Partial stroke valve test apparatus

Details Partial stroke valve test apparatus Partial stroke valve test apparatus

2006-11-07

2006-11-07

Raevis, Robert (Department: 2856)

Measuring and testing

Blower, pump, and hydraulic equipment

Reexamination Certificate

active

07131324

ABSTRACT:
This invention relates to an emergency valve shutdown system having an integrated test facility. The invention provides an apparatus for testing emergency shutdown valves in a process industry comprising: a valve having a plurality of limit switches each limit switch arranged to indicate that the valve has reached a corresponding one of a plurality of predetermined valve positions; a valve monitor module arranged to send a signal to said valve to initiate movement of said valve and to receive feedback relating to said limit switches; wherein said feedback is provided via a single feedback signal between the valve and the valve monitor module.

REFERENCES:
patent: 5057699 (1991-10-01), Spence
patent: 6112765 (2000-09-01), Boyer
patent: 2002/0108436 (2002-08-01), Albuaijan
patent: 2003/0136929 (2003-07-01), Clemens et al.
patent: 2338051 (1999-12-01), None
patent: 2346672 (2000-08-01), None
patent: 2372087 (2002-08-01), None
UK Patent Search Report for Application No. GB 0317382.0.

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