Dongguan HydroBlue Co., Ltd.
| Pump Package | Carton and Wooden Cases |
| Material 2 | Stainless Steel, Duplex Ss, Cast Alloy Steel |
| Trademark | HydroBlue |
| Production Capacity | 10, 000 Tons Per Year |
| Material 1 | Cast Iron, Wear-Resistant Cast Iron, Cast Steel |
| Origin | China |
| Certificate | ISO9001:2015, ISO14001:2004, API Specification Q1 |
| Specification | According to the drawings |
| HS Code | 8413910000 |
| Material Standard | ASTM, ANSI, SAE, Uns, DIN, En, ISO, Toct |
| Mould | Investment Casting Mould, Sand Casting Mould |
| Types of Welding Parts | OEM/ODM |
| Transport Package | Carton and Wooden Cases |
| Testing | Dynamic Balancing |
| Model NO. | Pump Bearing Housing |
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Product Specification
| Pump Package | Carton and Wooden Cases | Material 2 | Stainless Steel, Duplex Ss, Cast Alloy Steel |
| Trademark | HydroBlue | Production Capacity | 10, 000 Tons Per Year |
| Material 1 | Cast Iron, Wear-Resistant Cast Iron, Cast Steel | Origin | China |
| Certificate | ISO9001:2015, ISO14001:2004, API Specification Q1 | Specification | According to the drawings |
| HS Code | 8413910000 | Material Standard | ASTM, ANSI, SAE, Uns, DIN, En, ISO, Toct |
| Mould | Investment Casting Mould, Sand Casting Mould | Types of Welding Parts | OEM/ODM |
| Transport Package | Carton and Wooden Cases | Testing | Dynamic Balancing |
| Model NO. | Pump Bearing Housing | ||
| High Light | Andritz centrifugal pump bearing housing ，Spare parts Asp500-460A pump ，12 P.S pump bearing housing | ||
Dongguan HydroBlue Co., Ltd. supplies replacement bearing housings for ANDRITZ process, slurry, and vertical turbine pumps. Our eight-person engineering team covers mechanical design, casting metallurgy, and precision machining, with research collaborations at Jiangsu University, Chinese Academy of Sciences, and Guangdong University of Technology. We also supply complete pump spares, mechanical seal assemblies, VFD cabinets, motor control enclosures, and provide overseas field engineering support including 3D scanning of worn components.
Send us your ANDRITZ pump model and bearing housing photos for a repair assessment and quotation.
|
Defect |
Visual Check |
Cause |
|---|---|---|
|
Bore wear / scoring |
Circumferential grooves or scratches visible on bearing seat surface. Fingernail catches on the groove edge |
Bearing outer race creep in the bore due to insufficient interference fit; debris trapped between bearing OD and housing bore; fretting from vibration |
|
Seal groove erosion |
Pitting or material loss at the lip seal contact path. Seal groove depth has increased from original |
Abrasive particles in lubricant acting as grinding paste between the shaft seal lip and the groove surface; chemical attack on housing material |
|
Flange face corrosion |
Uneven surface, rust scale, or pitting on the register face and bolt hole area. Gasket surface is no longer smooth |
Long exposure to moisture trapped between housing and casing; galvanic corrosion between cast iron and stainless steel fasteners in wet environment |
|
Casting crack |
Clean the surface with solvent. Apply dye penetrant. A red indication line appears after 10–15 minutes |
Stress concentration at sharp internal corners; thermal shock from quenching hot housing in cold water; impact damage from dropped housing during maintenance |
|
Thread damage (bolt holes) |
Bolt cannot be turned by hand past the first few threads. Cross-threading or stripped threads visible on inspection |
Over-torquing or cross-threading during assembly; galvanic corrosion seizing the fastener in the thread |
|
Condition |
Repair Possible? |
Method |
Relative Cost |
|---|---|---|---|
|
Bore wear ≤ 0.15 mm oversize |
Yes |
Line-bore to next oversize and fit undersize bearing; or machine out and press in a stainless steel sleeve (0.5–1.0 mm wall), then machine to H7 bore |
30–50% of new |
|
Bore wear > 0.15 mm |
No — replace |
