Integrated valve assembly with means for blocking the actuator

An integrated valve assembly with a main body comprising:

• a) an internal gas passage for conveying gas between a gas inlet and a gas outlet;
• b) a gas expansion means placed in said internal gas passage between said gas inlet and said gas outlet;
• and
• c) a locking valve used for controlling the release of the gas and comprising a rotary actuator that can be operated by the user, wherein said locking valve further comprises a blocking means that acts on the rotary actuator of the locking valve to prevent the rotation of said rotary actuator, said rotary actuator being centered on a boss of said valve assembly, wherein said boss supports said gas outlet and a connection means for connecting a gas use device provided with an inlet interface and with additional connection means capable of cooperating with the connection means and with said blocking means so as to permit said rotary actuator to rotate after said inlet interface has been connected to an outlet interface of the valve assembly.