Description: smallest head at which the pump may be operated permanently; Name: smallest head allowed while operation
Description: Minimum permissible head at which the pump can be operated without suffering damage; Name: Minimum allowable head
Description: permanent operation, short-term operation or periodic operation characterized by one of more loads and which remains unchanged during a certain period, or, in the case of non-periodic operation, where the load and speed generally change within the permissible operating range; Name: Operation type time sequence of the drive