DISCRETE SLIDE GATE Russian patent published in 2011 - IPC F16K3/06 F16K31/44 

FIELD: mechanical engineering.

SUBSTANCE: gate comprises a body and a cover with overlapped holes, a through-hole gate, sealing elements, a lever, a roller. There is an elastic ring between the body and the cover. Couplings of the gate and the cover, the gate and the body are sealed by floating sealing elements. They represent bushings made of a rigid antifriction material. The bushings are pressed by circular-section elastic rings. Labyrinth-sealed slots are provided in end faces of the bushings. The borders of the bushings coupled with the gate have a taper angle a<60°. The lever is supplemented with a drive in the form of a welded lever, a spring shock-absorber connecting them. The bushings are mushroom-like, and a bushing foot sealed with respect to the body and the cover by the elastic ring, and unsealing means are provided on a bushing hat under the circular-section elastic rings. The drive is coupled with a gas tank float that allows moving the slide gate between the positions "Open" and "Closed" discretely without intermediate positions and stops when a liquid phase reaches minimum or maximum set levels.

EFFECT: enabled gas phase accumulation with low output gas ratio.