Valve drive assembly and valve using the same

摘要

The invention concerns an valve drive assembly for a valve unit for regulating a flow of fluid with a lead-through of an operating rod (3) through a flange (4), particularly the arrangement of operating rod (3) to the flange (4) for adjusting a defined flow of fluid. The assembly comprises a flange (4), and operating rod (3) and an annular element. The operating rod (3) is disposed through said flange, and annular element is disposed between flange (4) and operating rod (3) defining an annular gap (12) between the annular element and the operating rod. An effective length of the annular gap (12) exceeds a thickness of the flange (4). This invention leads to considerable cost savings, as the component parts can now be produced more simply using manufacturing processes known from mass production, such as deep-drawing or even stamping.

主权项

1. A valve drive assembly with an integrated fluid flow adjusting lead-through in a flange, comprising:
the flange having a thickness; an operating rod disposed through said flange, a space between the operating rod and flange defining a leak rate; and at least one of an additional annular element, additional structural detail and additional material installed between said flange and said operating rod; said at least one of additional annular element, additional structural detail and additional material and said operating rod define an annular gap there between, being continuous along an effective length parallel to an axis of the operating rod and larger than the thickness of said flange so as to define a volume through which a fluid flow rate is set less than the leak rate.