Title:
METHOD OF OPERATING STOP VALVE AND REGULATING VALVE IN PRESSURE REDUCING SYSTEM
Document Type and Number:
Japanese Patent JPS6199777
Kind Code:
A
Abstract:
PURPOSE:To remarkably reduce differential pressure applied to an actuator and to lessen the amount of power required for operating a stop valve by operating a stop valve earlier than opening of a regulating valve at the time of opening a pressure reducing system and operating the stop valve behind the opening of the regulating valve at the time of closing the system. CONSTITUTION:The opening and closing timing for a stop valve 3 and a regulating valve 4 is staggered, so that at the time of opening the valves, the stop valve is opened earlier than the regulating valve 4, and at the time of closing the valves, the adjust valve 4 is first fully closed, and then the stop valve 3 is closed. Thus, differential pressure at the time of opening and closing the stop valve is reduced to lessen the amount of power required for opening and closing the stop valve, so that an actuator is reduced in size to produce an effect of reducing the cost.
Inventors:
YATABE NOBURO
Application Number:
JP21965084A
Publication Date:
May 17, 1986
Filing Date:
October 19, 1984
Export Citation:
Assignee:
FUJI ELECTRIC CO LTD
International Classes:
F16K11/10; G05D16/06; (IPC1-7): F16K11/10
Attorney, Agent or Firm:
Iwao Yamaguchi
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