Peristaltic Pump Max Pressure
Flow range:0.0053-6000ml/min
2.Basic peristaltic pump:LabM series
Flow range:0.0053-3100ml/min
3.Industrial peristaltic pump
Speed range:0.1-600rpm
Description
Technical Parameters
The peristaltic pump max pressure is affected by many factors, including the wall thickness of the flexible tube, the material, the sealing of the pump and the pump type. When choosing a peristaltic pump, users should consider these factors according to the specific application scenarios and needs to ensure that the selected pump type can meet the work needs. In practical applications, the design of peristaltic pumps usually has a pressure adjustment function to adapt to the size differences between different manufacturers, domestic and imported pump tubes. In addition, users also need to choose the right pump type and hose specifications according to the specific application scenarios and needs to ensure that the peristaltic pump can meet the work needs.
The peristaltic pump max pressure is affected by many factors, mainly including the thickness of the flexible pipe wall, the material of the hose, and the tightness of the pump. The thicker the wall thickness, the greater the bearing capacity of the hose, the higher the pressure that can be achieved; Good material hoses usually have higher pressure resistance; A well-sealed pump can reduce leakage and thus improve pressure retention.
Specifications
The resistance to be overcome when transporting fluid
Internal resistance of fluid
When the fluid flows inside the pipe, internal resistance will be generated due to the interaction and viscosity between molecules. This resistance is related to the viscosity, density, flow rate of the fluid, and the smoothness of the inner wall of the pipe. The peristaltic pump produces peristaltic waves by squeezing the hose to push the fluid forward in the pipe, so the internal resistance of the fluid is one of the main resistance that the peristaltic pump needs to overcome.
Pipeline resistance
Pipe inner wall friction resistance
When the fluid flows in the pipeline, it will produce friction with the inner wall of the pipeline, forming friction resistance. The size of this resistance depends on factors such as the smoothness of the inner wall of the pipe, the nature of the fluid and the flow rate. In order to reduce this resistance, pipes with smooth inner walls and appropriate materials are usually selected.
Resistance at bending and reducing of pipe
Bends and diameters in the pipe can cause a change in the direction of fluid flow and a change in velocity, creating additional drag. When designing the pipe, the number of bends and diameters should be minimized, or a streamlined design should be adopted to reduce this resistance.
Hose resistance
Peristaltic pumps work by squeezing a hose through a roller or rotor to create a peristaltic wave that pushes the fluid forward. Therefore, the resistance of the hose itself is also one of the important resistance that the peristaltic pump needs to overcome. The material, inner diameter, wall thickness, elasticity and other parameters of the hose will affect its resistance. In order to reduce the resistance of the hose, a hose with good elasticity, proper inner diameter and uniform wall thickness is usually selected.
External additional resistance
In the process of conveying fluids, some external additional resistance may also be encountered, such as resistance at valves, filters, connectors, etc. These additional resistance will further increase the work burden of the peristaltic pump, therefore, when selecting and using these accessories, it is necessary to fully consider the size of its resistance and the impact on the performance of the peristaltic pump.
Method of adjusting speed
Frequency conversion speed regulation
This method is the most widely used speed regulation method at present. Peristaltic pumps usually use a frequency converter to control the speed of the motor, thereby changing the flow rate of the pump.
The advantages of variable frequency speed regulation are wide adjustment range, high speed accuracy, and can meet the needs of different working conditions.
Through the frequency converter, users can easily achieve stepless speed regulation, that is, continuously and smoothly adjust the speed.
Frequency control
Frequency speed regulation is to adjust the motor speed by changing the frequency of the power supply.
This method is suitable for some applications where the requirement of speed regulation accuracy is not too high.
It is important to note that the range of frequency regulation may be relatively limited, and in some cases additional power equipment may be required.
Coil variable resistance speed regulation
Coil rheostatic speed regulation is to change the motor speed by changing the winding mode of the motor coil.
