ENHANCED INTEGRAL ORIFICE ASSEMBLIES PROVIDE HIGH ACCURATE SMALL LINE MEASUREMENT
Gregory Livelli
Abstract:
By combining integrated electronics with integral orifice technology, these flowmeters are capable of measuring three process variables in one device: DP, static pressure, temperature, and then dynamically compensating mass flow rate. With built in flow computers for dynamic compensation, integrated flowmeters eliminate the errors commonly found in non-dynamic compensated flow measurement. This design eliminates tubing, valves, adapter unions, transmitter mounting, excessive welding and leak points, therefore reducing installation time. Traditional meters measure a single process variable, where multivariable transmitters simultaneously measures all process variables necessary for calculating either pressure and temperature compensated gas flow or temperature compensated liquid flow. When calibrated in a factory laboratory, the mass flow rate accuracy over an 8 to 1 flow turndown is 0.75% of reading for liquids and 0.85% of reading for gas or steam. Integral orifice flowmeters enhanced functionality gives the end user a greater degree of control over plant operations, as well as competitive advantages and economic benefits. With one device instead of three, installation is easier and maintenance costs are lower. In addition, because you have reduced the penetrations in your process line, you are better able to meet stringent environmental regulations. These enhanced DP flow products have revolutionized the industry and started a new era in DP based measurement.
