Patent ID: 6328278
Filing Date: 2001-12-11
Classification: F16K

Abstract:
An outlet valve adapted to be arranged in a portion of a vessel for treatment of animal or vegetable oil, said portion being intended to be filled with oil, comprising a valve disc (1) connected to a piston rod (4) and a piston (5) actuated by steam under pressure, said valve disc (1) being movable between a first closed position and a second open position and being arranged to bear against a valve seat (2) in the first position, wherein the piston (5) is arranged in an operating device (6), said operating device (6) being designed as a unit, the interior of said operating device being sealed against the oil, the operating device (6) being arranged at such a distance from the valve seat (2) that the oil, when the valve is in the second position, passes a zone between the operating device (6) and the valve seat (2) and the operating device (6) is provided with two connections (7, 8) to a source for the steam under pressure, said connections leading to spaces in the operating device (6) located on each side of the piston (5), the operating device (6) being either submerged in the oil or positioned below the valve seat (2) so as to be in the path of the oil when the valve is in the second position, wherein the piston rod (4) is surrounded by a sheet.