Vacuum isolation globe valve is suitable for cutting off or connecting the medium in the return water condensation system pipeline of thermal power plants with nominal pressure PN4.0-10.0Mpa and working temperature ≤ 200 ℃. Applicable media include water, steam, etc. The sealing surface has low friction during movement, easy opening and closing, and automatic compensation for sealing surface wear. The structure is simple, compact, easy to maintain, and has a long service life. The valve cover packing chamber is equipped with a vacuum sealing structure, which has a self expanding and compressing effect, and the sealing adopts an expanding material to isolate the system from the atmosphere, with good system airtightness. This series of valves has two connection forms: flange and welding, and there are two driving modes: manual and electric. This valve is suitable for pipelines with working temperatures ≤ 425 ℃ and ≤ 550 ℃ and working media of water, steam or air, as an opening and closing device; Suitable for steam turbine condensation and vacuum negative pressure systems in thermal power plants, serving as a vacuum isolation and sealing function.

Structural features: