Part 1 - Choosing the correct system type
Pump systems generally fall under one of four
types of configuration. Each configuration has its own set of factors to
consider.
- Simple
system. A simple system consists of a single input source and a single
destination. Many pump systems fall under this category, such as a
chemical unloading system, where the pump transfers the chemical from a
chemical truck to a storage tank. Pumps that circulate the chemical back
to the same tank, such as an electroplating system, are also a simple
pumping system.
- Branched
discharge. This is also a fairly common pump system configuration. A pump
is used to move chemicals from a storage tank to various workstations.
Each workstation may be located at a different distance from the storage
tank, so the discharge piping is being branched to supply to the
workstations. In such a system, we have to consider running the pump at
variable speeds to optimize the delivery of the chemicals as needed by the
workstations.
- Pumps in
parallel. This is also a common pump configuration where two or more pumps
are used at the same time to transfer chemicals from the same suction tank
to be processed or to be discharged. Using this configuration allows the
transfer volume to be scaled up as needed. Advanced systems use monitoring
systems to balance the loading between the pumps to ensure the pumps run closest
to the best efficiency point of the pumps.
- Pumps in
series. This configuration is not as common as others. The main purpose of
running pumps in series is to provide a boost to reach a higher pressure
or a greater height. Such a system is used when using a single pump to
achieve the pressure/height is impractical.