Measuring and regulating valve
AssigneeKeystone International Holdings Corp.
InventorRudolphus P. M. Lemmens
Life of this patent
Estimating the term…
Abstract
Measuring and regulating valve assembly which includes a butterfly valve and a measuring flange, the measuring flange being situated upstream of the butterfly valve, the distance between the valve and the measuring flange being at least 0.6.times. the nominal passageway diameter, the assembly including a control box that has an adjustable stop that may contact a cam of a sleeve connected to an operating means whereby the maximum opening angle of the butterfly valve can be restricted in a reproducible manner, the sleeve being connected to the valve shaft.
Claims21
A measuring and regulating valve assembly, comprising:
- a stop valve (5) having a nominal passageway and moveable into open (90.degree.), closed (0.degree.) and intermediate positions with the aid of an operating means (14) for rotating a valve shaft (15);
- a measuring flange with connections for receiving a means for measuring a pressure differential across said flange, said measuring flange disposed upstream of said stop valve;
- and
- a control box (3) with an adjustable stop (26) for limiting the opening rotation of said operating means to restrict the maximum opening angle of said stop valve in an accurately reproducible manner, to any desired angle less than 90.degree. said adjustable stop moveable recti-linearly through a plane substantially perpendicular to the axis of said valve shaft while the maximum opening angle is being set.
A method of adjusting the maximum opening angle of a measuring and regulating valve assembly comprising a stop valve (5) having a nominal passageway and moveable into open (90.degree.), closed (0.degree.) and intermediate positions with the aid of an operating means (14) for rotating a valve shaft (15), and a measuring flange with connections for receiving a means for measuring a pressure differential across said flange, said measuring flange disposed upstream of said stop valve, the method comprising:
- providing a rotating valve (15) as the stop valve;
- providing a control box (3) with an adjustable stop (26) for limiting the opening rotation of said operating means to restrict the maximum opening angle of said stop valve in an accurately reproducible manner to any desired angle less than 90.degree.;
- and
- moving said adjustable stop recti-linearly through a plane substantially perpendicular to the axis of said valve shaft from an initial position adjust to the desired maximum opening angle.
Dependencies are inferred from the claim text.