Patent ID: 6082393
Filing Date: 2000-07-04
Classification: F01D,F16K,Y10T

Abstract:
An emergency shutoff valve exerciser for a valve steam of an emergency shutoff valve of a steam turbine, comprising:a frame connected to the body of the steam turbine shutoff valve for supporting the components of the emergency shutoff valve exerciser;a plunger matingly attached to the upper end of the valve stem of the emergency shutoff valve and fitting through said frame for enabling vertical reciprocal movement of the valve stem by vertical reciprocal movement of said plunger; anda retainer engaged with said plunger and engaged with said frame for restricting the vertical reciprocal movement of said plunger relative to said frame so that exercising of the valve stem is limited to a selected range of motion;wherein said frame includes an upper member with a threaded opening for receiving said retainer and said plunger, said retainer and plunger being concentrically engaged with one another.