| Pex (Cross-Linked Polyethylene) Specifications |
| PEX is a polymeric material formed by the chemical joining of individual polyethylene molecules in a process called crosslinking. Crosslinking alters the performance of the original polyethylene polymer improving several key properties. |
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| Selecting the Right Fan or Blower for Your Application |
| Sizing of fans and blowers is similar in process to that of pumps, where graphs are commonly used. The performance graph is usually a constant-speed plot with capacity on the X axis and a variety of performance factors on the Y axis. As part of the selection process, a graph of the system is also generated, with capacity as the X axis and head (energy loss in the system) on the Y axis. |
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| Wet Bulb Temperature Equation |
| The wet-bulb temperature, Twet, is a common humidity variable (e.g., Schwerdtfeger 1976, p 50ff.). A wetted thermometer will read lower than the ambient air temperature because of evaporation (but higher with condensation), and that rate of evaporation depends on the mixing ratio. |
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