Measuring Elements
MET
Meter run are used in small diameter pipelines, because of the roughness of the internal surface of pipe, that affects very much the coefficient of flow of the primary element.
FLOW ORIFICE TYPE METER RUN
Meter run are used in small diameter pipelines, because of the roughness of the internal surface of pipe, that affects very much the coefficient of flow of the primary element.
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MUL
Multi-stage restriction orifices are used when on a pipeline it is requested to reduce the inlet pressure of more than its half.
MULTISTAGE RESTRICTION ORIFICE
These devices, composed of a series of more than one restriction orifice, reduce progressively the pressure inside the pipeline, avoiding erosion of materials and disliked noises, typical when the same pressure loss is obtained by a unique restriction orifice.
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ORI
Orifice flanges are intended for use instead of standard pipe flanges when an orifice plate or flow nozzle must be installed.
ORIFICE FLANGE ASSEMBLY
Pairs of pressure tappings are machined into the orifice flange, making separate orifice carriers or tappings in the pipe wall unnecessary.
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PIT
The primary device of measurement more advanced for liquid, gas and steam. The Averaging Pitot is a primary instrument of measure, designed to produce a differential pressure, proportional to the flow.
AVERAGING PITOT TUBE
Based on the theorem of Bernoulli, the four upstream holes take the velocity of the flow in four different points of the pipe (taking an ‘average’ value), the downstream hole measures the static pressure. The differential pressure that follows is proportional to the flow.
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VEN
Venturi Tubes are used for flow measurement of low pressure fluids and in very large pipes. Their application is particularly indicated in the measurement of clean or lightly dirty fluids, where it is required a flow measure with minimum energy loss.
CLASSICAL VENTURI TUBE AND NOZZLE VENTURI TUBE
There are two common types of Venturi tube: the Venturi Nozzle, and the Classical (Herschel) Venturi. Both feature have nozzle venture a convergent inlet section and a divergent outlet section. The classical Venturi convergent section is a simple truncated cone, whereas for the Venturi nozzle, the inlet contour matches that of the ISA 1932 flow nozzle.
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