VALVE SEAT RING AND MULTI-WAY VALVE HAVING VALVE SEAT RING Russian patent published in 2017 - IPC F16K1/46 F16K11/74 

FIELD: machine engineering.

SUBSTANCE: valve comprises an upper part (1) of a valve body, a lower part (2) of the valve body and a rotary middle part (3) of the valve, in which a valve seat ring (8) is in the rotary middle part (3) of the valve, the valve seat ring (8) comprises a body (10). The body (10) is provided with a through opening (18) inwardly extending, a first annular projection (13) is located on the outer wall (11) of the body (10) and a second annular projection (14) located on the inner wall (12); the upper surfaces of the first annular projection (13) and the second annular projection (14) are respectively located at the same level with the upper surface of the body (10) forming a sealing surface (15) adjoining the sealing surface (9) of the upper part (1) of the valve body in a sealed manner; and an annular gap is formed between the lower surface of the first annular projection (13) and a rotary middle part (3) of the valve, so that the liquid in the chamber (4) and the channel (5) of supplied oil respectively acts on the bottom surface of the first annular projection (13) or the second annular projection (14) creating a sealing load. The pressure is applied either from the chamber (4) or from a metering orifice (6), the sealing load is hydraulically acting on the ring (8) of the valve seat generated by the hydraulic force of the chamber (4) or the metering orifice (6), and a hydraulic self-adjustment is realised to seal the seat ring (8) of the valve seat.

EFFECT: sealing in multi-way valve at the level of air-tightness of sealing level at high pressure difference.

8 cl, 6 dwg