Jeumont Schneider Corporation

Other

Francis Timmermans

Jean Vandervorst

The present invention pertains to a double shut-off valve device which is specifically intended to eliminate the consequences of erosion and the resulting lack of perfectly tight sealing. This device consists of two concentric valve components, namely an inner component, (3), and an outer component, (4), which, in a closed position, respectively rest upon seats, (5) and (6), so as to halt the flow of fluid between sections of a pipe, (1) and (2). Functioning of these components is controlled by a rod (10) which is directly connected to the outer valve component (4), and by a flexible bellows (7) attached to the inner valve component (3). Under these circumstances, the inner valve component (3) halts the flow of fluid, and the outer valve component (4), which is not subject to fluid pressure, can provide tight sealing without erosion. Opening of both valve components occurs simultaneously on account of the accompanying shoulders, (8) and (9).

Double shut-off valve which provides perfectly tight sealing

To increase performance levels of pressurized water pumps, a hydrostatic joint arrangement (pressure seal) permits a controlled flow to occur between two chambers containing the same fluid placed under different pressures. This arrangement includes a metal bearing (3) attached to a rotary movable shaft (4) and a float (5) which is capable of unrestricted axial movement, whereby minimum flow of fluid between the bearing and the float can produce sufficient force for gradually raising the float (5), while maintaining a pressure seal. The bottom portion (7) of the float (5) contains openings (8) which are connected to a source of pressurized fluid by means of intake ducts (9), thereby to provide fluid flow between the bearing and the float regardless of the pressure difference between the two chambers.

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Jeumont, France

Francis Timmermans