Attachable to the valve
One such means of limiting the rate of flow of fluid issuing from a fire hose is illustrated and described in U.S. Pat. No. 3,361,148. In this patent the Globe Valves which connects the hose to a water source has a breakable member which is mounted on the valve hand wheel and which, when the valve stem is turned to open the valve, is adapted to engage a ring adjustably mounted upon the valve bonnet. This valve, although serving its intended purpose, has the disadvantage of requiring the use of a specially constructed hand wheel and bonnet which substantially adds to the cost of the valve. The valve of my invention eliminates this disadvantage.
This invention concerns a fluid valve having a body and connected bonnet. The body includes a valve seat and has an inlet and an outlet. An axially shiftable stem is received by the bonnet and includes an inner end having a valve member attached thereto which cooperates with the valve seat to define the rate of fluid flow through the valve and an outer end having a hand or other grip mounted thereon. A stop means is attached to the stem between the hand grip and the bonnet and includes a part positioned adjacent the bonnet and shiftable with the stem and a part which is engageable with a stationary stop carried by the valve to limit movement of the valve member relative to the valve seat.
A standard valve, such as a GLOBE VALVE, can be converted into a restricting valve with only slight modification. The stop means is clamped or otherwise secured to the valve stem. The packing or stuffing nut threaded on the upper portion of the valve bonnet through which the stem projects is preferably removed and replaced by a nut having an outwardly projecting peripheral lip. The stop means is adapted to engage the lip when the stem is longitudinally shifted a selected distance to open the valve a predetermined extent. The attachment of the stop means to the valve stem and the exchange of packing nuts can be accomplished through the use of simple hand tools and requires only a minimum of effort. A minimum number of specially designed parts is required, and valves in current use can be quickly and inexpensively converted into restricting valves. Cast Gate, Globe, Check Valves
MORE NEWS