Illinois Tool Works Inc.
VALVE DEVICE FOR SHUTTING OFF OR CONTROLLING A FLOW OF A FLUID

Abstract:

A thermostat valve for shutting off and/or controlling a flow of a fluid includes a housing device with a valve passage opening which, in a throughflow direction, has at least one approximately cylindrical passage section and one passage sealing section. The passage sealing section has a larger diameter than the passage section. A closure element for closing off the valve passage opening has at least one approximately cylindrical closure section, which can be arranged in the region of the cylindrical passage section, and one closure sealing section, wherein the closure sealing section has a larger diameter than the cylindrical passage section. An annular gap with an approximately constant opening cross-section is provided between the passage section and the closure section. The annular gap is formed such that, when the valve apparatus is opened, the opening cross-section is constant over a predetermined valve stroke of the closure element.