| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pressure control valve capable of reducing hysteresis without requiring guide by an outer circumference of a spring even if a sealing ball is used. <P>SOLUTION: In a pressure control valve provided with a valve holder, the sealing ball, a piston, and the spring, the piston can reciprocate in an axial direction by energizing force of the spring and a pressure in a high pressure part side to close an exhaust pressure port when pressure at the high pressure part gets to predetermined value or less, and to open the exhaust port and release pressure in the high pressure part by moving with resisting the energizing force of the spring when pressure in the high pressure part exceeds the predetermined value, an a spring seat including an outer circumference part corresponding to an inner circumference surface of a first cylindrical space part, a spring guide part defining a radial direction position of a spring, and a ball seat part on which the sealing ball is seated between the spring and the sealing ball. <P>COPYRIGHT: (C)2008,JPO&INPIT |
