reducing the risk of cavitation. You can reduce the speed or install a throttle valve at the inlet of the pump to reduce the inlet pressure.