Patent ID: 7357368
Filing Date: 2008-04-15
Classification: F16K

Abstract:
1. A combined valve comprising: a valve mechanism including a diaphragm valve element and a valve seat with which the diaphragm valve element is brought into and out of contact to control a flow of fluid; a pilot mechanism including an urging device that presses the diaphragm valve element against the valve seat, the pilot mechanism being operated to bring the diaphragm valve element out of contact with the valve seat by air pressure; and a manual mechanism arranged to act on operations of the pilot mechanism, wherein when the manual mechanism is operated to interrupt a supply passage of air to the pilot valve, the diaphragm valve element is axially moved from a valve open position to a valve closed position by means of the urging device; and wherein the combined valve further comprises a manual-mechanism holding device for holding the manual mechanism in a predetermined position to hold the diaphragm valve element in the valve closed position; wherein the manual mechanism includes a rod formed with a flow passage in an outer periphery, the manual mechanism being arranged to interrupt the supply passage of air to the pilot valve by rotating the rod by a predetermined angle; and wherein the manual valve holding device holds the rod at the predetermined angle to hold the diaphragm valve element in the valve closed position.