Patent ID: 7798170
Filing Date: 2010-09-21
Classification: F16K,F24F,Y10T

Abstract:
1. A control valve assembly, comprising: (a) a control valve having a valve stem operably engaged with a valve element to move the valve element between open and closed positions by rotary movement of the valve stem; (b) a control valve actuator operably engaged with said valve stem to rotate said valve stem; (c) a field adjustment mechanism comprising a housing with an attached cover plate and a bottom enclosing a pivotally adjustable open stop carriage including a flow pointer extending outwardly from the housing, a stem adapter centrally located within the housing, an adjustment screw passing in front of and not contacting said stem adapter to pivot said adjustable open stop carriage and the included flow pointer, said field adjustment mechanism being operably engaged with both said valve stem and said actuator to enable adjustment of the movement of said valve stem by said actuator, whereby maximum open flow through the valve can be set to a predetermined maximum rate by rotation of said adjustment screw.