REDUCTION VALVE Russian patent published in 2007 - IPC F16K17/04 F16K31/12 G05D16/10 

FIELD: hydraulics.

SUBSTANCE: reduction valve comprises housing that is provided with supplying, discharging, and draining passages. The cylindrical slide valve is mounted with a spaced relation to the spring-loaded pusher inside the bore made in the housing to form a face control chamber from the side opposite to the pusher. The chamber is in communication with the draining passage through the longitudinal passage made in the slide valve. The draining passage is connected with the space that is defined by two slide valve collars. The first collar separates the space from the discharging chamber, and the second one separates it from the control chamber and forms the throttling slot between the supplying and discharging passages. The first collar of the slide valve is mounted with a diametrical space of 1.3-1.8 of the diametrical space of the second collar. The first collar is provided with the ring groove that divides it into two cylindrical parts. One of the parts is located from the side of the pusher and is provided with flats uniformly arranged over the periphery.

EFFECT: expanded functional capabilities.

3 cl, 4 dwg