Vertical Multistage Pumps Explained: How CDL, CDLF and CDM Pumps Work
What a vertical multistage pump is, why stacking impeller stages gives high pressure in a small footprint, and where CDL, CDLF and CDM pumps are used.
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Latest articles
Pump knowledge, maintenance advice and news from CNP Pump Global.
Booster Pump Systems: How to Size One for a Building or a Plant
Booster sets keep water pressure steady on every floor. This guide shows the data you need and the checks our engineers make before recommending a booster system.
Read article →Fire-Fighting Pump Sets: Main, Jockey and Booster Pumps Explained
A fire pump set is more than one pump. Learn the role of the main pump, the jockey pump and the controller, and what information a supplier needs from you.
Read article →How to Read a Pump Curve: Duty Point, Efficiency and NPSH
A pump curve tells you what a pump will really deliver. Learn to find the duty point, check efficiency and avoid the most common selection mistakes.
Read article →Ordering Spare Parts Right First Time: Seals, Impellers, Bearings and Couplings
Wrong parts mean delays and downtime. This checklist shows the information to collect so that CNP can identify the exact spare part for your pump.
Read article →From Client Data to Detailed Report: How CNP Designs and Verifies Pump Selections
Every CNP selection starts with your data and ends with a documented report. Here is how our engineering team collects information, designs the selection and verifies the result.
Read article →Reverse Osmosis Feed Pumps: Selecting for 8 m³/h at 110 m
High head at low flow is typical of RO feed duty. See how a selection for 8 m³/h at 110 m was designed, ranked and documented.
Read article →Designing for 60 Hz: How Supply Frequency Changes Your Pump Selection
A pump rated at 50 Hz behaves differently on a 60 Hz supply. This example shows a 45 m³/h at 35 m selection made on 60 Hz catalogue data.
Read article →How to Read a Pump Datasheet: A CDL32-40-2 Walk-Through
A datasheet condenses a pump into two pages. Learn what each block means using the CDL32-40-2 as a worked example.
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