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4.2.2.5 Pump type OH5 Close-coupled, vertical, in-line, single-stage overhung pumps shall be designated pump type OH5. Close-coupled pumps have their impellers mounted directly on the driver shaft. (This type does not meet all the requirements of this International Standard; see Table 3.) Figure 5 - Pump type OH5 14 4.2.2.6 CENTRIFUGAL PUMPS FOR PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES Pump type OH6 High-speed, integral, gear-driven, single-stage overhung pumps shall be designated pump type OH6. These pumps have a speed-increasing gearbox integral with the pump. The impeller is mounted directly to ansi download the gearbox output shaft. There is no coupling between the gearbox and pump; however, the gearbox is flexibly coupled to its driver. The pumps may be oriented vertically or horizontally.

Figure 6 - Pump type OH6 4.2.2.7 Pump type BB1 Axially split, one- and two-stage, between-bearings pumps shall be designated pump type BB1. Figure 7 - Pump type BB1 API STANDARD 610/ISO 13709 15 4.2.2.8 Pump type BB2 Radially split, one- and two-stage, between-bearings pumps shall be designated pump type BB2. Figure 8 - Pump type BB2 4.2.2.9 Pump type BB3 Axially split, multistage, ieee download between-bearings pumps shall be designated pump type BB3. Figure 9 - Pump type BB3 4.2.2.10 Pump type BB4 Single-casing, radially split, multistage, between-bearings pumps shall be designated pump type BB4.

These pumps are bing.com also called ring-section pumps, segmental-ring pumps or tie-rod pumps. These pumps have a potential leakage path between each segment. (This type does not meet all the requirements of this International Standard; see Table 3.) Figure 10 - Pump type BB4 16 4.2.2.11 CENTRIFUGAL PUMPS FOR PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES Pump type BB5