EP 2541074 A1 20130102 - Fail-freeze device for positioner
Title (en)
Fail-freeze device for positioner
Title (de)
Fail-Freeze-Vorrichtung für Stellungsregler
Title (fr)
Dispositif à mémoire de position en cas de panne pour positionneur
Publication
Application
Priority
EP 11425167 A 20110628
Abstract (en)
A fail-freeze valve positioner system is disclosed. The system has a transducer with a first type output port connectible to a valve actuator, and a second type input port receptive to a valve position signal that is proportional to an output of the first type output port. In addition, the system has a monitoring circuit that generates a pilot activation signal while predefined conditions are met. A primary piloted valve in communication with the monitoring circuit is coupled to the first valve. The first type output port is disconnected from the valve actuator while the pilot activation signal and thus the first valve are deactivated, holding the valve actuator in place.
IPC 8 full level
F15B 20/00 (2006.01)
CPC (source: EP)
F15B 20/002 (2013.01); F15B 2211/30515 (2013.01); F15B 2211/329 (2013.01); F15B 2211/6336 (2013.01); F15B 2211/6355 (2013.01); F15B 2211/665 (2013.01); F15B 2211/87 (2013.01); F15B 2211/8752 (2013.01)
Citation (search report)
- [I] EP 0822344 A2 19980204 - SIEMENS AG [DE]
- [XI] US 3943824 A 19760316 - FLETCHER EDWARD HORTON
- [A] US 2010037957 A1 20100218 - TABELANDER STEFAN [DE], et al
- [A] DE 102005004418 A1 20060803 - SAMSON AG [DE]
- [A] "Elektropneumatischer Stellungsregler SIPART PS, Siemens Katalog MP31", SIEMENS KATALOG MP31, XX, XX, 1 January 1996 (1996-01-01), pages 8/02 - 8/08, XP002090433
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DOCDB simple family (application)
EP 11425167 A 20110628