Patent classifications
F16K5/168
VALVE SEAT RING AND MULTI-WAY VALVE HAVING VALVE SEAT RING
Disclosed are a valve seat ring and a multi-way valve having the valve seat ring. The multi-way valve comprises an upper valve body, a lower valve body and a rotary valve core, wherein the valve seat ring is located in the rotary valve core, the valve seat ring comprises a body, the body is provided with a penetrated through-hole, a first annular boss is arranged on an outer wall of the body, and a second annular boss is arranged on an inner wall; the upper surfaces of the first annular boss and the second annular boss are respectively flush with the upper surface of the body to form a sealing surface which fits with a sealing surface of the upper valve body in a sealed manner; and an annular gap is formed between the lower surface of the first annular boss and the rotary valve core, so that liquid in the chamber and an oil incoming channel respectively acts on the lower surface of the first annular boss or the second annular boss to form a sealing load. A pressure is applied from either the chamber or a metering orifice, a sealing load hydraulically acted on the valve seat ring is formed by the hydraulic acting force of the chamber or the metering orifice, and the hydraulic adaptability for sealing the valve seat ring is realized, thereby meeting the requirement of sealing in the multi-way valve at the leakage level of sealing level VI under a high-pressure difference.