Abstract: The tap comprises a closure member (22) in a chamber (20) at the intersection of an axial inlet channel (14) and a radial outlet channel (16), and a valve intended to contain a specific residual pressure in the bottle through the action of a spring (44). This valve consists of an annular cylindrical piston (38) fitted in a leaktight manner in the said chamber (20) downstream of the closure member (22) and defining, around an axial operating rod (28), an annular cylindrical passage space (46) in communication, in the open position, with the outlet channel (16) via at least one radial orifice (48) in the said piston (38). A leaktight seal (50) is provided between the base of the said piston (38) and the head of the closure member (22), whereas the piston is stressed by a spring (44) in the direction of the closure member (22) and comprises means for locking it in a position distant from the said closure member ( 22) against the action of its spring (44).

Abstract: The cartridge has an actuating element (20) designed in the form of a non-return valve, with a widened base (22) forming the closing member and a front part equipped with a peripheral gasket (58) which, in the open position and closed position of the non-return valve, is seated sealingly in a narrowed portion (18a) of a chamber (18).

Abstract: The valve has an outlet safety channel (20) closed by a burstable diaphragm (26) wedged between the body (10) of the valve and a plug (24) fitted detachably in the body (10) of the valve, the said plug (24) comprising an axial passage (28) in communication with the outside and filled with a fusible material (32) up to where it comes into contact with the diaphragm (26). A rubber seal (30) resistant to temperatures above the melting point of the fusible material obstructs the axial passage (28) towards the outside.

Abstract: The valve comprises a rotating operating wheel (32) acting on a closing element (20) inside the body (10) of the valve. In order to enable the wheel (32) to be operated easily and at the same time to prevent accidental opening, the wheel (32) is connected to the closing element via a ratchet system (34) with sawteeth which are oriented so as to prevent the closing element (20) from opening without prior axial displacement of the wheel (32) counter to the action of a spring (44).

Abstract: For the filling and for the vacuum emptying of the gas holder, there is a first connection fitting (12) screwable into the valve body (6) of the valve arrangement (4), with sealing-off points at a first location (34) of the valve body (6) of the valve arrangement (4), while, for the normal gas-extraction mode, there is a second connection fitting (50) screwable into the valve body (6), with sealing-off points at a second location (52) of the valve body (6) of the valve arrangement (4), this second location (52) being situated downstream of the said first location (34). The interior of the valve body (6) between the said first location (34) and the second location (52) is connected by means of a bypass channel (54) to the space between the lower part of the shut-off screw body (10) and the upper part of the residual-pressure valve (8).

Abstract: The valve has a residual pressure valve (14) which is known per se, in which however the gas container can be filled through the residual pressure valve. The residual pressure valve (14) is mounted on a stem (32) which is axially displaceable as a result of a cam configuration in such a manner that it assumes a stable operating position under the influence of its spring (24) and an unstable open position under manual action on a filling apparatus (52) counter to the influence of its spring (24).

Abstract: The station is intended for regulating the flow of a gas to a working circuit and for this purpose is connected to at least one reservoir of compressed or liquefied gas and to a reservoir of scavenging gas and comprises a certain number of accessories for control, regulation and monitoring. The station is designed in the form of a compact unit block comprising, on its surface, standard connections in which all the accessories are screwed or welded sealingly and which are connected to one another in a logical and appropriate way by means of conduits made through the block by machining.

Abstract: The valve comprises a body containing a closing member with a sealing surface at the intersection of an inlet duct and an outlet duct for the passage of gas, a piston subjected to the action of a spring or the like and a control device being connected to the closing member via a pusher and via a sealing diaphragm arranged between the pusher and the piston. To lengthen the service life of the diaphragm, the diaphragm is associated with a washer comprised of a slightly deformable material.