Archives :: Technical & Practical
August 15, 2008
Gate Gate valves are designed to operate fully open or fully closed; When fully opened, there is very little pressure drop across the valve, and when fully closed there is good sealing against pressure. With the proper mating of a disk to the seat ring, very little or no leakage occurs across the disk when the gate valve is closed. Gate valves open or close slowly, which prevents fluid hammer and...
August 15, 2008
As fuel prices continue to rise, energy management is everyone’s business Market trends suggest that the demand for energy resources will rise dramatically over the next 25 years with the global demand for all energy sources forecast to grow by 57% and the U.S. demand for all types of energy expected to increase by 31% (see Figure 1). By 2030, it is expected that 56% of the world’s energy use...
July 15, 2008
Vacuum is any system of reduced pressure, relative to local (typically atmospheric) pressure. Achieved with a pump, vacuum systems are commonly used to: Remove excess air and its constituents Remove excess reactants or unwanted byproducts Reduce the boiling point Dry solute material Create a pressure differential for initiating transport of material Liquid-ring and dry pumps offer the most advantages for...
June 15, 2008
Applications Dehumidification by cooling or dessication has a variety of applications, including: Preventing moisture regain. Nearly all materials have some affinity for moisture based on surface characteristics and the amount of surface exposed to humid air. Moisture regain occurs when moist particles stick together. Preventing condensation. Air holds water vapor in proportion to its temperature. Cold...
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