SAFETY VALVE Russian patent published in 2018 - IPC F16K17/06 F16K1/50 

FIELD: machine engineering.

SUBSTANCE: invention comprises a body 1 with branch pipes 2 and 3, a cover 4 and a fixed guide holder 5 for rod 6 of a shut-off element 7. A saddle 8 is installed in the branch pipe 2 and resiliently movably pressed by a spring 9 or a silphon 10 to end stop 11 and shut-off element 7. Spring 9 or silphon 10 are mounted in the branch pipe 2 resting on ring 12. An adjusting spring 13 is enclosed in supports 14 and 15, is provided with an adjusting screw 16 and a counter nut 17. Ring 18 is mounted on the thread in upper part of the saddle 8 to adjust pressure of seat of shut-off element 7. The saddle 8 is fixed against rotation in the body 1, for example, by a fixed pin 19, for which a longitudinal groove 20 is made on side wall of the saddle 8. A limiter of adjustment spring straightening 13 is made on guide holder 5, when leaning on which the force of the adjustment spring is transmitted to the body 1, a gap is maintained between threaded adjustment ring 18 and body of the valve 1 in its flow part δ. The safety valve actuates a gland 21, plugs 22, a cap 23.

EFFECT: increased safety valve capacity.

2 cl, 4 dwg