Abstract: An automatic pump-out for an underground vapor line drop-out tank used at gasoline service stations and related locations. Condensed gasoline vapors and gasoline (liquid) which collect in gasoline service station vapor recovery systems flow by gravity through a vapor line to an underground drop-out tank. An underground storage is located adjacent the drop-out tank. A fill pipe extends from the surface into the storage tank and a discharge pipe connects the storage tank to the surface gasoline pumps. The drop-out tank and storage tank are provided with vent lines. The storage tank contains a vertically positioned pipe, having an open lower end and a closed upper end, extending from the top to adjacent the bottom thereof. A tube connects the bottom of the drop-out tank to the top of the vertically positioned pipe.

Abstract: This invention relates to an arrangement for separating for films, droplets and sprays from pipe-borne gas flows wherein a pipe is provided with a cross-sectional constriction adapted to accelerate the gas flow in the pipe and annular stripping slot having an annular baffle surface and communicating with a collecting trap, the annular baffle surface being adapted to receive the liquid-containing gas flow and to cause the flow to pass into the collecting trap.

Abstract: A system for discharging sludge out of a settling tank for sewage disposal. It includes a sludge collecting pipe installed at the tank bottom and provided with branch pipes extending downwardly. A compressed air supply pipe and a sludge discharge pipe are connected to the sludge collecting pipe.

Abstract: A ventilation system for rotating water feeds particularly useful in water-cooled generators is equipped with bypass means arranged to extend between coaxial feed duct means and discharge duct means defining a centrally located axis of rotation. The bypass means includes at least one inlet which is located to open in the space around the axis of rotation with outlet means of the bypass means opening into the discharge duct means to vent air or gas bubbles.

Abstract: A device for separating air bubbles from fluids, e. g. feed water, to provide smoother flow thereof, and to protect the piping against corrosion. The device comprises a large hollow cylinder intercalated in the piping and an air-cushion member at the top of the cylinder. An air exhaust pipe is provided in the member to separate the air bubbles.