Securing components (like impellers, diffusers, or balance drums) onto the shaft of a boiler feed pump (BFP) is one of the most demanding applications in power generation. This joint is subjected to extremely high axial thrust, massive radial forces, high rotational speed, and relentless exposure to hot, pressurized water (often up to 200∘C or more). Any micro-movement leads to wear, imbalance, loss of efficiency, and catastrophic failure of the pump, which is critical to plant operation.
INCURE WeldLock™ 365 Retaining Compound
For securing BFP components—where maximum shear strength, high-temperature resistance, and absolute rigidity against both torque and massive axial thrust are paramount—the WeldLock™ 365 provides the highest structural integrity. Its superior strength ensures impellers and sleeves cannot shift, maintaining the critical clearances necessary for high-pressure, multi-stage pump operation.
| Feature & Benefit | Technical Insight for BFP Components | Conversion Value |
| Highest Strength (365) | Cures to an extremely high-shear strength, rigid plastic, providing maximum resistance to torsional slip and extreme axial thrust (from high-pressure stages). | Zero Slippage: Guarantees absolute 100%torque transmission and prevents fretting corrosion. |
| High Temperature Resistance | Withstands continuous operational temperatures up to 200∘C (392∘F), essential for pumps handling boiler feed water. | End the Heat Threat: Ensures the bond remains strong and rigid under maximum thermal load. |
| Fills Close Clearance Gaps | Ideal for components with an interference or true close-tolerance slip fit (less than 0.05 mm diametral clearance) typical of precision pump builds. | Maximizes Concentricity: Converts the fit into an integrated component, optimizing balance and hydraulic efficiency. |
| Hot Water/Chemical Immunity | Inert to pressurized hot water, steam condensate, and common water treatment chemicals, ensuring the integrity of the joint is protected. | Reliability Assured: The bond remains permanently intact despite harsh fluid exposure. |
Application Steps: Locking BFP Components for Maximum Plant Reliability
Preparation (Critical): Thoroughly clean both the component bore (impeller, sleeve, etc.) and the pump shaft surface. Remove all oil, grease, rust, and residue. Use a powerful degreasing solvent (like acetone or industrial cleaner) and wipe until both metal surfaces are perfectly dry.
Application: Apply a continuous, liberal bead of WeldLock™ 365 evenly around the shaft surface. Alternatively, apply it to the inside circumference of the component bore. Ensure the compound completely covers the mating area.
Assembly: Press or slide the component onto the shaft. Ensure the component is seated correctly (axially) and wipe away any excess compound immediately.
Curing Time (Mandatory): Allow a full 24 hours for the compound to reach full cure strength before continuing final assembly (seals, casing) or operating the pump. This is critical for maximum structural integrity.
Stop risking catastrophic failure and ensure your boiler feed pump components are absolutely locked in place.