Combination high and low pressure cutoff control valve

Abstract

Abstract A VALVE FOR SHUTTING OFF A FLUID MEDIUM IN RESPONSE TO PRESSURE VARIATIONS IN A SOURCE EXCEEDING A PREDETERMINED MAXIMUM AND FALLING BELOW A PREDETERMINED MINIMUM WHEREIN A LONGITUDINAL BORE IN THE BODY COMMUNICATES WITH AN OPENING, INLET, AND OUTLETS IN THE VALVE BODY. A PAIR OF VALVE MEANS IS SLIDABLY MOUNTED IN THE LONGITUDINAL BODY BORE WITH ONE OF THE PAIR OF VALVE MEANS BEING SLIDABLY AND TELESCOPICALLY RECEIVED WITHIN A BORE IN THE OTHER PAIR OF VALVE MEANS, AND THERE ARE SEAL MEANS FOR SEALING BETWEEN THE VALVE MEANS AND FOR SEALING BETWEEN THE VALVE MEANS AND THE BORE IN THE BODY ON EACH SIDE OF THE OPENING TO FORM A CHAMBER WITHIN WHICH THE PRESSURE FROM THE SOURCE IS RECEIVED TO ACT ON THE PAIR OF VALVE MEANS TO MAINTAIN THEM IN A PREDETERMINED TELESCOPED RELATION WHEN THE PRESSURE IN THE SOURCE IS BETWEEN THE PREDETERMINED MAXIMUM AND MINIMUM. THE VALVE MEANS ARE PROVIDED WITH SUITABLE PASSAGES AND COOPERATING SEAL MEANS SO THAT WHEN THEY ARE IN THE PREDETERMINED TELESCOPED RELATION, THE FLUID MEDIUM PASSES THROUGH THE VALVE FROM THE INLET TO ONE OF THE OUTLETS. THE VALVE MEANS ARE PROVIDED WITH ADDITIONAL SEAL MEANS AND PORTS, OR PASSAGES, SO THAT WHEN THE PRESSURE IN THE FLOW CONDUIT EITHER EXCEEDS THE PREDETERMINED MAXIMUM OR FALLS BELOW THE PREDETERMINED MINIMUM, THE VALVE MEANS MOVE TO A DIFFERENT TELESCOPED RELATION SO THAT THE FLUID PRESSURE MEDIUM, INSTEAD OF BEING DISCHARGED FROM THE INLET TO THE OUTLET, IS SHUT OFF IN THE VALVE BODY, AND THE OUTLET WHICH WAS RECEIVING THE FLUID PRESSURE MEDIUM IS CONNECTED TO DISCHRGE TO ATMOSPHERE THROUGH ANOTHER OUTLET IN THE VALVE BODY. ADJUSTABLE MEANS ARE PROVIDED FOR URGING THE PAIR OF VALVE MEANS TO PREDETERMINED TELESCOPED RELATION AND FOR VARYING THE PREDETERMINED RELATION.

Inventors

• 👤 C Peters

Bibliographic Details