Some duties need water pushed to a higher head than one impeller can reach. A two stage split casing pump passes the water through two impellers in turn to build that head.
Its casing still splits along the shaft, so even this larger pump can be opened for service without breaking the pipework.
This guide explains what a two stage split casing pump does, where it fits, and how to keep it reliable.
What This Pump Does
The pump has two impellers on one shaft, and the water passes through the first and then the second.
Each impeller adds to the head, so together they lift the water higher than a single stage pump would.
The split casing lets the whole pump be opened to reach both impellers when service is due.
Where It Fits in the Plant
High head water duties, where water must be pushed up or over a long line, suit a two stage pump.
It handles these duties in the steady, large volumes a plant needs while reaching the head the line demands.
By reaching the higher head, it saves running two pumps in series for the same duty.
Signs the Pump Needs Attention
A two stage pump in trouble shows up in head and running.
- The head falling below what the duty needs
- Flow dropping off
- Leaks at the casing joint or seals
- Vibration from wear or misalignment
- Bearings running hot
What Makes a Good Two Stage Pump?
This pump is judged by steady high head and easy service.
Steady High Head
The two impellers must work together to hold the head the duty needs. Steady head is the reason for the second stage.
Easy Access for Service
The split casing keeps even a two stage pump easy to open. Easy access keeps servicing quick.
Keeping the Pump Running
Routine attention keeps a two stage pump reaching its head.
- Watch the head and flow the pump delivers
- Check the casing joint and seals for leaks
- Keep the pump and drive in alignment
- Maintain bearings for reliable running
Common Questions About Two Stage Split Casing Pumps
Two impellers in turn build a higher head than one impeller can reach, so the pump can push water up or over a long line.
On high head water duties across the plant, where water must be lifted or driven a long way at steady volume.
Yes. The casing splits along the shaft, so even a two stage pump can be opened to reach both impellers without breaking the pipework.
Watching head and flow, checking the casing joint and seals, holding alignment, and maintaining bearings keep it running.
Reach the Higher Head
A two stage split casing pump reaches a higher head with two impellers while staying easy to service. That suits it to demanding water duties.
If a duty needs more head than one pump gives, a two stage pump fits. Explore our pumps and plant equipment for the right size.
See our range of pumps and reach higher heads with a pump built for demanding water duties.
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