Hydraulic volume controlling valve for controlling water supply systems in underground mining

摘要

In accordance with Fig. 1, the invention relates to a hydraulic volume controlling valve for controlling water supply systems in underground mining, in which a flow of medium flows axially through a valve cylinder in which a piston valve provided with an opening forming a throttle in its top is guided. In the piston skirt, the piston has a plurality of radial holes as a flow connection to an annular space which is bounded by the cylinder and at least partially by an inner sleeve and into which radial holes in the inner sleeve open, the piston valve, which is prestressed by a spring, controlling with a piston skirt radial holes in the sleeve. To facilitate the setting of the respective flow rate and to make the set rates visible from outside, a cover slide (49) driveable from outside is arranged over the opening (9) in the piston top (8) and coupled to a pointer (45) arranged outside the housing. <IMAGE>