Ring section multi-stage pump (API610/BB4)

1. Shell: The center line of the shell is supported to withstand higher forces and moments. There is no need for a heating pump system, and the middle section can be tapped in the middle.

2. Impeller and guide vane: The impeller and guide vane are precision cast, with hydraulic models of various specific speeds; to ensure higher efficiency and lower operating costs within a wide operating range, D80 (export) and The above specifications can be equipped with an optional first-stage double-suction impeller. Improve vapor resistance NPSH

3. Shaft: The critical speed is higher than the operating speed; the staggered keyway transmits sufficient torque and minimizes shaft deflection. The outer surface of the shaft is hard Cr-plated to protect the wear area.

4. Axial force balance: There are two types of impeller arrangement structures in this series: one is the impeller arrangement in series. The balance mechanism of the pump in this structure uses a balance drum (single balance drum or drum-disc-drum) plus a thrust bearing. Balance the axial force. This structure can completely balance the axial force and extend the service life of the bearing: The other is a back-to-back symmetrical arrangement of the impellers, and the axial force is automatically balanced. Since this structure eliminates the balancing mechanism, it is more suitable for transporting particles containing particles. medium.

5. Bearings and lubrication: The bearing type can be selected from self-lubricating structure bearings or forced lubrication structure bearings according to the shaft power and speed. The bearing box can be fan-cooled or water-cooled to choose from.

6. Shaft seal: The sealing system implements A1682 4th edition (centrifugal pump and rotary pump sealing system), and can be configured with various forms of sealing, flushing, and cooling solutions.