Rebuild eroded impellers, casings, wear rings, & seal chambers
Efficiency coatings that recover lost performance
No hot work, machine shop, or replacement parts required
The Challenge
Pumps live in the firing line. Impellers cavitate, casings erode, wear rings open up, and internal clearances drift — and as surfaces roughen, hydraulic efficiency falls, energy costs climb, and vibration accelerates secondary damage. Traditional fixes mean welding, machining, or replacement, all of which take the pump out of service for far longer than production can spare.
A Real Rumford Example
Before
The Problem
Impeller Wear
Erosion and cavitation had eaten into the impeller vanes, dropping head and efficiency while pushing power draw up.
Replacement (Parts & Labor)$108,000
Lead Time16–24 Wks
Performance GainNone — Same As Before
Hover for Belzona repair →
After — Belzona
The Solution
Rebuilt & Coated In Situ
Lost metal rebuilt with Belzona composite and the hydrophobic surfaces coated smooth — done on site, with no new impeller to wait for.
Cost Savings$88,500
Time to CoatOne day per Impeller
Electricity ConsumptionReduced by 19.9%
Recent inspections show no measurable impeller wear to date
Belzona Interactive Solution Map
Pumps
Drill into various pump types, click any wear area, and see the proven Belzona repair and protection solution.
Estimated figures based on actual project scope. Actual costs vary by pump size and damage extent — contact us for a project-specific estimate.
Centrifugal, slurry, vacuum, and positive-displacement pumps across every industry suffer erosion-corrosion, cavitation, and abrasive wear. Metal loss on impellers and volutes not only weakens the component — it disrupts flow, drops head and efficiency, and drives up power consumption long before the pump actually fails.
Belzona's metal repair composites rebuild eroded pump components back to profile at ambient temperature, while smooth ceramic-filled coatings restore hydrophobic surfaces and improve efficiency. Applied in situ by Rumford Industrial Group, these repairs return pumps to service in a fraction of the time and cost of replacement.
Belzona Solutions for This Application
Metal Rebuilding & Restoration
Cold-curing epoxy composites restore heavily damaged pump components — including impellers, housings, end covers, valve plates, and rotors — back to their original profile after erosion, corrosion, wear, and cavitation damage.
Erosion, Corrosion & Wear-Resistant Coatings
Ceramic coatings provide long-term erosion-corrosion protection for impellers and casings, with hard-filled variants specifically suited to heavy wear environments like sludge and sewage pumps.
Efficiency Enhancement Coatings
Hydrophobic coatings applied to impellers and casing surfaces reduce turbulent flow and repel process fluids, improving pump efficiency by up to 7% on new equipment and 20% on refurbished units.
Shaft Protection Against Wear & Seizure
Self-lubricating, low-friction coatings protect pump shafts from wear and seizure in service.
What Belzona Can Do for Pumps
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Repair cracked and holed casings
Rebuild cracked, holed, and perforated pump casings in situ with metal repair composites — no welding, no distortion, and no removal from service.
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Repair internal casing damage using forming techniques
Rebuild eroded internal casing surfaces by forming the composite against a former or release-coated mating part to restore the correct profile.
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Rebuild internal casing damage using machining techniques
Overfill damaged internal surfaces, then machine the cured composite back to drawing dimensions and required clearances.
Before
After — Belzona