AUTOMATIC VACUUM BYPASS DEVICE Russian patent published in 1997 - IPC

FIELD: various industries including production of aggressive, explosive and combustible liquids. SUBSTANCE: device has ejector 1 connected with hermetic reservoir 3 by means of vacuum main 21 and secured on upper flange 2, housing of double-acting valve 9 with stop 17, self-setting valve 10 with seat 23 having through holes for passage of venting air. Valve 10 is provided with control rods 22 at the bottom which are free to pass through holes in seat 23. Lower flange 4 holds suction branch pipe 24 and drain branch pipe 20 which are connected with reservoir 3 through inlet valve 14 and outlet valve 13. Filter element mounted inside hermetic reservoir 3 is made in the form of cylinder with 10-mm holes over its generatrix and float which form together float chamber 18. Inside float chamber, float is located which is made in the form of hollow cylinder consisting of two halves 7 and 8 with slot in upper portion and self-setting valves 11 and 12 provided with centering rings 25. Horizontal aprons 15 and 16 mounted in upper and lower portions of float are used as limiters of horizontal oscillations of float. EFFECT: enhanced reliability. 1 dwg