The KQAM type axial horizontal split multi-stage pump has a double inlet type, with two single-suction impellers in the first stage and a double-suction impeller in the last stage. The pump outlet is arranged in the center of one side of the pump body, and the two suction inlets are arranged on both sides of the outlet center on the other side of the pump body. The main flow-passing components include double suction chambers, first-stage impeller, first-stage pressurized water chamber, first-stage transition flow channel, secondary impeller, secondary pressurized water chamber, etc. All impellers are back-to-back, and all transition flow channels are symmetrically arranged, which can perfectly balance the axial force caused by the pressure difference on the impeller cover plate and the small shoulder of the rotor. The pressurized water chamber adopts a double volute structure, which can effectively balance the radial force acting on the rotor and ensure safe, stable and reliable operation.

The KQA(S) series medium-opening multi-stage pump is a new product designed and manufactured according to the latest version of the standard AP1610 “Centrifugal Pumps for Petroleum, Heavy Chemical and Natural Gas Industries”. Especially the horizontal, axial horizontal split, multi-stage centrifugal pump designed for extreme working conditions such as high temperature, low temperature and high pressure. The casing is a volute structure with centerline support. The impeller is symmetrically arranged and the axial force is automatically balanced. There are no complex balance plates, balance drums and other balancing mechanisms, making it safer and more reliable when transporting media containing particles. The inlet and outlet are arranged under the pump body and can be disassembled and installed without moving the inlet and outlet pipelines. The first-stage impeller can be designed as a single-suction or double-suction structure. The sealing system is designed completely in accordance with API682 “Shaft Seal System for Centrifugal Pumps and Rotary Pumps” and can be configured with various forms of sealing and flushing, cooling or insulation solutions. Special designs can also be made according to user requirements. Depending on the shaft power and speed, the bearing can adopt a self-lubricating rolling bearing structure or a sliding bearing structure and a forced lubricating bearing structure. Viewed from the drive end, the pump rotates clockwise. If the user has special requirements, the design can also be rotated counterclockwise.
This product has extensively absorbed the advantages of similar products at home and abroad in terms of design and manufacturing technology. Its technical level is at the international leading level. It has high overall efficiency, good cavitation performance, compact and reasonable structure, stable and reliable operation, and simple and convenient maintenance.

1) Unique innovative design, dual inlets and multi-stage impellers, equivalent to two pumps connected in parallel and in series, with large flow and high head.
2) Using an excellent hydraulic model and combined with CFD flow field analysis to optimize the design, the pump efficiency is high. The main stress-bearing components such as the pump body, pump cover, and bearing body are all checked using ANSYS finite element strength calculation to ensure the strength of the pump and improve the reliability and service life of the pump.
3) Depending on the load of the pump unit, the bearings can use different combinations such as rolling bearings, sliding bearings + rolling thrust bearings, sliding bearings + sliding thrust bearings, etc. The bearing lubrication methods can use self-lubricating and forced circulation lubrication.
4) Shaft seals can use bulk mechanical seals, packaged mechanical seals and packing seals. When the medium contains a small amount of impurities, it is recommended to use packing seals. When selecting a mechanical seal, a special structure mechanical seal should be used, and external clean water flushing is required.
5) The impellers are arranged back-to-back symmetrically, and the axial force is well balanced. The small residual axial force is borne by the thrust bearing at the non-driving end.
6) The suction chamber adopts a semi-spiral suction chamber, and the impeller inlet flow rate is uniform; the pressure water chamber adopts a double vortex chamber to effectively balance the hydraulic radial force; by optimizing the design of the flow passage, local hydraulic losses are reduced and the efficiency of the pump is improved.
7) The pump shaft is protected by a shaft sleeve, which is sealed by an O-ring, so that the conveyed medium does not come into contact with the shaft.
8) The two suction inlets of the pump are located on one side of the pump body, and the discharge outlet is located on the other side of the pump body. They are both arranged below the center line of the pump shaft. During maintenance, the rotor components can be lifted by simply removing the pump cover. There is no need to move the inlet and outlet pipelines, making maintenance easy.