Tips for sizing a booster pump

摘要

1. Take seasons into account. For example, water pressure is usually higher in the winter months and lower in the summer months due to irrigation and cooling tower loads. 2. Calculate the total plumbing fixture load using Hunter's Curve or another approved method. Include the cooling tower load and other miscellaneous mechanical loads in the calculations. The engineer needs to use adequate judgment and should consult the owner on whether the booster should be sized to handle 100% of the capacity or be reduced since the probability of all fixtures operating at the same time is extremely low. 3. Find out the static and residual water pressures from the local municipality. Be sure to include losses from the water meter and backflow preventer when sizing the booster pump. 4. Size hydropneumatic tanks to be large enough to handle low-flow conditions. Remember that low-flow conditions for a hospital are much larger than for an office building, where most of the tenants leave at night. 5. Specify steep curves (diagonal vs. flat curve), which allow the pump to find the optimal flow and pressure condition.