Pressure regulator for compressed gas with adjustable gas pressure sensing assembly

A pressure regulator for compressed gas, said regulator comprising:

• a body with a gas inlet, a gas outlet and a gas passage interconnecting the gas inlet with the gas outlet;
• a shut-off device comprising:
• a seat located in the gas passage;
• a shutter configured for cooperating the seat;
• a pressure sensing assembly defining an internal volume filled with an auxiliary gas and closed by a plug, the pressure sensing assembly being elastically deformable and located in the gas passage downstream of the seat, the pressure sensing assembly being configured for actuating the shutter relative to the seat depending on a gas pressure downstream of the seat;
• and
• a port fluidly connected, via the plug, to the internal volume of the pressure sensing assembly, and configured for fluidly connecting an external source of the auxiliary gas to the internal volume for adjusting a pressure of the auxiliary gas in the internal volume;
• wherein the plug comprises a threaded portion engaging with a fixed portion of the pressure sensing assembly, a conical needle portion engaging with an auxiliary seat formed in the fixed portion, and an internal passage for the auxiliary gas between the threaded portion and the conical needle portion.

A pressure regulator for compressed gas, said regulator comprising:

• a body with a gas inlet, a gas outlet and a gas passage interconnecting the gas inlet with the gas outlet;
• a shut-off device comprising:
• a seat located in the gas passage;
• a shutter configured for cooperating the seat;
• a pressure sensing assembly defining an internal volume filled with an auxiliary gas and closed by a plug, the pressure sensing assembly being elastically deformable and located in the gas passage downstream of the seat, the pressure sensing assembly being configured for actuating the shutter relative to the seat depending on a gas pressure downstream of the seat;
• and
• a port fluidly connected, via the plug, to the internal volume of the pressure sensing assembly, and configured for fluidly connecting an external source of the auxiliary gas to the internal volume for adjusting a pressure of the auxiliary gas in the internal volume;
• wherein the plug comprises a conical pin axially press fitted into an auxiliary seat formed in a fixed portion of the pressure sensing assembly, the conical pin having an outer smooth surface free of thread.