What information do you need to properly select a metering pump?
1. Determine the flow rate of the liquid being measured.
2. Identify the main characteristics of the liquid, such as its chemical corrosiveness, viscosity, and specific gravity.
3. Assess the system's back pressure, which affects the pump’s performance.
4. Consider the suction lift required for the pump to function effectively.
5. Evaluate additional features like analog control, pulse control, flow monitoring, or timer functions, depending on your application needs.
What are the key advantages of an electromagnetic-driven metering pump?
Electromagnetically driven metering pumps have a simple design with only one moving part—the armature shaft. This minimal number of moving parts increases reliability and reduces maintenance. These pumps are well-suited for low-flow and low-pressure environments and perform well even when there are fluctuations in the power supply.
What are the benefits of adjusting the frequency versus changing the stroke length on a metering pump?
By calibrating the pump, you can determine the exact dose per stroke. The total dosage is then calculated by multiplying the dose per stroke by the frequency. Since the dosage is directly proportional to the frequency (e.g., 50% frequency equals 50% dosing), it allows for precise and linear control. With external pulse or analog signals, the dosage can be adjusted from minimum to maximum within just one second. Additionally, this method is more cost-effective compared to motor-driven stroke length adjustments.
How do you use the performance curve of a metering pump?
1. Locate the performance curve that corresponds to the selected metering pump model.
2. Identify the current back pressure value on the chart.
3. Find the correction factor by drawing a vertical line from the back pressure value up to the curve, then reading the correction factor at the intersection point.
4. Divide the required dosing amount by the correction factor to get the actual flow rate in ml/min or L/h.
5. Plot this calculated value on the dosing scale.
Using a ruler, you can then find the appropriate stroke length and frequency settings to achieve the desired dosage.
Proper selection and operation of a metering pump ensure accurate and consistent dosing, making it essential in various industrial and chemical applications.
Ferrule Fitting,Npt Fittings,Hydraulic Ferrule Fittings,Hydraulic Hose Fittings
Jiaxing Master Fitting CO.,LTD , https://www.master-fittings.com