| 摘要 |
PROBLEM TO BE SOLVED: To eliminate the necessity of external pipes for a primary pressure introducing passage for introducing primary pressure into a main back pressure room and a secondary pressure introducing passage for introducing secondary pressure into a pilot room in a servo type pressure controller which includes: a main pressure control part 1 constituted by assembling a main diaphragm 9, to which a main valve 12 for opening/closing a main valve hole 8 is connected, to a main casing 4 forming a main valve hole 8 connecting a primary pressure room 6 to a secondary pressure room 7; and a pilot pressure control part 2 constituted by assembling a pilot diaphragm 18, to which a pilot valve 21 for opening/closing a pilot valve hole 17 is connected, to a sub-casing 15 forming the pilot valve hole 17 connecting the main back pressure room 10 to the pilot room 16. SOLUTION: The primary pressure introducing passage 11 is formed on the main valve 12. The sub-casing 15 is formed eccentrically from the main back pressure room 10, and the secondary pressure introducing passage 20 is formed on one side part of the sub-casing 15 projected to the side of a projection space of the main back pressure room 10. COPYRIGHT: (C)2011,JPO&INPIT
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