How to Pick Out an Ideal Pump
To choose a pump which can fit specific liquid well, you should pay attention to the quality of the liquid such as viscosity, gravity, ratio of grain in the liquid and the diameter of grain (max. size solids).
The quantity of transportation would be greatly influenced by some factors: the position difference and level difference of inlet and outlet, the temperature of liquid, and the parts of piping.
Therefore, if you raise one and half feeding quantity of your need, it would be better to extend the life of your pumps and find your ideal pump.

