Gea Mechanical Equipment Italia S.p.a.

Niro-soavi S.p.a.

Gea Niro Soavi S.p.a.

Silvia Grasselli

Simone Grandi

Marco Gandini

Alfredo Ricci

Luca Salvarani

Vincenzo Diraimondo

Leonardo Maggi

Adelmo Volpi

Giovanni Gasparelli

Mattia Sandei

Marco Marcucci

A method for validating a homogenizing valve (), comprising the steps of:—preparing an emulsion having a hydrophilic phase comprising, in weight percentage on the total weight: from 55% to 74% demineralized water, from 10% to 20% glycerin and from 3% to 4,2% butylene glycol, and a lipophilic phase comprising, in weight percentage on the total weight: from 5.1% to 5.9% squalane, from 7.2% to 8.8% caprylic acid alkyl ester and from 0.665% to 0.735% cetyl alcohol;—subjecting the emulsion to forced passage within the homogenizing valve () from a high pressure zone (HP) to a low pressure zone (LP) a plurality of times.

Method for validating a homogenizing valve

Homogenizing valve () at high pressure, particularly for application to fibrous fluids, comprising: a valve body (); a passage head () integrally joined to the valve body (); an assembled organ () formed of two pistons () and a striking head (), which is axially mobile inside a through hole of the valve body (), so that the striking head () defines with the passage head () an interspace () of passage of the fluid, the assembled organ () being rotatable thanks to the lower cogged profile which engages in a cogged tool ().

Homogenizing valve for removing fibers from fibrous fluids

A homogenizer valve () comprising a ring-shaped first chamber () with an inlet () for receiving fluid under high pressure, a second ring-shaped chamber () with an outlet () for fluid under low pressure, a passage head () and, between the first and the second chamber, an impact head () which is axially mobile with respect to the passage head () and acts together with it to define a gap between the impact head () and the passage head () forming a passage () for the fluid passing from the first chamber to the second chamber, and a pusher () acting on the impact head () to push it in an axial direction towards the passage head () thus partially counteracting the pressure exerted by the fluid contained in the first chamber () on the annular surface () of the impact head (), this passage () comprising at least a first portion () and a second portion () positioned in sequence between the first chamber and the second chamber, and where the first portion faces in a radial direction and the second portion faces in a direction with an axial component.

Homogenizing valve

Method for disruptingyeast cells in an aqueous solution, by means of a continuous process under high pressure (up to 4000 bar), using a homogenizer. The suspension to be processed passes through a homogenizing valve with a 'sharp edge' or 'knife edge' passage head in order to achieve a 100% cell disruption rate with a single passage, at a dynamic pressure equal to or above 2000 bar. The &#x201c;sharp edge&#x201d; or &#x201c;knife edge&#x201d; profile of the passage head () is characterized by an inside diameter () of 10.9-14 mm and an outside diameter () of 11.9 mm-15 mm, and operates at a flow rate of 100-500 liters/hour and a dynamic pressure of more than 2000 bar.

Method and apparatus for disrupting cells in a fluid suspension by means of a continuous process

In a homogenization unit, a homogenizing valve comprises an impact head which, with a lower valve body, forms an annular high-pressure chamber (64) supplied by a high pressure channel (24). An annular surface of the impact head cooperates with an opposite face of a passage head (22) accommodated in the lower valve body to define a radial passage gap, with an impact ring facing it; the gap leads into a low-pressure annular chamber (54) from which a low pressure channel (34) leads off. The impact head comprises two spaced out guide areas to guide the head in the valve body.

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Parma, Italy

Silvia Grasselli