Horizontal Multistage Pumps

single-product

Multistage or ring section horizondal foot mounted pumps have multiple impellers that are mounted in single shaft and are connected in series. These pumps are fitted with diffusers to connect the stages efficiently. Fluid enters the first chamber at suction line pressure and leaves at some elevated pressure. Upon leaving the first stage, the fluid enters the second stage where the pressure is increased further.

The more stages the pump has, the higher the final discharge pressure. These pumps have the unique ability to produce higher pressures with the addition of every stage, but flow range always remains constant for a given rpm. Axial thrust of impellers are balance by balancing disc and seat or balancing drum arrangement. All the impellers are fitted with renewable wear rings to maintain efficiency.

single-product

Casing has cast water passages of free annular design and the first and final casings are incorporated with feet to support the horizontally mounted pump. The running clearance between the chamber and the impeller boss is maintained by replaceable diffuser and neck rings.

The Impellers are produced with high quality castings to give dimensional and hydraulic repeatability to ensure performance parameters. Each impeller is dynamically balanced to ensure that the complete rotating element is correctly balanced initially and also subsequently, if fitted with replacement impeller.

The Neck Ring/Wear Rings fitted to the suction cover and stage casing are made of a material compatible with the impellers. There are close running clearance between these components and neck rings can be readily renewed to maintain efficiency.

The Shaft is fitted with renewable sleeves where it is not protected by impeller and balance disc hubs. These are individually fixed to the shaft by keys, the keyways being cut on alternating sides of the shaft to eliminate distortion and ensure a rigid rotating element. The complete assembly is locked in position by double lock nuts at each end of the shaft.