1. Split volute structure, the pump is a multi-stage, single-suction (or first-stage double-suction), support structure at both ends. The inlet and outlet are located on both sides of the pump body. The shell is split horizontally and axially, making it easy to repair and maintain. There is no need to disassemble the pipeline, just open the pump cover and you can directly take out the rotor components for inspection.
2. The pump has a wide flow range, wide efficient area, stable operation and easy maintenance. The pump inlet and outlet are on the lower half of the pump body, and the legs of the pump body are on the lower half of the pump body, and adopt a centerline support method.
3. The pump and motor are connected by an extended diaphragm coupling, so there is no need to disassemble the pipeline and motor when replacing bearings and mechanical seals.
4. The impellers are designed with back-to-back arrangement to automatically balance the axial force. The double-volute diversion shell structure is used to balance the radial force. The shaft is thickened and has good rigidity.
5. The pump has the qualities of smooth operation, low vibration, and long service life of bearings and mechanical seals. The mechanical seal has been forced flushed and has a long service life. The high-pressure area is in the center of the pump, and the mechanical seal works in the low-pressure area. It is not easy to leak and the sealing is reliable.
6. Pump body pressure bearing: the main oil pumps can be used in series with a maximum pressure of more than 15MPa;
7. The mechanical seal adopts products from professional petrochemical manufacturers and promises to guarantee a continuous trouble-free operation life of more than 25,000 hours;
8. The mechanical seal cavity is designed in accordance with API682 specifications and meets the requirements of PetroChina and Sinopec Material Procurement Technical Standards System to facilitate mechanical seal installation and interchange;
9. Equipped with complete left and right bearing temperature and vibration monitoring sensor transmitters, mechanical seal leakage monitoring device, and related data collection. Remote monitoring and control can be achieved through SCADA. The high-temperature or low-temperature medium transportation is equipped with thermal insulation materials or electric heating to adapt to the transportation requirements of special media.
10. Bearings can be sliding bearings and rolling bearings, and can be self-cooled, air-cooled or water-cooled to meet the needs of high-speed operation.

(1) First-stage single-suction structure:

(2) First-stage double-suction structure:

Self-lubricating sliding bearing structure: The rotor is supported on the pump body by radial sliding bearings at both ends. A pair of thrust bearings is arranged behind the radial bearing at the non-driving end to limit the axial movement of the rotor.

Forced lubrication sliding bearing structure: It consists of a radial sliding bearing and a thrust bearing that are forced to be lubricated by an external oil station. The radial bearing is a sliding bearing with a four-oil wedge structure, and the thrust bearing is a tilting pad bearing with bidirectional oil injection and forced circulation lubrication. Equipped with temperature protection and monitoring instruments respectively.

(3) Detailed structural drawing of complete pumping system:

Note: Corresponding materials and inspection records can also be provided according to contract requirements.