By adjusting the wiring mode of the winding, the resistance of the motor can be changed, and then the speed can be changed.
This method may require specialized electrical knowledge to operate, and the range of adjustment may be limited.
Frequency change speed control
Frequency change speed regulation is to use a variety of speed choices, by switching different frequency change pulley to achieve different pump speed adjustment.
This method is suitable for occasions where speed regulation is frequent but the speed regulation range is relatively small.
Users can choose the right speed pulley according to their needs, and then change the speed by switching the pulley.
Potentiometer speed regulation (for peristaltic pumps with potentiometer speed regulation function) :
Some peristaltic pumps are equipped with potentiometers for speed regulation. Users can adjust the speed of the motor by rotating the potentiometer.
This method is usually intuitive and easy to operate, but the speed range and accuracy may be affected by the design of the potentiometer.
Software speed regulation (for peristaltic pumps with intelligent control functions) :
Some advanced peristaltic pumps are equipped with intelligent control systems, and users can set and adjust the speed through a software interface.
This method provides greater flexibility and accuracy, allowing the user to adjust the speed as needed and monitor the pump's operating status in real time.
When adjusting the speed of the peristaltic pump, users need to pay attention to the following points:
► Ensure power stability: The speed control peristaltic pump usually needs to use a power supply system with high power stability to ensure the accuracy and stability of the speed control.
► Adjust the time properly: When adjusting the speed, the user should adjust the speed adjustment time appropriately according to the actual situation, to avoid too fast or too slow to cause the pump to reduce the efficiency or shorten the life.
► Avoid overload operation: The user should strictly control the load of the pump to avoid overload operation to protect the normal work of the pump.
Regular inspection and maintenance: Regular inspection and maintenance of the speed-regulating peristaltic pump can maintain its good working condition and performance and extend its service life.
Peristaltic pump max pressure and number of rollers
Effect of number of rollers on pressure
Pressure growth trend
As the number of rollers increases, the peristaltic pump compresses the hose more, which usually results in increased pressure on the fluid in the pipe. However, the growth of this pressure is not unlimited, but will gradually converge to a stable value.
When the number of rollers increases to a certain extent, due to the elastic and physical limitations of the hose material, the growth rate of pressure will slow down, and may even reach a saturated state.
Pressure stability
Increasing the number of rollers can improve the stability of fluid pressure. More rollers mean more extrusion points, which can be more evenly distributed on the hose, helping to reduce the pulsation of the fluid during transmission and improve the stability of the pressure.
The relationship between the number of rollers and other factors
► Traffic volume:
Although the number of rollers mainly affects the pressure, it also has a certain impact on the flow rate. With the increase in the number of rollers, the flow rate of the peristaltic pump usually increases gradually, but the growth rate will gradually slow down and become stable. However, flow is less sensitive to the number of rollers than pressure.
► Hose material:
The material and durability of the hose is crucial to the selection of the number of rollers. Different materials of hoses have different elasticity and wear resistance, so when selecting the number of rollers, it is necessary to ensure that the hose can withstand enough extrusion without breaking or excessive wear.
► Fluid characteristics:
Factors such as the viscosity, corrosiveness, and solid particles of the fluid will also affect the selection of the number of rollers. For example, for fluids with high viscosity or fluids containing solid particles, more rollers may be required to provide sufficient extrusion pressure to overcome flow resistance.
Practical application considerations
Demand matching
When selecting the number of rollers for peristaltic pumps, it is necessary to match them according to specific application scenarios and needs. For example, when high pressure output is required, the number of rollers can be appropriately increased; When a large flow output is required, although increasing the number of rollers also helps to improve the flow rate, it may be more necessary to consider the combined impact of other factors (such as speed, hose inner diameter, etc.).
Equipment maintenance
Increasing the number of rollers may increase the complexity and maintenance cost of the equipment. Therefore, when selecting the number of rollers, it is necessary to simplify the device structure and reduce maintenance costs as far as possible under the premise of meeting application requirements.
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