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Publication of ES330668A1publicationCriticalpatent/ES330668A1/en
Structures Of Non-Positive Displacement Pumps
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Abstract
Process for the protection of centrifugal pumps, particularly boiler feed pumps, during low-load and no-load operation, characterized in that a hydraulically actuated minimum volume valve, incorporated in a drain pipe, and a control valve are provided. flow incorporated in the discharge pipe of a centrifugal pump and that has a positively controlled bypass, which communicates with one side of a control cylinder of the minimum volume valve, acting on the other side of the control cylinder by the derived pressure waters below the regulating valve of the boiler feed. (Machine-translation by Google Translate, not legally binding)
ES0330668A1965-08-301966-08-29Procedure for the protection of centrifugal pumps. (Machine-translation by Google Translate, not legally binding)
ExpiredES330668A1
(en)
Improvements in the construction of controls regulators of the hydraulic pressure in the work cylinder of machines. (Machine-translation by Google Translate, not legally binding)