Is a digital diaphragm metering pump a type of centrifugal pump?

　　Digital diaphragm metering pumps are not a type of centrifugal pump.

　　Differences between digital diaphragm metering pumps and centrifugal pumps

　　Features:

　　Diaphragm metering pump: continuous and uniform flow, large range, easy to adjust; no self-priming ability; not suitable for high head, small flow; simple and reliable structure; insensitive to impurities, easy maintenance and management; with high-precision metering function, the flow rate accuracy of up to 0.5%. In addition, the digital diaphragm metering pump also has the characteristics of digital control and automation control, which can realize precise flow control and automatic adjustment of the working condition to improve the production efficiency.

　　Centrifugal pump: high conveying pressure, can produce high conveying pressure; wide range of application, can convey a variety of liquids, including clear water, sewage, corrosive liquids, etc.; stable operation, the use of driving device for rotor rotation, can achieve stable operation.

　　Difference:

　　Working principle is different: diaphragm metering pump utilizes diaphragm reciprocating motion to generate pressure difference, inhale and discharge liquid. The working principle of centrifugal pump is to use the impeller rotation and make the water centrifugal movement to work, the liquid will be accelerated and discharged through the outlet of the pump body.

　　Conveying method is different: diaphragm metering pump to quantitative way of conveying liquid, continuous and uniform flow, high precision. And centrifugal pump to flow way to transport liquid, its transport pressure is high, but the transport precision is lower.

　　Structural composition is different: diaphragm metering pump is mainly composed of motor, coupling, worm gear, worm gear, spindle, eccentric wheel, tappet, guide cylinder, diaphragm, check valve and so on. And centrifugal pump is mainly composed of pump body, rotor, impeller and driving device.

　　Working principle:

　　The working principle of diaphragm metering pump is that the motor drives the worm gear through the coupling and decelerates the main shaft and the eccentric wheel for rotary motion, and the tappet is driven by the eccentric wheel to make reciprocating motion in the guide cylinder. Together with the diaphragm, a vacuum is gradually formed in the pump chamber through the action of the check valve, and the suction valve opens to draw in the liquid; when the diaphragm moves forward to the dead center, the suction valve closes at this time, the discharge valve opens, and the liquid is discharged under the impetus of the diaphragm.

　　Centrifugal pump works by rotating the rotor to generate centrifugal force, the liquid accelerated, and discharged through the outlet of the pump body.

　　In summary, digital diaphragm metering pumps and centrifugal pumps in the characteristics, differences and working principle, there are significant differences.