CONSTANT AIR FLOW RATE VALVE, AND PROCEDURE FOR CONTROLLING A CONSTANT AIR FLOW RATE VALVE

摘要

A valve (1) with constant air flow comprises a passage (14) of variable cross-section, preferably conical. A throttle (3) of variable form is arranged in this passage (14) and approaches the flow walls (14a) of the passage (14) depending on the differential pressure in the passage (14). According to the invention, the throttle member (2) with its throat portion (3), can move in the direction of the central axis (X1) of the passage (14) to obtain a flow rate having the desired value. The invention also relates to a method of controlling a constant air flow rate valve.