GB1354452A - Apparatus for filling containers with liquid under gas pressure - Google Patents

Abstract

1354452 Counterpressure filling machine ENZINGER-UNION-WERKE AG 18 April 1972 [14 May 1971] 17781/72 Heading B8T In a counterpressure filling machine the top gas and exhaust gas conduits 5, 8 are separate from the liquid supply conduit 7 and the pressures in the conduits are all controllable independently. Top gas, at a pressure regulated by valve 2 is fed to the gas supply conduit 5 and from there to the container via pipe 9b. Liquid is fed through lines 6a and 6 at a pressure regulated by valve 17, which has a diaphragm 17a acted on by gas at a controlled pressure from the line 18 on one side, and the liquid via a feedback line 17b on the other side, to the liquid supply conduit 7 and into the container 10 through the pipe 9a. Exhaust gas is returned through the pipe 9c to the conduit 8 from which it passes to an observation gauge 12 where any liquid and foam separate out and are drawn off through valve 43. An adjustable valve 14 releases exhaust gas above a preset pressure to atmosphere out of the gauge 12 via line 13, which is also connected to an overflow line 15 in which a return valve 16 is placed, allowing some equalization of pressure between the supply gas conduit 5 and the exhaust gas conduit 8 at a rate controlled by a throttle valve 19. The liquid supply conduit 7 has a vertical extension 20 up which any bubbles from the liquid rise to be vented via an observation gauge 21 out of valve 23. A plurality of devices 9 may be connected, each by three pipes 9a, 9b, 9c, to the conduits 7, 5, 8.