VALVE HEAD Russian patent published in 2011 - IPC F16K3/08 

FIELD: construction.

SUBSTANCE: valve head comprises a body with an external thread, a check nut, a sealing ring and an overflow window made below the thread in a tubular wall with width of 180° along the circumference. In the body there is a stem with an overflow hole in the tubular wall and sealing rings. It is rigidly connected with the help of a carrier having a movable ceramic orifice, with a throughput hole installed in its end part. In the end part of the body there is a fixed ceramic orifice with a throughput hole and a sealing bush. The throughput hole in the fixed orifice of the locking pair is arranged in the form of a semi-circle, the centre of which is displaced from the centre of the orifice. The throughput hole in the movable orifice is made as a curvilinear figure aligned with a narrower part towards the hole.

EFFECT: improved adjustment capacity is achieved by smooth variation of throughput section in orifices of the locking pair, obtaining the linear change of the medium flow depending on opening of the locking pair throughput hole and the overflow hole in the stem.

2 cl, 5 dwg