Dosatron International

Sebastien Furet

Philippe Duquennoy

Christophe Charriere

Sandrine Lambinet

David Vacher

Najib Laatiaoui

Manal Badii

Matthieu Darbois

A diaphragm pump having a body including a suction connection and a discharge connection, a suction valve and a discharge valve; a control chamber in which the diaphragm is disposed, and a working chamber located on the side of the diaphragm opposite the control chamber; a control pipe suitable for linking the control chamber to a control connection of the body, the control pipe configured to alternately apply a vacuum and a pressure on the diaphragm; the body includes a housing oriented transversely relative to the control pipe, the housing being open towards the outside at one end, and closed at the other end by a bottom including a suction opening and a discharge opening, the diaphragm being positioned close to the bottom, and held by a cap engaged in the housing, the cap having a recess forming the control chamber, linked to a passage communicating with the control pipe.

Pump having a cap retaining a diaphragm in a receptacle

Metering device for introducing a liquid additive into a main liquid flowing along a pipe, includes a pump for withdrawing additive from a container and metering it, this pump including a first inlet for receiving a flow of main liquid which drives the pump, a second inlet for picking up additive and an outlet for the resulting mixture; a Venturi installed in the pipe, and connected in parallel with the pump, the first pump inlet connected by a first line to the Venturi inlet while the outlet connected by a second line to the Venturi throat; a first element for varying the restriction at the Venturi neck, and a second element sensitive to the pressure drop across the pump for controlling the first element to reduce the bore section when the pressure drop across the pump increases, and increase the bore section when the pressure drop across the pump decreases.

Controllable constriction device for the throat of a venturi channel for introducing a liquid additive into a stream of main liquid

Proportional dosimeter including a metering body with a main liquid inlet () and an outlet (), a hydraulic motor () housed in the body, actuated by the main liquid, and connected to a plunger piston () that moves in a first chamber (), the piston plunger drawing in fluid in an outbound stroke, a check valve provided to allow liquid to pass to the interior volume of the body when the pressure in the first chamber exceeds a certain pressure, during the return stroke; the dosimeter includes a second chamber () of variable volume bounded by a membrane subjected to the pressure in the first chamber, the second chamber including an intake orifice () for the auxiliary liquid and a delivery orifice () for the auxiliary liquid, this delivery orifice being connected by a pipe () to an injection chamber (S) situated downstream of the outlet of the dosimeter body.

Proportional dosimeter for metering an auxiliary liquid into a main liquid

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Bordeaux, France

Sebastien Furet