Abstract: The invention relates to a controllable valve, particularly for delivering a pulsed flow of fluid. It comprises a valve body (10); a valve seat (12) dividing the inside of the body into an inlet chamber (14) and an outlet chamber (16); a valve shutter element (22) capable of moving; an actuator (24) comprising a stationary control part (26) for receiving control signals and a moving part (28); first rigid means of connection (30) for connecting the said moving part of the actuator (28) to the said shutter element (22); a mechanical stop (40′); a member (38) that can be compressed under the effect of a force applied to it, comprising a first end secured to the said mechanical stop; and second rigid means (36′) for dynamically connecting one of the faces of the said shutter element (22b) to the second end of the said compressible member (38).

Abstract: The invention relates to an automatic plant for cutting or welding by gas jet, especially by plasma jet, comprising a torch (T), a first pilot-gas line (L1), a second cutting- or welding-gas line (L2), control means (MP), first element (MR1) for adjusting the pressure of the pilot gas in the line (L1) and second element (MR2) for adjusting the pressure of the gas in the line (L2). The first adjustment element (MR1) are fitted in the line (L1) and controlled by control element (MP). A pneumatic control line (LP) pneumatically connects the line (L1) to the adjustment element (MR2) in order to enable the pressure of the cutting or welding gas to be adjusted in the second line (L2) on the basis of the pressure of the pilot gas in the line (L1), by acting on said second adjustment element (MR2).

Abstract: Installation for working, in particular for cutting or welding, at least one metal piece. The installation includes a fixed support frame provided with a movable working torch and a sensing device. The sensing device includes a capacitative probe and drive means. The installation also includes a first elongated and electrically conductive connection connected at an upstream end of the first connection to the drive means and at a downstream end of the first connection to the capacitative probe. A second elongated and electrically conductive connection is connected at an upstream end of the second connection to the drive means and a downstream end of the second connection is free.