VALVE DEVICE WITH LOW LEVEL OF EMISSIONS Russian patent published in 2017 - IPC F16K41/04 

FIELD: valves production.

SUBSTANCE: invention relates to valve production, particularly to valve device, suitable for connection to process line or to vessels under pressure and made with possibility of limitation uncontrolled emissions into atmosphere from valve channel. Valve device (1) controls flow passing through flow path, and includes housing (2) with channel and stem (20). Stem (20) is located in channel with possibility of activation for valve opening and closing. In axial direction stem (20) has directed to flow path upstream end, and opposite downstream end. First seal (50) is made around stem between stem and channel. There is spring (64) arranged with provision of axial compressive force transmission to first seal (50). Spring (64) is located inside housing (2) between stem (20) and channel on first seal (50) downstream side.

EFFECT: invention is aimed at improvement of sealing efficiency due to more directed compression force applied to seal.

17 cl, 2 dwg