| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotary valve that can maximally reduce frictional resistance (sliding resistance) between a valve body and a valve element without causing an increase in size and cost or the like, and can smoothly rotate the valve element without causing a response delay.SOLUTION: A rotary valve includes: a valve body 20 that has an upper valve seat 15, a valve element accommodating chamber 14, side ports 11, 12, and a bottom port 13; and a valve element 20 that has a rotary shaft 25 and a cylindrical part 22 having a flat top 23 and an open lower surface, and in which an opening 30 having a predetermined shape and continuously changing opening areas of the side ports 11, 12 by rotation is provided in the cylindrical part 22. Pressure equalizing holes 35, 35, etc. are formed in the top 23 of the valve element 20. A washer (an annular member) 45 formed of a resin material excellent in slippage is interposed between a lower surface 15b of the upper valve seat 15 and the top 23. |
