Valve i.e. check valve, for fluid transport pipes for transport of e.g. brackish water under pressure, has shutter mounted such that shutter is translationally moved in cavity between closing position and opening position of valve

摘要

The valve i.e. check valve (19), has a body, and a shutter (18) moved inside the body, where the body has a shell (20) and a liner (21) made of plastic material covering an internal face of the shell and delimiting a cavity (38). The body comprises another shell (64) and another liner (51) made of plastic material covering an internal face of the latter shell and delimiting another cavity (66) which communicates with the former cavity. The shutter is mounted such that the shutter is translationally moved in the cavity between a closing position and an opening position of the valve. The shutter has a coated metal structure with plastic material. The shell is made of metal or plastic.