SHUTTER UNIT OF BLOCK VALVE Russian patent published in 2010 - IPC F16K3/12 F16K1/42 

FIELD: machine building.

SUBSTANCE: invention relates to piping accessories, and can be used in gas-and-oil producing, petrochemical, power-producing and other industries. In casing co-axial to pass there are implemented reborings. End surface of reborings either straight, or with back taper. The latter contacts to reciprocal surface of either taper, or straight butts of saddles, placed in reboring of casing. Between mentioned end surfaces it is placed spacer made of elastically strained material, for instance polyurethane. Tailpiece of saddles is fixed to casing. The latter is implemented with bending to the center of saddle. Bending is outfitted by longitudinal saw cuts, equispaced by perimetre.

EFFECT: creation of self-centered unit of block valve, safely encapsulated relative to casing.

3 cl, 2 dwg