Parallel or series pump operation is very important for selecting a suitable pump, because they affect on the pump operation.
- Parallel or Series pump operation (parallel operation)
- When pumps operate in parallel, clearly specify “Auto Start required”
- Pumps that have stable head/flowrate curves (continuous head rise to shutoff) are preferred for all applications and are required if parallel operation is specified. If parallel operation is specified, the head rise from rated point to shutoff shall be at least 10 %. If a discharge orifice is used as a means of providing a continuous rise to shutoff, this use shall be stated in the proposal. {API 610}
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| Parallel operation |
As a result you could comment on the vendor offer as follows:
- If parallel:
- Pumps shall have stable head/flowrate curves (continuous head rise to shutoff). In parallel operation, the head rise from rated point to shutoff shall be at least 10 %. If a discharge orifice is used as a means of providing a continuous rise to shutoff, this use shall be stated in the proposal.
- Electrical motor shall be sized at end curve because pumps are auto start.
- If series:
- Pumps that have stable head/flowrate curves (continuous head rise to shutoff) are preferred.
