| 摘要 |
PROBLEM TO BE SOLVED: To provide a pressure reduction valve capable of preventing generation of so-called spring noise by keeping an equilibrium state of a seat packing to a valve seat.SOLUTION: A valve element driving member 10 disposed in a pressure chamber 2b at a secondary side of a fluid passage and bringing a seat packing 20 into contact with a valve seat 5 or separating the same from the valve seat, has a valve rod 12 projecting from a piston portion 11 receiving energization force of a main spring 6 energizing to the seat packing 20, toward a primary-side valve chest 2a provided with the seat packing 20, and pressing the seat packing 20. The valve rod 12 is inserted to a communication passage 4c formed at a secondary side of the fluid passage and extending along the energizing direction of a valve spring 7. A supporting portion 14 radially projecting and kept into contact with an inner side face 4e of the communication passage 4c, is formed on a peripheral face 12b of the valve rod 12.SELECTED DRAWING: Figure 1 |
