Patent ID: 7370673

Claim:
A service valve comprising: a valve body having at least one fluid passage integrated therein, a first valve stem for controlling a flow of fluid through the at least one fluid passage, an isolation port associated with the valve body, the isolation port in fluid communication with the at least one fluid passage through a longitudinal bore that extends through the valve body, an orifice located at one end of the bore, and an annular body axially extending from the valve body and about the orifice; and a second valve stem having a first end, a second end, and a bore integrated within, the second valve stem being movable within the annular body between at least a first position in which the second valve stem first end prevents the flow of fluid between the at least one fluid passage and the isolation port through the longitudinal bore and a second position in which the valve stem first end allows the flow of fluid between the at least one fluid passage and the isolation port through the longitudinal bore, the second valve stem and the annular body having features for restricting the second valve stem from being completely removed from the annular body during movement away from the valve body, wherein the features include one of the second valve stem and the annular body including a groove for receiving a retaining ring and the other of the second valve stem and the annular body including a shoulder for engaging the retaining ring.