ADJUSTABLE STRAIGHT-FLOW MULTI-PASS THROTTLE Russian patent published in 2013 - IPC F16K3/08 F16K3/32 

FIELD: machine building.

SUBSTANCE: adjustable straight-flow multi-pass throttle includes a housing, inlet and outlet end cover plates, which are connected respectively to delivery and outlet main lines, swivel wheel with actuator, shutoff-control discs with mutually fitted ends and feedthrough openings made for example in the form of sectors separated with jumpers in CLOSED position. One of the discs is rigidly installed relative to the outlet end cover plate and the housing, and the other one is installed in a movable manner with possibility of being turned together with a turning wheel, and discs themselves are pressed to each other with a spring-loaded pressure ring, working edges of holes at least of one of the discs are equipped with grooves performing the functions of flow passage of discs at minimum flow characteristics; at that, depth of the groove is equal to (0.2-0.4)b, where b is width of jumper between holes of discs in CLOSED position.

EFFECT: increasing the stability of maintaining the outlet parameter of a throttle at minimum flow characteristics under conditions of dirty working medium.

4 dwg