Waste water valve

摘要

A valve connects a waste water producing unit to a vacuum sewer. The valve comprises a collecting chamber receiving waste water, a closing member a connection between the collecting chamber and the vacuum sewer, a pressure controlled operating device for moving the closing member, a float moved by liquid level variations in the collecting chamber, and a pilot valve. The operating device of the closing member is controlled by the latter and the latter is controlled by the float. The operating device is constantly in connection with the vacuum system of the vacuum sewer and is influenced by the pilot valve so that the vacuum in the operating device is either increased or decreased to obtain a pressure difference in the operating device which pressure difference causes the valve opening movement.