BYPASS VALVE OF DISCRETE ACTION WITH MAGNETIC FIXATION, RELIEF AND CONTROL OF POSITION Russian patent published in 2011 - IPC F16K31/08 F16K1/34 F16K37/00 

FIELD: machine building.

SUBSTANCE: valve consists of case, seat, of shut-off element, rod, spring, packing element, additional spring, washer, two permanent magnets, two magnet conductors, spacer and throttle. Upper and lower magnetic conductors are located on both sides of the washer. The upper one is made in form of a plug and is screwed into the case. The throttle corresponds to a disk in a through channel of the seat and is rigidly connected to the shut-off element. The latter corresponds to a disk. The disk consists out of two plates with a circular chamber between them and is conjugated with a radial gap with the through channel of the seat. The packing element is made in form of a ring of round cross section and is positioned in the chamber with gaps along axis of the valve; it performs free radial travels. The chamber is communicated with space under the shut-off element. The spacer rests against a movable upper magnetic conductor by means of a hollow cover and the spring ring. The bush is screwed into the cover. A pin is set into the latter. The pin is connected with an end of the rod and has a disk permanent magnet on its end. The permanent magnet is conjugated with two position sensors. The sensors turn on magnetically operated sealed switches. The latter are spaced by height within the length of rod run. The disk magnet is compressed in a sleeve between sets of adjusting washers and magnetic conductors.

EFFECT: reliable valve of considerable resource, efficient in operation and serviceable.

2 cl, 4 dwg