Patent ID: 7779861

Claim:
A device for adjusting the flow-rate of a fluid, comprising a valve body which defines an input duct for a low-pressure fluid which is connected to a rotary flow control element, which defines an output port which can be arranged at the calibrated holes of a flow-rate adjustment disk, said calibrated holes being connected to at least one output duct, an actuation handwheel being further provided which is functionally associated with said rotary flow control element, comprising, in said actuation handwheel, means for stably positioning said flow control element so that said output port is arranged at least one of said calibrated holes, said actuation handwheel comprising a fixed lower portion and a rotary upper movable portion which can move axially with respect to said fixed lower portion, and said stable positioning means comprise a fixed front set of teeth which is defined by said fixed lower portion which can be coupled detachably to a movable front set of teeth formed in said upper portion.