Description: mean flow velocity through the valve opening area; Name: valve opening speed
Description: mean velocity of the flow through the valve spill area; Name: valve spill velocity
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