Product Specifications
1. Structure: Volute casing for horizontal centrifugal pump, flanged inlet & outlet on both sides, integrated mounting base at bottom
2. Main Material: HT200 grey cast iron, vibration resistant and high mechanical strength
3. Liner Part: Built-in tin bronze wear bushing to reduce friction loss of pump shaft
4. Surface Finish: Marine-grade green anti-rust & anti-corrosion coating, salt-fog resistant
5. Connection Type: Flanged inlet and outlet with standard bolt holes
6. Manufacturing Process: One-piece sand casting + CNC precision machining, tight tolerance for rabbet and threaded holes
7. Working Medium: Seawater, fresh water, marine ballast water, bilge water
8. Medium Temperature: 0~80℃
9. Working Condition: Marine ballast system, continuous seawater transfer, pressure rating compliant with marine centrifugal pump design
10. Compatibility: Fits horizontal marine centrifugal ballast pump, available as replacement spare part
Product Advantages
1. High-strength cast iron material, resistant to seawater erosion, crack & deformation, stable pressure bearing
2. Built-in brass bushing to reduce shaft wear and extend overall service life
3. Standard flange connections for easy alignment, compatible with multiple marine ballast pump models
4. One-piece cast volute with smooth hydraulic channel to minimize hydraulic loss
5. Salt spray resistant anti-corrosion coating against humid and salty cabin atmosphere
6. Precision machining, controlled tolerance for rabbet and bolt holes for high assembly accuracy
Maintenance
1. Daily Inspection: Regularly check casing surface for corrosion, cracks and leakage; inspect sealing condition of flange joints.
2. Periodic Overhaul: During ship dry-docking, disassemble pump casing, inspect erosion wear of internal volute passage; measure wear clearance of bronze bushing, replace bushing once clearance exceeds limit.
3. Cleaning: Remove marine organism and sediment buildup inside casing to avoid flow blockage and efficiency drop.
4. Anti-corrosion: Repair chipped coating and re-apply anti-corrosive paint to protect cast iron substrate from seawater rust.
5. Assembly Notes: Ensure coaxiality of impeller and pump shaft during reassembly. Tighten flange bolts evenly to prevent casing crack caused by uneven stress.
6. Storage: For long-term spare part storage, keep in dry & ventilated space, seal flange ports and apply internal rust protection.
Spare Parts
The following related spare parts can be ordered separately to match this pump casing:
Pump shaft, impeller
Shaft sleeve, bronze bushing
Mechanical seal / packing seal assembly
Flange gaskets, bolt sets
Pump cover, bearing housing assembly
Note: This listing only includes pump casing with built-in bronze bushing. Other spare parts shall be purchased separately.
Acceptance Standard
1. Visual Inspection: No blowholes, sand holes, shrinkage porosity or obvious cracks on casting surface; uniform and intact coating without large peeling.
2. Dimensional Check: Flange OD, bolt hole pitch, rabbet diameter and base mounting hole dimensions comply with drawing requirements.
3. NDT (Optional): Penetration testing (PT) can be arranged on request to detect casting defects.
4. Pressure Test (Optional): Hydraulic shell test at pump design pressure, hold pressure with no leakage or deformation.
5. Document Check: Factory test certificate supplied with goods. Marine survey certificate available upon advance application.
6. Receiving Inspection: Inspect package after arrival, verify model & dimension, check transport damage. Please raise claims within 48 hours if any defect found.
Application Scenarios
1. Ocean-going bulk carriers, container ships, oil tankers: Spare casing for main ballast pumps, for ballast operation and vessel stability control.
2. Engineering vessels, dredgers, tugboats: Replacement casing for ballast pumps and bilge pumps, transferring seawater and bilge wastewater.
3. Offshore platforms: Casing replacement for seawater lift pumps and ballast regulating pumps, seawater circulation service.
4. Yachts, work boats: Maintenance spare parts for small marine centrifugal ballast pumps.
5. Shipyards: Spare part stock for dry docking and routine vessel repair projects.
6. Marine equipment suppliers: Inventory of marine pump spares for emergency on-board replacement.
FAQ:
Q1: What material is this pump casing? Can it be used with seawater?
A: Main body is cast iron with internal wear-resistant brass bush, anti-corrosion coating applied. It is suitable for marine seawater ballast service. Regular inspection and maintenance are recommended under long-term seawater conditions.
Q2: Can I purchase only the pump casing without impeller and shaft?
A: Yes, this listing is for pump casing only as a separate spare part. Impeller, shaft and seals can be ordered separately.
Q3: Can flange dimensions be customized?
A: Stock items follow flange size shown in picture. Custom casting & machining is available per customer drawings, lead time to be confirmed separately.
Q4: What type of marine ballast pump does it fit?
A: Fits horizontal marine centrifugal ballast pumps. Please check mounting dimensions and flange bolt holes of your old casing before order to verify compatibility.
Q5: Does this product come with marine survey certificate?
A: Standard stock goods do not include survey certificate. Certification service is available with extra cost and lead time.
