Meiden Sie Antriebe mit der Angabe Class A ab 1000 Nm.
„Inching“ ist definiert als: „required tooccasionally drive the valve to a position between fully open and fully closed.“
Class C (modulating ) steigert die Anforderungen auf: „required tofrequently drive the valve….”
|Die Erläuterungen zur Tabelle lauten im Normentwurf:
Zu a) : One cycle consists of nominal 90oangular travel in both directions ( i.e 90o to open and 90o to close), based on an averaged load of at least 30 % of the rated torque with the ability to transmit 100 % of the rated torque for at least 5 % at each end of travel, with a cumulative operating time not exceeding 15 minutes in one hour.
Zu b) : One start consists of a movement of at least 1o in either direction, with a load of at least 30 % of the rated torque. The cyclic duration factor ( i.e. the ratio between the running period and total period ) shall not be less than 25 % (e.g. 1 sec. running and 3 sec. resting ).
Zu c) : One start consists of a movement of at least 1o in either direction, with a load of at least 30 % of the rated torque.