【 Weak current College 】 metering pump selection and frequently asked questions-Power By 【 China power house network 】

When you run the dosing system, focus on the following matters:

A. vote little pressure

B. stroke frequency

C. Xisheng height

D. altitude

E. chemicals corrosive



When metering pump export to atmospheric pressure, how to improve the accuracy of repeat dosing pump?

In metering pump valve installation valve spring can improve repeat measurement accuracy, but the most effective approach is to install one at the end of the pipeline back pressure valve.



How to adjust the back pressure valve?

1. never exceed metering pump maximum operating pressure.

2. when the metering pump suction side pressure of the pump discharge end pressure at least better than high suction side pressure 1bar



How to choose the appropriate pulse damper volume?

Use of metering pump every stroke of capacity (ml) multiplied by the 26, can come to reduce the 90% ripple the required pulse damper minimum volume (ml).



How to set the pressure of safety valve?

Relief valve pressure can metering pump rated working pressure range adjustment does not allow more than metering pump maximum operating pressure. Safety valve designed to prevent the metering pump pressure. For example, if a metering pump maximum operating pressure is the pressure 3bar, relief valve should be set to 3bar, or lower to ensure the normal work of metering pump is 0. Overpressure is led metering pump one of the main causes of damage.



If transportation of liquid water is not, how to calculate the height xisheng?

The metering pump rated xisheng height divided by the proportion of measuring liquid.



In what circumstances used irrigation suction fluid?

You can apply custom irrigation suction fluid:

1. measurement of volatile liquid easily;

2. metering a large proportion of liquid;

3. When you need a higher stroke frequencies;

4. metering pump when working in high altitude;

5. when the application requires a larger tank, and rely on metering pump self-priming not feasible.


In the pump head metering liquids, you must consider what factors?

Major consideration liquid viscosity, density, vapour pressure and temperature.