Combined stop and control valve

Details Combined stop and control valve Combined stop and control valve

1976-04-13

1978-10-24

Cohan, Alan

Fluid handling

Systems

Sequentially progressive opening or closing of plural valves

137613, 13763015, F16K 100

Patent

active

041216172

ABSTRACT:
A combined stop and control valve for incorporation into a pipe carrying the working medium of a turbo-machine and in particular a steam turbine has the respective bodies of the stop and control valves arranged independently of each other in a common housing which is provided with co-axially arranged valve seats located adjacent one another at the flow opening of the valve cage. The body of the control valve has a bell-shaped configuration into the hollow cavity of which the body of the stop valve travels co-axially, and both of the valve bodies are rigidly supported in their end positions against the valve housing. The valve seat is provided with a throttle collar around which circumferentially spaced slots are distributed, the inner diameter of the collar being approximately equal to that of the control edge of the control valve body. The body of the stop valve has a conical seating surface which together with the inner circumference of the control valve body forms an annular gap tapering in the flow direction of the working medium.

REFERENCES:
patent: 3602261 (1971-08-01), Brown et al.
patent: 3809126 (1974-05-01), Oberle

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