SIDE-BY-SIDE DECISION WORKSPACE

Pump model comparison

Compare normalized catalog records. Differences shown here narrow the shortlist; the manufacturer-issued curve and material schedule remain controlling documents.

Comparison is a shortlist tool. It puts normalized catalog fields next to each other so you can see where two records diverge: envelope, materials, medium, installation, reference standard. It does not prove that two pumps with the same series name can share a baseplate, a spare impeller or a noise limit.

Add two to four model records from their pages. If a cell looks identical, still ask each bidder for the curve of the offered impeller. Identical text in an index is not identical metal in a workshop.

What each field is allowed to mean

Duty envelope: Min/max flow and head are catalog ranges, often across trims. Your duty point must sit inside the offered impeller curve, not merely inside this rectangle.
Power: Motor kW is a catalog association. Confirm absorbed power, service factor and efficiency class at your duty.
Materials: Listed options are not the bill of materials on the quote. Require a line-item schedule for casing, impeller, shaft, seal faces and elastomers.
Standard: A dimensional or test reference is not interchangeability. ISO 2858 does not make two ISW pumps the same machine.

How to add models

Open a model record from the catalog or a classification node.
Use “Add to comparison” (up to four models).
Open this page to read the side-by-side fields.
Send an RFQ naming the surviving shortlist and the duty point.

Select at least two pump models

Use “Add to comparison” on model records. You can compare up to four models. The notes above still stand if you arrived here from the footer with an empty shortlist.

Browse pump models

Questions buyers actually ask

Why can I not compare ten models?

Past four columns, people stop reading differences and start collecting tabs. Shortlist first with classification and factory evidence.

Does a match on materials mean the quote uses them?

No. Quotes often default to the cheapest listed option. Put the required grades in the RFQ line by line.

Are draft or source-pending models allowed in a comparison?

Only as a hypothesis. Do not send a purchase order against a record that still lacks a dated source and a manufacturer curve.