SHUT-OFF ADJUSTING VALVE Russian patent published in 1994 - IPC

FIELD: manufacture of fittings. SUBSTANCE: two seats divide interior of housing into two inlet and one outlet inter-seat chambers. Two shut-off members engageable with seats are arranged in housing and are rigidly interconnected. In walls of housing there are holes which are brought in communication with chambers. Cylindrical casing with radial holes is mounted on the housing outside and embraces part of housing with inlet and outlet chambers on side opposite to drive. Circular chamber formed by casing and housing is hermetically closed on side of drive and is connected on opposite side with outlet branch pipe and is brought in communication with outlet chamber through holes in housing. Holes in casing and in walls of inlet chamber are interconnected by means of branch pipes. Housing is cylindrical in shape. EFFECT: enhanced efficiency. 1 dwg