METHODE FOR CONTROLLING THE STATE OF CLOSED VALVES FOR MAINTENANCE ASSESSMENT

The invention relates to a method for the operation control of motor-driven valves (6) for controlling liquid flows, especially for monitoring dilution water valves, such as they are used in fiber material web production machines, the drive (7) of the valve comprising a stepper drive (17) and the er...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	BIENER, PETER
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACTUATING-FLOATS BLASTING COCKS CONTROL OR REGULATING SYSTEMS IN GENERAL CONTROLLING DEVICES FOR VENTING OR AERATING ENGINEERING ELEMENTS AND UNITS FUNCTIONAL ELEMENTS OF SUCH SYSTEMS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING METHODS OF PRODUCING PAPER THEREON MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS PAPER-MAKING PAPER-MAKING MACHINES PHYSICS PRODUCTION OF CELLULOSE REGULATING TAPS TEXTILES THERMAL INSULATION IN GENERAL VALVES WEAPONS
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Beschreibung
Zusammenfassung:	The invention relates to a method for the operation control of motor-driven valves (6) for controlling liquid flows, especially for monitoring dilution water valves, such as they are used in fiber material web production machines, the drive (7) of the valve comprising a stepper drive (17) and the erroneous counting of the steps caused by a malfunction of the valve being used to determine a friction coefficient for the valve.