Abstract: The invention relates to a quick-connect coupler for at least one tube, including a tubular body having at least one receiving portion shaped to receive an end segment of the tube, the receiving portion being at least partially made from a transparent material, so as to make it possible to view the end segment of the tube when the latter is received in the receiving portion, and a retaining member mounted inside the receiving portion, arranged to oppose the withdrawal of the tube when a pulling force is exerted on the tube.

Abstract: Ring for visually determining the crimped status of a coupling for tubes, comprising an annular portion exhibiting at least one recess revealing the body of the coupling and at least one fin situated facing a recess, the at least one fin comprising a first end connected to the annular portion and situated some distance from the coupling, and a second end situated near the body of the coupling so that the at least one fin is displaced by the crimping tool during the coupling crimping operation so as to at least partially close off the corresponding recess.

Abstract: In a device including a first calibrated or adjustable orifice and a second orifice located downstream of the first orifice, the opening of the second orifice is adjusted by a valve whereof the position is controlled by apparatus displacing the valve depending on the pressure difference prevailing between upstream and downstream of the first orifice and by apparatus producing a displacement depending on the temperature of the premises wherein the device is located. The device is mounted in two separate bodies, mutually linked, a first body corresponding to the first orifice and a second body corresponding to the second orifice. The device enables to produce both automatic hydraulic balancing and thermostatic control.