Abstract: The valve (31) comprises at least two lateral openings (34, 36) which can be shut off by a plug (40) provided with an axial orifice (48) for the passage of gas and sliding axially in the casing (32) between a position in which the openings, (34, 36) are shut off under the influence of a spring (44) and an open position counter to the action of the spring (44) under the influence of the pressure of the filling gas, and a level valve (52) activated by a float (62) at the bottom of the casing (32).The plug (40) comprises an inner cavity (70), the bottom of which has a cross-section in the shape of an open "V". In this cavity (70) is a ball (72) which prevents the cylinder from being filled when the latter is inclined sufficiently for the ball not to be situated at the bottom of the cavity (70).

Abstract: The device is designed for a valve with or without a residual-pressure valve element and is intended to fill the bottle and to create a vacuum therein, optionally through the residual-pressure valve element.It includes a rotary axial shaft (56) with an eccentric tip (58) intended to lift the residual-pressure valve element by rotation of the shaft (56). The rotation of the shaft (56) is brought about by a pneumatic piston (72) which is automatically actuated by connecting the device to a vacuum pump.

Abstract: The tap comprises inside the cylinder, a two-way valve (30) permitting both filling and draining of the gas cylinder.The valve (30) comprises at least two lateral openings (34, 36) which can be sealed off by a sealing device (40) provided with an axial orifice (48) for the passage of gas and which slides axially in the shell (32) between a position of obstruction of the openings (34, 36), through the effect of a spring (44), and a position of opening against the action of the spring (44), through the effect of the pressure of the filling gas and a level-controlling valve (52) actuated by a float (62) at the bottom of the shell (32).

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 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 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.