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Category Archives: Technical
How Hydronic System Components Really Work
This is an article written by Bell & Gossett for Oil Heating Magazine. It goes into detail about the components of a hydronic system and discusses how they work. A must read for anyone interested in understanding the basics of hydronic system design.
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Examining Causes of Pump Vibration as Featured in HPAC Engineering
Many vibration problems are a result of interactions among a system’s pump, motor, fluid, piping, and structure. This interactive relationship requires a systems approach to vibration analysis, rather than the investigation of individual components. This article discusses the cause of vibration, how is it measured and described, its limitations, and many other vibration related issues. [...]
ESP-Plus: Spotlight on Pump Curves
Not all pump selection programs are created equally. The algorithms used to select pumps and generate curves need to be very sophisticated. ESP-PLUS® uses a three curve interpolation method developed by ITT. Unlike some other pump selection programs on the market, you can be assured the results from ESP-PLUS are very accurate. Visit ESP-Plus Online
Manifolding Condensate Return Vent Lines
We are often asked if it is necessary to run separate vent lines for each condensate return unit in a multiple unit system. Large systems or multi-zone systems often make individual venting impractical. There are no industry standards for sizing condensate return vent manifolds, but ASME Controls and Safety Devices for Automatically Fired Boilers (CSD-1) [...]
ESP-Plus: Sizing an Expansion Tank
When Bell & Gossett redesigned the ESP-PLUS® tank selection program a few years ago, they sought comments from users about the program. The feedback came back in two camps. One group wanted a simpler program where the engineer could just enter the basic sizing parameters like other manufacturers’ programs. The other group wanted even more [...]
Selecting a Fan Array System for an Air Handling Unit