Shut-off valve

Details Shut-off valve Shut-off valve

1981-12-08

1984-12-25

Cangialosi, Sal

Induced nuclear reactions: processes, systems, and elements

Reactor protection or damage prevention

Fluid flow reversal protection

1375992, 1376372, G21C 900

Patent

active

044908369

ABSTRACT:
The valve stem of the controlled shut-off valve has a lid and a piston movable in a cylinder. A first cylindrical chamber and a second annular chamber facing the lid are separated by a piston and connected to a low-pressure chamber by ducts extending in the housing of the shut-off valve and connecting lines connected to the ducts outside the housing. The first chamber is also connected to the inlet side of the shut-off valve via a duct extending in the housing and containing at least one control valve actuated by a control line. Closing valves are provided in the connecting lines. A throttle means having a fixed flow cross-section is disposed in the duct of the first chamber inside the housing. The duct of the second chamber has a fixed minimum cross-section.

REFERENCES:
patent: 4060453 (1977-11-01), Schabert et al.
patent: 4066498 (1978-01-01), Hoffmann et al.
patent: 4092214 (1978-05-01), Schabert et al.
patent: 4238290 (1980-12-01), Schabert et al.
patent: 4245412 (1981-01-01), Schabert et al.

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