Category Archives: Technical

Why use HDPE in cooling tower construction?

Corrosion Resistance . . . High Density Polyethylene (HDPE) is the optimum material for cooling tower construction. The material is molded into a totally seamless shell, which will never leak, unlike conventional cooling towers which require many panels, joints, seams, seam gaskets, caulking and hundreds of bolts or other fasteners to maintain the integrity of the [...]
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Selecting a Fan Array System for an Air Handling Unit

This is a great paper that discusses key topics involved in selecting a fan array system. Topics discussed in this paper include VFD Considerations and Electrical Requirements Sound and Efficiency Considerations Vibration Space Considerations Reliability Seviceablity Cost Fan Array System Options Download White Paper
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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. Click Here to read more
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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. [...]
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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
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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) [...]
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