公开(公告)号：US10557181B2

公开(公告)日：2020-02-11

申请号：US15114310

申请日：2015-01-27

Applicant: Luxembourg Patent Company S.A.

Inventor： Stephan Sellen ,  Philippe Schmitz

IPC: C21D7/12 ,  C21D7/04 ,  F16K27/06 ,  C22F1/05

Abstract: The invention is directed to a method for improving the fatigue behavior of the body (2) of a gas valve, the body comprising at least two bores (4, 10) and at least one bore intersection (20) defining an internal volume; wherein the method comprises the following step: subjecting the internal volume to an autofrettage by applying a pressure of comprised between 100 MPa and 500 MPa by means of a liquid. 10. The invention is also directed to a gas valve body (2) comprising at least two bores (4, 10) and at least one bore intersection (20) defining an internal volume with an internal wall; wherein the internal wall is treated by autofrettage resulting in compressive stresses at the intersection or at least one of the intersections.

公开(公告)号：US20190032803A1

公开(公告)日：2019-01-31

申请号：US16072384

申请日：2017-01-23

Applicant: Luxembourg Patent Company S.A.

Inventor： Thomas Andreas ,  Stephan Sellen ,  Philippe Schmitz

IPC: F16K17/08 ,  F16K15/18

CPC classification number: F16K17/082 ,  F16K15/186

Abstract: A valve for pressurized gas or chemical agent. The valve comprises: a body with: an inlet, an outlet, and a passage which connects the inlet with the outlet and which includes a seat]. The valve further comprises a sliding piston able to engage with the seat in order to close the passage and a telescopic extension sliding against the passage in order to guide the piston in the passage at least between the open position and the closed position. The pressure difference between opposite faces of the piston pulls away the piston and the telescopic extension from the seat in order to open the passage, the passage remaining closed under pressure equilibrium. Additionally, a fire extinguishing system.