How to Pick a Centrifugal Pump Part 10: Over-Speeding an HVAC Pump Using a VFD
/Most--if not all--consulting engineers fear under-sizing pump head in a hydronic HVAC application. No one wants the owner to receive ....
Read MoreHow to Pick a Centrifugal Pump Part 9: Over Speeding HVAC Pumps & Motors
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There are times when slightly more capacity or a little more safety factor is warranted in a pump selection. Often we are asked about increasing the speed of the motor above the nameplate rated RPM. There are several things to examine....
Read MoreHow to Pick a Centrifugal Pump Part 8: Motor Speed Considerations
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How does RPM (revolutions per minute) impact pump operation? And what RPM is best suited for hydronic applications? A pump’s RPM or “synchronous speed” is determined by the number of magnetic poles in the motor winding as they interact with...
Read MoreHow to Pick a Centrifugal Pump Part 7: Mechanical Seal Components and Materials
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Part 6 of the “How to Pick a Centrifugal Pump” explained the value of internally flushed seals. One question that our customer service team fields every week concerns the material of construction of ....
Read MoreHow to Pick a Centrifugal Pump Part 6: Internally Vs. Externally Flushed Mechanical Seals
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Whether you install or design hydronic HVAC systems, you are probably aware that pump seals play a vital role in the operation of pumps and owner satisfaction. Unless you’ve ever had the opportunity to get up close and personal with a disassembled pump, the seal functionality and materials may remain a bit of a mystery. Today, we’re going to demystify...
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