Abstract: A nozzle for delivering vaporized liquid material has a cylindrical housing with a central, cylindrical cavity having a fluid inlet and a fluid outlet. The nozzle also has a plunger inserted into the fluid outlet of the housing so that the plunger and the housing form a fluid path. The plunger is moveable between a first position and a second position. A plunger stop is attached to the housing at the fluid inlet. A spring retainer is attached to the plunger. At least one spring is disposed between the housing and spring retainer to urge the plunger towards the first position. A method includes the steps of biasing a plunger moveable relative to a housing, with a fluid passage defined by the housing and the plunger, towards a first position; and providing fluid pressure to the fluid passage to urge the plunger away from the first position.

Abstract: A nozzle for delivering vaporized liquid material has a cylindrical housing with a central, cylindrical cavity having a fluid inlet and a fluid outlet. The nozzle also has a plunger inserted into the fluid outlet of the housing so that the plunger and the housing form a fluid path. The plunger is moveable between a first position and a second position. A plunger stop is attached to the housing at the fluid inlet. A spring retainer is attached to the plunger. At least one spring is disposed between the housing and spring retainer to urge the plunger towards the first position. A method includes the steps of biasing a plunger moveable relative to a housing, with a fluid passage defined by the housing and the plunger, towards a first position; and providing fluid pressure to the fluid passage to urge the plunger away from the first position.

Abstract: A coupling is mounted between a valve stem of a valve and a rod of a valve actuator. A first fitting of the coupling is mounted on an end of the rod and a second fitting is mounted on an adjacent end of the stem. The first fitting includes an opening therein which loosely entraps an expanded portion of the second fitting. The first and second fittings respectively have aligned surfaces which are generally perpendicular to the rod and stem. The surfaces make contact during movement of the rod toward the valve for closure of the valve. A resiliently deflectable spring is disposed between the first and second fittings to limit the amount of force transmitted to the valve through the stem when the rod is in a position for backseating the valve.