Shut-off valve, in particular for shutting off gas.

Shut-off valve for shutting off pressurized gas, comprising:

• a main channel extending along a longitudinal axis between an inlet opening and an outlet opening, the main channel comprising:
• a first portion extending between the inlet opening and a connecting opening,
• a second portion extending between the connecting opening and the outlet opening,
• a shutter arranged in the main channel at the second portion, the shutter being movable along the longitudinal axis between:
• an open position, in which the shutter is spaced from the connecting opening and in which the inlet opening and the outlet opening are in fluid communication with each other, and
• a closed position, in which the shutter closes the connecting opening and in which the inlet opening and the outlet opening are isolated from each other, and
• wherein the shutter comprises a head movable along the longitudinal axis, wherein in the closed position of the shutter, the head engages and sealingly seals the connecting opening, and in the open position of the shutter, the head disengages the connecting opening, allowing fluid to pass therethrough;
• wherein the head of the shutter comprises a front portion having an ogive shape and extending along the longitudinal axis, wherein in the closed position of the shutter the front portion engages the connecting opening and projects into the first portion of the main channel;
• wherein the main channel comprises a shoulder at the connecting opening, wherein in the closed position, the shutter abuts against the first shoulder, and, in the open position, the shutter is spaced from the first shoulder;
• and
• wherein the head comprises a base projecting radially from the front portion, thereby defining a peripheral sealing lip, and wherein in the closed position, the peripheral sealing lip abuts against the shoulder, and, in the open position, the peripheral sealing lip is spaced from the first shoulder.

Shut-off valve for shutting off pressurized gas, comprising:

• a main channel extending along a longitudinal axis between an inlet opening and an outlet opening, the main channel comprising:
• a first portion extending between the inlet opening and a connecting opening,
• a second portion extending between the connecting opening and the outlet opening, a shutter arranged in the main channel at the second portion, the shutter being movable along the longitudinal axis between:
• an open position, in which the shutter is spaced from the connecting opening and in which the inlet opening and the outlet opening are in fluid communication with each other, and
• a closed position, in which the shutter closes the connecting opening and in which the inlet opening and the outlet opening are isolated from each other, and
• wherein the shutter comprises a head movable along the longitudinal axis, wherein in the closed position of the shutter, the head engages and sealingly seals the connecting opening, and in the open position of the shutter, the head disengages the connecting opening, allowing fluid to pass therethrough;
• wherein the shutter further comprises a main body is constrained to the head and defining an internal channel extending radially from the longitudinal axis and along the latter between an inlet passage and an outlet passage, wherein when the shutter is in the open position, the inlet passage is in fluid communication with a transfer volume of the second portion of the main channel and with the connecting opening, the outlet passage being constantly in fluid communication with the outlet opening of the main channel.
• wherein the main body of the shutter comprises a plurality of radial openings arranged angularly spaced apart from each other around the longitudinal axis, the inlet passage of the internal channel being at least in part defined by the plurality of radial openings.