Applications of cartridge pumps

Sleeve pump is mainly used in situations where NPSHA is low, to prevent cavitation. Relevant operation information can be found in this post: http://bbs.hcbbs.com/viewthread.php?tid=71786&highlight=%CD%B2%B4%FC%B1%C3

Tubing pump, also known as double-cylinder pump; vertical tubing pumps comply with API 610 (8th edition), ASME (American Society of Mechanical Engineers), VIII (Pressure Vessels) + IX (Welding and Brazing Code). Operating parameters: Specification – DN: 40~200mm; Flow rate (Q): 40~800 m3/h; Head (H): 800 m; Operating pressure (P): 10.0 Mpa. Operating temperature (t): –180℃~+180℃. Application range: Transporting clean or slightly contaminated liquids, liquids at low or high temperatures, chemically neutral or corrosive liquids. 　 Special structure: The vertical cartridge pump is multi-stage and radially split. The impeller is of the single-suction radial type and is equipped with a single-stage casing. The first-stage impeller is usually an inlet impeller. The axial force is supported by centrifugal thrust ball bearings. In cases of a large pressure difference, the balance drum mechanism is used to balance the axial force. The casing only bears the inlet pressure, and the length of the casing as well as the installation depth of the pump depend on the requirements for NPSH cavitation performance. If the pump is installed on a container or connected to pipeline flanges, it may not require a housing. The radial thrust ball bearings in the bearing housing are lubricated by lubricating oil, and there is an independent internal circulation automatic lubrication system. The hydrodynamic radial sliding bearing is located at the inlet end of the pump. At a certain installation depth, the pump shaft is equipped with an intermediate support, which is lubricated by liquid. The shaft seal options include: single-face mechanical seal, double-face mechanical seal, and tandem mechanical seal, all equipped with cooling, flushing, or seal fluid systems. The inlet pipe and outlet pipe are located above the mounting flange, at 180° to each other, but other arrangements are also possible. Flange standards are in accordance with DIN or GB. The connection threads for the auxiliary pipelines are G or Rc/R. The motor is driven through a flexible coupling (extended or non-extended coupling). The installation type of the motor that drives the pump is V1. From the drive side, the pump rotates counterclockwise. The maintenance technical data for some such pumps is provided for reference only. Unit: mm. Name of the component: Data. Interference between the impeller and the shaft: 0.05~0.08. Interference between the balance disk and the shaft: 0.02~0.04. Total length of the rotor assembly: 8.00±0.15. Half-length of the rotor assembly: 4.0±0.5. Axial clearance of the balance disk: 0.06~0.08. Thrust clearance: 0.30. Clearance at the inlet ring of the impeller: 0.35~0.5. Clearance at the intermediate body’s ring: 0.35~0.45. Radial clearance between the balance disk sleeve and the shaft: 0.40~0.50. Sealing compression amount: 5~6. Tightening force on the bearing shells: 0.0~0.02. Radial clearance of the bearing shells: 0.10~0.12