The Z-Frame product series includes both SAE engine- drive and frame-mounted modes. The smaller BZR closed-coupled pumps are suitable for use in hydraulic motor-driven applications, and the larger BZ-SAE and frame-mounted pumps deliver excess of 20,000 hours of bearing life. An interchangeable housing allows seals to be easily changed in the field from packing to mechanical or mechanical to packing for increased versatility and ease of maintenance. The volute can be rotated for increased application flexibility, and a large opening to the packing area allows easy access on either side for improved serviceability. A supported thrust bearing handles extreme loads, even in the most demanding conditions.