REGULATION DISC VALVE WITH DISCHARGING DEVICE

摘要

Disclosed is a regulation disc valve with a discharging device comprising the following members: a body (1) with a detachable fixed seat (2) comprising peripheral passage apertures (3) and a central channel (13); a rotary disc valve (4) comprising grooves and a central longitudinal aperture and being in constant communication with the seat (2); a rod (5) and a lid comprising a cylinder (8). The cylinder (8) includes a plunger (7) unremovably connected with the valve (4) and defining with said cylinder (8) a discharge chamber (9) in communication with a drainage cavity (11). On the compression surface of the valve (4), an intermediate chamber (12) is formed by sectorial notches which communicate with the central channel (13) of the seat (2). The present invention solves problems of optimal pressure forces of the valve (4) onto the seat (2) according to the different surface areas of the passage apertures (3), without modifying the structural dimensions of the discharging device and within the limits set by a given typical size of the valve. It is also possible to prevent the valve (4) from breaking away from the seat (2), whatever the opening of the valve and without particular modification of the pressure in the discharge chamber (9), and to maintain simultaneously a continuous specific contact pressure on the compression surfaces. This invention also eliminates to flow capacity limits in a disc valve in the event of large pressure drops.