Selection of a diaphragm tank for a booster pump installation

Good day! Help pick up a diaphragm tank for a booster pump installation.
Installation expense - 11 m³/ h, head - 30 m.

Expert Answer

In boosting systems, the installation of a hydraulic accumulator solves the problem of lowering the frequency of turning on the centrifugal pump with small taps. Unfortunately, the passport data of the pumps and the required pressure at the outlet of the membrane tank are not indicated in the text and photo you provided.

Assuming in your photo that the total power of the units used does not exceed 4 kW, the calculation should be based on the fact that the maximum allowable start frequency is less than 20 starts. For your case and factory settings of the accumulator (turning on the pump at 1.1 bar, turning off at 2.9 bar, initial pressure in the tank 0.4 bar), the minimum volume of the membrane tank should be 200 liters.