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DELTAFLUID
France
A flow straightener greatly reduces disturbances in a flow while a conditioner reduces disturbances and also allows a good redistribution of the speed profile, at each point of the section of the pipe. Thus, these devices make it possible to reduce the upstream straight lengths and to improve the measurement accuracy in the case of a flow measurement. They are therefore to be positioned between a pipe fitting (elbow, reduction, etc.) and a flow measurement element while respecting the distances specified in the standard.
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France
Different types of pressure transmitters exist: differential pressure transmitter for measuring a pressure difference ΔP but also a relative or absolute pressure transmitter. For more specific applications, it will be necessary to use: a differential pressure transmitter to correct variations of pressure and temperature of a gas two transmitters for the same differential pressure flow element to increase the measuring range For more details on these cases, please see the Frequently Asked Questions tab on this page.
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France
According to ISO 5167, flowmeters with orifice plates and nozzles (long radius) can benefit from D - D/2 mounting. This corresponds to a positioning of the upstream tap at a distance of 1D (D, internal diameter of the pipework) from the upstream of the orifice plate and the downstream tap at a distance of 1/2D from the downstream of the plate. This type of assembly has the advantage of not requiring orifice flanges (more expensive than standard flanges): you simply prepare bosses on the piping upstream and downstream of the measurement to position the pressure taps. It is widely used for large pipe diameters.
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France
The 1''/1'' flowmeter is also called a flowmeter with flange pressure taps. The high pressure upstream measurement is 1 inch from the upstream edge of the plate and, symmetrically, the low pressure measurement is 1 inch from the downstream edge of the plate. This is often a pre-assembled complete set with orifice plate mounted between orifice flanges. Orifice flanges are standardized and manufactured to ASME B16.36. The orifice plate is manufactured in accordance with ISO 5167 or ASME MFC-3M.
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France
The annular chamber (carrier rings) is proposed for orifice plates, for venturis and for nozzles. It has several advantages: it favors the circulation of the fluid over the complete circumference of the pipework and offers a more stable and precise averaged pressure; in the case of the orifice plate, it also allows to change only the plate in case of maintenance or change of process compared to a monoblock where the complete system must be changed. This type of mounting is particularly recommended for pipe diameters smaller than DN50.
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DELTAFLUID
France
For steam applications, condensate pots are essential. They are used to condense the fluid upstream of the differential pressure transmitter. Installed at the same height, they allow accurate measurement by maintaining a constant condensate height in the impulse lines above the differential pressure transmitter. The condensation pot can also be used to protect the transmitter in the case of a flow measurement of a corrosive / aggressive fluid. In this case we speak of separation pots. For more information, see the Frequently Asked Questions tab on this page.
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