Keys to Using Pumps In Series

Possible Reasons/Scenarios in Which to Use Pumps in Series:

• When a wide range of flow is required


• When the pumps discharge into a common manifold


• When the system head requirement is greater than can be supplied by one pump


• When system pressure requirements vary

 

Keys to using pumps in series:

• Same flows, heads are additive


• Not limited to identical pumps


• Continuously rising curves are best


• Check literally everything (seal limits, pump pressure limits, etc.)

 

Possible Advantages:

• Maintain high pump efficiency with greatly varying heads


• May be able to use some present equipment


• Space pumps throughout system


• Reduces pipe pressures


• Reduces axial load

 

Possible Disadvantages:

• Multiple pumps may be more expensive


• Larger pumps may offer higher efficiency at design point


• More accessory equipment required