The double gland sealed valve relates to a double disc seal valve provided with a pair of disc valves, a double pressure bellows sealing system for each disc valve, and an intermediate or inter disc chamber that is pressurized to provide sealing of high pressure, high temperature, erosive solid or fluid flow systems. It is therefore an object of the present double gland sealed valve to provide a seal valve which may be used successfully in erosive solid of fluid flow systems. A further object of the present double gland sealed valve is a provision of a seal valve which may be used successfully in the sealing of high pressure, high temperature flow systems. Yet a further object of the present double gland sealed valve is the provision of a double disc seal valve provided with two independently operable disc valves, a pressurized double bellows sealing system for each disc valve and a pressurized inter disc or intermediate chamber formed between the disc valves to provide sealing of high pressure, high temperature, erosive solids or fluid flow systems. a further object of the present invention is the provision of a seal valve having a chamber formed in the flow passage by two disc valves spaced apart in the direction of flow that is pressurized to form an aerodynamic or hydrodynamic seal. A further object of the present invention is the provision of a seal valve having a "swept back" solids collection and dump system. The double gland sealed valve was invented to overcome the disadvantages of the ball valve and the gate valve.

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