SPRING LOADED POPPET VALVE

摘要

A unidirectional tubular energy-conserving axial flow control vave is provided, capable when open of accommodating the full flow of fluid through a fluid line at uniform velocity and a high flow rate with a negligible pressure drop comprising, in combination, a valve housing; a valve fluid flow passage therethrough substantially free from sharp bends and abrupt changes in direction and having an enlarged intermediate portion; a valve seat disposed in the enlarged portion of the fluid flow passage, defining the passage as an annulus about the outer periphery of the valve seat; a tubular valve element reciprocably disposed in a portion of the flow passage and movable between open and closed positions, into and away from engagement with the valve seat; having an open center through which must pass fluid flowing through the valve flow passage in the valve housing; the tubular valve element when in sealing engagement with the valve seat extending across the line of flow between its central portion and the annular portion of the passage, and closing the valve passage at the annular portion thereof, and when away from sealing engagement with the valve seat opening the valve passage for fluid flow therethrough; a fluid pressure-receiving surface on the tubular valve element, exposed to fluid pressure in the annular portion of the valve fluid passage, and tending under a sufficient fluid pressure to move the tubular valve element towards an open position; and bias means acting on the tubular valve element and tending to move the tubular valve element towards the closed position, so that only at a fluid pressure differential across the valve element exceeding a predetermined minimum will the valve element move against the biasing force of the bias means from the closed into an open position.