Pipe breakage safety valve

Details Pipe breakage safety valve Pipe breakage safety valve

1997-09-23

2000-02-22

Lee, Kevin

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

251 63, 13762534, F15B 1301

Patent

active

060270950

ABSTRACT:
The invention is a pipe rupture valve having an internal servovale that comprises a valve piston that, in a setting at a steering edge, blocks the connection between two internal pressure connections of the servovalve. At a distance axially to said steering edge the valve piston has an additional steering edge that separates, sealed against fluids, a pre-loaded spring of the valve piston (or a spring area accommodating this spring) from the pressure connections.

REFERENCES:
patent: 4187870 (1980-02-01), Akkerman
patent: 5381822 (1995-01-01), Christensen

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