Patent ID: 6691980
Filing Date: 2004-02-17
Classification: F16K

Abstract:
Valve apparatus comprising a valve body having an axial bore including an enlarged diametric bore portion, a second bore portion of a smaller diameter than the enlarged bore portion to form an annular shoulder and a third bore portion opening to the second bore portion axially opposite of the enlarged diametric portion, a fitting removable extending in the enlarged diametric bore portion and having a radially centered fitting bore extending axially extending therethrough, a bonnet removably mounted to the valve body and having a bore opening to the fitting bore, a valve seat mounted in the valve body and extending within at least one of the fitting bore and the valve body third bore portion, the valve body having a first passage opening to the third bore portion and a second passage opening to at least one of the body third bore portion and to the fitting bore axially opposite the valve seat from the opening of the first passage to the body third bore portion, one of the passages being a pressurized fluid inlet passage and the other an outlet passage, the fitting bore having an axially elongated first bore portion extending axially remote from the valve seat, an axially elongated valve stem extending axially through the valve seat and being axially movable between a valve opening and a valve closed position, the valve stem including a first stem end portion axially movable within the third bore portion in fluid sealing relationship therewith, an axially opposite second end portion axially movable in the fitting first end portion in fluid sealing relationship therewith, an axially elongated intermediate third stem portion extending within the valve seat, a fourth stem portion connecting the first stem portion to the third stem portion and a fifth stem portion connecting the second stem portion to the third stem portion axially opposite the fourth stem portion, the valve stem in its valve closed position having one of the fourth and the fifth stem portions in abutting relationship to the valve seat to block fluid flow from one of the passages to the other passage, the stem first and second portions being of the same diameter and of a larger diameter than the third stem portion, a sensor axially movable in the bonnet bore from a first position to a second position for moving the valve stem from one of its position to its other position, resilient means for constantly urging the sensor to its first position and powered actuator means for forcing the sensor to move from its first position to its second position.