Pietro Fiorentini S.p.a.

Paolo Calciolari

Armando Amadini

Stefano Bernardi

Paolo Nardi

Paolo Aditeo Nardi

Roberto Rossi

A pressure relief valve for a gas pressure regulator includes: a deformable and gas-tight, laminar element; an outflow channel that allows the passage of the gas between one side and the other of the laminar element including a precisely-sized hole; a shutter removably associated with the laminar element through a coupler that defines, for the shutter, a closed position of the outflow channel and an open position of the outflow channel; an elastic element interposed between the shutter and the laminar element in order to push the shutter towards the closed position. The couple includes a through hole belonging to the laminar element and a shaft slidingly inserted in the through hole, and the shutter is operatively connected to the shaft. The outflow channel is distinct from the through hole, as sealing is provided to prevent the passage of the gas between the through hole and the shaft.

Pressure relief valve for a pressure regulator and pressure regulator comprising said pressure relief valve

The invention is a gas vent valve () for a gas pressure regulator (), comprising: a tubular body () developed between two opposite openings (); a shutter body () biased towards a position in which a first opening () of the tubular body () is closed and movable from the closed position towards an open position for opening the first opening () due to the effect of a pressure acting from the outside of the tubular body () through the first opening (); constraining means () configured so as to prevent the movement of the shutter body () from the closed position towards the open position when the ambient temperature exceeds a predefined value.

Vent valve for gas pressure regulators and pressure regulator equipped with said vent valve

Method for determining the density (D) of a multiphase fluid (F) flowing through a pipe () and containing a gas (G) which determines a fluctuation of the actual instantaneous density of the fluid (F), said method comprising the following steps: defining a series of consecutive time periods (S, S) which are shorter than the time length corresponding to the highest frequency-component of the fluctuation of the actual instantaneous density; conveying through a section () of the pipe () a photon beam () suited to undergo an attenuation while crossing the fluid (F); counting the actual number (A) of photons of the beam () which cross the pipe () during a first time period (S) of the series; calculating a corrected count (C) as the weighted average value of the actual count (A) and of the corrected count (C) calculated for the preceding time period (S); converting the value of the corrected count (C) into a corresponding value of the density (D) of the multiphase fluid (F) for the first time period (S) through a predefined function.

Method for determining the density of a multiphase fluid, densitometer using said method and multiphase meter using said densitometer

Device () for measuring electric parameters of a fluid (F), comprising: two measurement circuits () for measuring, respectively, the dielectric permittivity and the electrical conductivity of the fluid (F); two electrodes (') facing each other from opposite sides of the fluid (F); a selector system () for alternatively connecting the two measurement circuits () to the electrodes (&#x2032;). Each electrode (&#x2032;) comprises two sectors () suited to establish mutually separate electrical contact with the fluid (F) and the electrical conductivity measurement circuit () comprises two measurement sections (V, A) of different impedance, each one of which being connectable to a corresponding sector () of each electrode (&#x2032;).

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Lonigo, Italy

Paolo Calciolari