Burks 21123 Cast Iron Pump Case for WA6 series
This is the cast iron pump case Burks supplies as part 21123, for WA6 series pumps. It carries the suction and discharge connections, contains the pressure, and forms the volute that converts impeller velocity into head.
Casings are replaced for three reasons. Erosion wears the volute and the wear ring seat until the clearance around the impeller opens and performance drops off. Corrosion thins the casting from the inside, which is invisible until a weep appears. And freezing or a dropped pump cracks it outright, which at least announces itself.
Casings are model specific. The same Burks family covers several port sizes and duty points on different castings, so the model designation on the nameplate is what identifies the right one - this casting is listed for WA6 series. Check the suction and discharge connections against your pipework before ordering.
Key Features
- Genuine Burks replacement pump case
- Cast iron construction as originally supplied
- Machined for WA6 series pumps
- Original port sizes, bolt pattern and volute geometry
- Restores the pressure boundary and the impeller clearance
- Direct replacement, no modification required
Applications
- Burks WA6 series pump rebuilds
- Replacing a casing cracked by freezing or impact
- Repairing corrosion or erosion damage inside the volute
- Recovering performance lost to a worn volute passage
- Returning a long-service pump to standard dimensions
- Industrial, marine and dockside installations
Specifications
- Brand: Burks
- Manufacturer: Crane Pumps and Systems
- Manufacturer Part Number: 21123
- Part Type: Pump Case
- Material: Cast iron
- Fits: Burks WA6 series self-priming centrifugal pumps
- Condition: New
Frequently Asked Questions
Q: How do I identify which casing my pump takes?
The nameplate model designation is the reliable answer. Failing that, the port sizes, the bolt pattern and the casting number on the old part together will narrow it down.
Q: Does a new casing need any machining before fitting?
No. It is supplied finished to the original Burks dimensions and goes on as it comes. What does need attention is the mating face on the adapter, which should be cleaned back to bare metal before the new gasket goes on.
Q: How can I tell whether the volute is worn rather than the impeller?
Look for a polished or grooved band in the passage opposite the impeller tips and measure the clearance at several points around the circumference. Even wear that has opened the gap all the way round points at the casing rather than at a damaged impeller.
Q: Can the pump be run with the old studs and nuts?
Only if they are sound. Stretched studs, damaged threads and corroded nuts all give uneven clamping, which is the usual reason a new gasket weeps on a joint that was otherwise fine.
Not sure this is the right part? Send us a Picture of the pump plate on your pump and the CLR Marine team will confirm the correct pump case before you order.
CLRMarine
