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[ pdf ] Positive Displacement Principle of Operation

Positive Displacement Principle of Operation Download
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Topic under  Displacement Measurement
Source: info.smithmeter.com 
File size: 312.72 KB
File type: pdf
Last download on: Thu Apr 12, 2018 04:35:23 AM
Short Desciption:
These meters are of the rotary positive displacement type. The accurately-machined housing contains a rotor which revolves on ball bearings and carries evenlyspaced blades. As liquid fl ows through the meter, the rotor and blades (vanes) revolve about a fi xed cam causing the blades to move outward. The successive movement of the blades forms a measuring chamber of precise volume between two of the blades, the rotor, the housing, the bottom, and the top covers. A continuous series of these closed chambers is produced for each rotor revolution. Neither blades nor rotor contact the stationary walls of the measuring chamber.

Summary:
One of the outstanding features of the Smith meter principle is that the fl ow is literally undisturbed while it is being metered. Energy is not wasted by unnecessary hydraulic bending of the liquid.
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