Components: what fails and what we do about it
|
Component |
Typical failure |
Precise Mechanical fix |
|---|---|---|
|
Rotor |
Blade tip erosion and cavitation pitting, shroud wear, scale buildup, cracked blades, worn or corroded hub bore |
Rotor repair: weld and re-machine blade tips and shroud faces, clad wear faces in 304L/316L, re-bore hub; new rotors manufactured when cracking or wasting is beyond repair |
|
Cone (single or dual cone pumps) |
Pitting and grooving of the port face from seal water and fiber, out-of-round wear, corrosion under the cone seat |
Cone repair: build up and re-machine to original taper and clearance; stainless steel cladding of the port face; new cones manufactured in cast iron or clad |
|
Head and port plate (flat-sided pumps) |
Scored and eroded port faces, warped or cracked heads, wasted sealing surfaces |
Re-machine port faces flat and to tolerance, clad in 304L/316L, weld repair cracks in cast iron, manufacture new heads and port plates |
|
Shaft |
Scoring and corrosion under sleeves and seals, bent shafts, worn bearing journals, keyway damage |
Straighten and re-machine journals, sleeve or metal-spray and grind, or manufacture new shafts in carbon steel or stainless |
|
Bearings, housings and brackets |
Bearing failure from misalignment or water contamination, fretted housing bores, cracked brackets |
Bore and sleeve housings back to size, weld repair cast iron brackets, supply new bearings and housings |
|
Seals and packing |
Leaking mechanical seals, worn stuffing boxes, scored sleeves |
Supply mechanical seals and packing sets, re-machine stuffing boxes, new shaft sleeves |
|
Lobes and body sections |
Wall loss from corrosion, erosion at the inlet, cracked ribs and feet |
Cast iron weld repair, re-machine mating faces and fits, clad interior surfaces, manufacture new lobes and body sections |
|
Casing |
Cracked casing, corroded flange faces, worn bore, broken feet |
Cast iron welding and re-machining, flange facing, bore restoration; new casing where the original is beyond repair |
Which route we take depends on the condition of the part and the service it goes back into. We tell you after inspection, with photos.
