| 摘要 |
PROBLEM TO BE SOLVED: To obtain reliability, pressure tightness, and durability of a seal, solve a problem of noise, and reduce the cost by reducing the number of parts and facilitate the manufacture. SOLUTION: A valve has a valve seat 6 to open a valve port 5 at an inflow passage 2 side of a valve chamber 1 installed in a valve housing 4. In the valve chamber 1, there is provided with a valve element 7 to open the valve port 5 by leaving the valve seat 6 when fluid pressure from a flowout passage 3 into an inflow passage 2 is applied, and to close the valve seat 5 by moving to the valve seat direction 6 direction when fluid pressure from the outflow passage 3 into the inflow passage 2 is applied. The valve seat 6 is comprised of a first valve seat part 10 formed of elastic material and a second valve seat part 11 formed of non-elastic material. When the valve element 7 moves to the valve seat 6, at first the valve element 7 is brought in contact with the first valve seat part 10, and subsequently is brought in contact with the second valve seat part 11 by maintaining the contact state with the first valve seat part 10 and subjecting to the elastic deformation of the first valve seat part 10. COPYRIGHT: (C)2004,JPO&NCIPI
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