Abstract: A butterfly valve device includes two members (1A, 2B) forming a casing with at least one passage (10) containing a butterfly valve (2) fixed to a pivoting spindle (3) and having joint surfaces pressed together in a joint plane (11) transverse to the passage and passing through the axis of the spindle. Packings (4A, 4B) in the joint surfaces at the perimeter of the passage are pressed together to form a ring through which the spindle passes in a sealed manner; the packings (4A, 4B) have different inside dimensions to define two faces (43) transverse to the perimeter of the passage forming seats for the butterfly valve (2) oriented in opposite directions. The device can include a plurality of passages provided with a butterfly valve. It can also include a motor-drive device to drive the spindle in rotation. The butterfly valve device can be used in the cooling circuits of vehicle engines.

Abstract: A thermostatic device comprises a chamber with ports, at least one of which can be closed off by a valve carried by a moving part of a metering thermostatic element. In order to obtain two reliable levels of regulation, and to maintain regulation unless the device is completely destroyed, a duct opening into the chamber via a seat for the valve contains at least one region of a thermostatic element for adjusting the regulation threshold containing selectively operated heating means and comprising a stop for the thermostatic element, which stop can itself move in the direction of movement of the said moving part so as to move closer to the seat when the heating means are switched on. The device can be used in combustion engine cooling circuits.

Abstract: The device comprises a chamber (3) having at least three ports (4, 5, 6) two of which can be closed off by valves (9, 10) carried by a main thermostatic element (7) housed partially in the chamber, one valve moving away from its seat when the other moves towards its own seat.