— Wall thickness insufficient for sleeving; risk of through-wall machining |
— |
|
Seal groove erosion ≤ 0.5 mm |
Yes |
Machine groove deeper to clean surface; use a slightly thicker seal lip or a spacer behind the seal. Must confirm remaining wall thickness |
15–25% of new |
|
Flange corrosion (local) |
Yes |
Grind out pits; fill with metal-filled epoxy; re-face on lathe or milling machine. Machine flatness to ≤ 0.05 mm/m |
20–35% of new |
|
Casting crack (non-critical area) |
Conditional |
Stop-drill both ends; V-grind; weld with matching filler rod (preheat 200–300°C for cast iron); stress relieve; re-machine affected surfaces. Only if crack does not intersect a pressure boundary or a bearing bore |
40–60% of new |
|
Casting crack intersecting bearing bore |
No — replace |
— Welding will distort the bore beyond recoverable tolerance |
— |
|
Thread damage (1–2 holes) |
Yes |
Drill out; tap for helical insert (e.g. Heli-Coil or Time-Sert). Ensure sufficient wall thickness around the hole for insert installation |
5–10% of new |
|
Multiple stripped threads or cracked web |
No — replace |
— Structural integrity compromised |
— |
|
Original Material |
Upgrade Option |
Benefit |
|---|---|---|
|
GG25 cast iron |
GGG40 ductile iron |
+60% tensile strength; better impact and vibration resistance; reduced risk of cracking at bolt hole and internal corner areas |
|
GG25 cast iron (corrosive service) |
GG25 + internal epoxy coating, or upgrade to ductile iron + coating |
Coating provides a barrier against the corrosive media; longer service life between overhauls |
|
Cast iron (high-temperature pump) |
WCB cast steel |
Retains mechanical strength above 200°C where cast iron begins to lose creep resistance |
Q1: Can a cast iron bearing housing be welded?
Yes, but with significant precautions. Cast iron welding requires preheating the entire housing to 200–300°C, using nickel-based filler rod (ENiFe-CI or ENi-CI), and post-weld slow cooling in an insulating blanket. Even with these measures, the heat-affected zone may develop hard spots that are difficult to machine. We only recommend welding for non-critical crack repairs, not for bearing bore areas.
Q2: How much does it cost to bore and sleeve a bearing housing compared to buying a new one?
Boring and sleeving typically costs 30–50% of a new housing, depending on the bore size and sleeve material. However, the total cost must include the risk of alignment error between the sleeved bore and the other bore. If both bores need sleeving, a new housing is usually the better option.
Q3: My bearing housing has been in service for 15 years and is still within tolerance. Should I replace it proactively?
Not necessary if the bores are within tolerance, the register fit is tight, and there is no corrosion or cracking. However, we recommend ordering a replacement housing while the original is still in production, especially for pumps that are critical to plant operation. An obsolete housing that fails unexpectedly can take 10–12 weeks to reverse-engineer and cast.
Q4: Can you upgrade an oil-lubricated housing to grease-lubricated, or vice versa?
Yes. Grease-to-oil conversion requires machining oil return passages and adding a drain/fill port. Oil-to-grease conversion requires adding a grease relief port and potentially a different seal configuration. Both are feasible on most housing designs, provided the internal cavity geometry can accommodate the change.
Q5: What warranty applies to replacement housings?
12 months from commissioning or 18 months from shipment. Covers material defects, dimensional non-conformance, casting soundness, and coating adhesion (where applied). Damage from improper repair attempts before replacement, corrosion from incompatible media, and installation-related distortion are excluded.
Company Details
Business Type:
Manufacturer,Trading Company
Year Established:
2006
Total Annual:
$10 Million-US$50 Million
Employee Number:
50~100
Ecer Certification：
Verified Supplier
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