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Typically, pressure increases as a function of the square of flow increase. Manufacturers of different types of piping publish flow-pressure data about their products. You can use this data to calculate gpm from pounds per square inch (psi).
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Developers of air-movement mechanisms such as fans and compressors must consider the basic relationship between fan or impeller speed in rpm (revolutions per minute) and volumetric air flow in CFM (cubic feet per minute).
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Cold water chillers see widespread application both in industry, commerce and architectural air conditioning. While they are used in predominantly larger venues, their efficiencies are still determined by the simple air conditioning concept of electrical energy-in (kW-hr) to energy-moved (Btu/hr (or Tons).
Read MoreTurbines, both steam and gas (internal combustion) versions, create large amounts of shaft horsepower in a small physical package, especially compared to piston engines.
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There are a number of situations where the length of a pipe must be determined by means other than just measuring it with a ruler or tape measure. One is when the pipe is buried or submerged for much of its length, or otherwise inaccessible. Another might be that the pipe is too long for classic measurement means.
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Sensing hydrostatic or liquid leg head pressure is an accurate and reliable way to communicate the height of the liquid level within a tank. It is based on the principle that water or any other liquid of known specific gravity exerts a given pressure at the bottom that increases as the level goes up.
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Head loss is a common term used to describe two types of pressure loss in a liquid system. The first type is static head loss due to the elevation of part of a pipeline above its source, such as in the high floors of a building. The second type is dynamic head loss.
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Most single-phase 220-volt alternating current (AC) motors are used for residential applications in well-water pumping or air-conditioning applications. Single-phase 220-volt AC motors are really two-phase 240-volt motors, especially when compared to three-phase 208-volt motors and single-phase 120-volt motors.
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Most electric motors, whether AC or DC, fail after time for reasons that may not be electrical in nature. Motors without brushes and commutators such as AC (alternating current) induction motors last the longest because of few moving parts.
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Water head pressure is static pressure caused by the weight of water solely due to its height above the measuring point. The pressure at the bottom of a 40-foot lake or a 40-foot high thin tube would be identical, since only height is involved.
Read MoreStrain gauge load cells are by far the most common type of load cell-based weighing system in 2010. Strain gauge load cell weighing systems convert weights into analog output signals that can be further conditioned to indicate weight in digital meters and control systems.
Read MorePlastic has become a daily part of life. You dispose of garbage in plastic bags, buy children plastic toys, drink out of plastic mugs and store food in plastic containers. Because plastic containers are made from polypropylene, they are porous.
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