Burks 20522-5 Repair Kit for CS5M Regenerative Turbine Pumps
When a Burks CS5M regenerative turbine pump starts losing pressure, weeping at the shaft, or simply doesn't move the volume it used to, the cause is almost always wear inside the pumping chamber rather than a failing motor. The Burks 20522-5 repair kit is built to address exactly that. It bundles the wear parts that go out of tolerance together — impeller, raceway, shaft seal, O-ring gasket, suction sleeve, impeller locknut, raceway screws, and shaft key — so a rebuild can be completed in one sitting instead of chasing individual part numbers through three different suppliers.
The reason the kit matters is clearance. In a regenerative turbine pump, the gap between the impeller and the raceway is what generates head, and that gap is measured in thousandths of an inch. Impellers and raceways wear as a matched pair, which is why Burks supplies them as a set rather than separately. The kit works hand in hand with the Life-Lok external impeller adjustment feature found on CS5M pumps, letting a technician re-establish proper clearance from outside the casing after the new parts are installed, without pulling the pump back apart. The standard kit ships with a Buna-N shaft seal; alternate elastomer versions of this part number exist for pumps running fluids that Buna-N doesn't tolerate.
CS5M pumps show up in a wide range of settings, and only a fraction of them are anywhere near water. They handle boiler feed and condensate return in commercial buildings, hot water circulation and pressure boosting, coffee and beverage brewing systems, machine tool coolant delivery, spray washing and parts cleaning lines, chemical and solvent transfer, and general industrial process duty where high pressure at low flow is the requirement. Keeping a 20522-5 kit on the shelf turns an unplanned shutdown into a scheduled afternoon of maintenance.
Key Features
- Complete wear-parts rebuild kit for Burks CS5M series regenerative turbine pumps
- Impeller and raceway supplied as a matched set to maintain correct running clearance
- Buna-N mechanical shaft seal included as the standard elastomer configuration
- O-ring gasket, suction sleeve, impeller locknut, raceway screws, and shaft key all included
- Printed installation instructions packed with the kit
- Compatible with the Life-Lok external impeller adjustment system for post-rebuild clearance setting
- Genuine Burks replacement components for correct fit and dimensional accuracy
- Single part number eliminates guesswork and mismatched component orders
- Alternate seal-material versions of this kit are available for aggressive or high-temperature fluids
- Optional Burks 7492 adjustable spanner wrench available separately to assist with adjustment
Applications
- Boiler feed and condensate return systems
- Hot water circulation and pressure boosting
- Coffee, espresso, and beverage brewing equipment
- Machine tool coolant and cutting fluid delivery
- Spray washing, parts washers, and cleaning lines
- Chemical, solvent, and light oil transfer
- Refrigerant and liquefied gas handling
- General industrial process duty requiring high head at low flow
- Fire protection jockey and pressure maintenance service
- Commercial laundry and food processing equipment
Specifications
- Part Number: 20522-5
- Brand: Burks
- Product Type: Pump repair and rebuild parts kit
- Fits: Burks CS5M series regenerative turbine pumps, including 5CS5M, 7CS5M, 10CS5M, 15CS5M, 310CS5M, and 315CS5M
- Also Serves: Burks ES5M series pumps of equivalent build
- Kit Contents: Impeller, raceway, shaft seal, O-ring gasket, suction sleeve, impeller locknut, raceway screws, shaft key, instructions
- Standard Seal Elastomer: Buna-N
- Seal Type: Mechanical shaft seal
- Impeller Construction: Bronze with Monel blades
- Raceway Construction: Bronze with vortex pockets
- Adjustment System: Compatible with Life-Lok external impeller adjustment
- Service Category: Wear-parts replacement and pump overhaul
Frequently Asked Questions
Q: Do I have to replace the impeller and raceway at the same time, or can I install just one?
A: They must go in together. The two parts wear against each other and are machined as a matched set, so installing a new impeller against a worn raceway will not restore the clearance the pump needs to build pressure.
Q: Will this kit work if my pump is running something other than water?
A: The standard 20522-5 ships with a Buna-N seal, which suits water, condensate, and many light oils. For solvents, hot chemicals, or fluids that attack Buna-N, order the alternate elastomer version of the same base part number instead.
Q: Do I need any special tools to complete the rebuild?
A: Standard hand tools cover most of the job. The Burks 7492 adjustable spanner wrench is sold separately and makes setting the Life-Lok clearance considerably easier, particularly on pumps that have been in service a long time.
Q: Does the kit include bearings or a replacement motor shaft?
A: No. It covers the hydraulic wear parts inside the pump chamber. Motor bearings, the shaft itself, and casing hardware are ordered separately if inspection shows they are worn.
Q: How do I confirm this is the right kit before ordering?
A: Check the nameplate on your pump for the full model designation and verify it falls within the CS5M or equivalent ES5M range. If your pump uses a non-standard seal material, note that from the original build sheet so the matching kit variant can be supplied.
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