Mechanical Seals - Engine Room Consumables and Spares
Mechanical seals are rotating-shaft sealing assemblies used on marine pumps and auxiliary machinery to prevent leakage of seawater, freshwater, fuel oil, lubricating oil, and other fluids. They are common engine-room consumables and replacement spares for centrifugal, screw, and circulating pumps.
ProShipWorks provides end-to-end support to source and supply Mechanical Seals for marine vessels, ship operators, industrial facilities, maintenance teams and procurement departments.
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Product Information
| Product Name | Mechanical Seals |
|---|---|
| Product Category | Engine Room Consumables and Spares |
| Product Reference | 1406 |
| Brands / Manufacturers | John Crane, EagleBurgmann, AESSEAL |
| Unit of Measure | Piece |
Key Features
| Key Feature |
|---|
| 1. Prevents leakage along rotating pump shafts |
| 2. Available in cartridge and component designs |
| 3. Face materials include carbon, silicon carbide, and tungsten carbide |
| 4. Elastomers available in NBR, EPDM, FKM, and PTFE |
| 5. Designed for specific shaft diameter, pressure, speed, and fluid conditions |
Applications of Mechanical Seals
| Application |
|---|
| 1. Sea-water and central-cooling pumps |
| 2. Freshwater, ballast, bilge, and fire pumps |
| 3. Fuel-oil, lubricating-oil, and boiler-feed auxiliary pumps |
Models & Manufacturers
| Model | Manufacturer |
|---|---|
| Type 21 | John Crane |
| Type 48 | John Crane |
| MFL85N | EagleBurgmann |
| M7N | EagleBurgmann |
| M01 | AESSEAL |
Technical Specifications
| Model | Specification | Value | Unit |
|---|---|---|---|
| Type 21 | Typical shaft diameter range | Approximately 18-100 | mm |
| MFL85N | Seal design | Balanced cartridge mechanical seal | — |
| M7N | Seal design | Component mechanical seal | — |
| M01 | Seal design | Component mechanical seal | — |
| General | Common face material combinations | Carbon versus silicon carbide or tungsten carbide | — |
Standards, Certifications & Class Approval
Review the available standards and approval information relevant to the product. Actual certification, material traceability, inspection and classification requirements depend on the product type, intended application and purchasing specification.
| Applicable Standards & Certification | Common dimensional and design references include EN 12756 and ISO 3069. API 682/ISO 21049 may apply to specified process-pump seal arrangements, but is not universally applicable to marine engine-room pumps. Material and pressure ratings must be confirmed from the manufacturer. |
|---|---|
| Class Approval | Mechanical seals are not generally individually type-approved by DNV, ABS, Lloyd's Register, BV, or ClassNK. Class requirements may apply to the complete pump, piping system, or safety-critical installation; any required approval should be confirmed with the vessel's classification society and equipment manufacturer. |
Installation, Maintenance & Safety Information
| Installation Notes | Verify shaft diameter, seal chamber dimensions, rotation, pressure, temperature, fluid compatibility, and elastomer material before installation. Clean the shaft and seal faces, protect elastomers from damage, lubricate only with a compatible medium, and follow the manufacturer's setting and tightening instructions. Never run the seal dry. |
|---|---|
| Maintenance Tips | Inspect for leakage, abnormal noise, overheating, vibration, and worn shaft sleeves. Check pump alignment, bearing condition, flush or cooling supply, and operating conditions. Replace damaged seal faces, springs, O-rings, and gaskets; store spare seals clean, dry, sealed, and away from heat, ozone, and direct sunlight. |
| Safety Notes | Isolate, depressurize, drain, and cool the pump before seal work. Follow lockout/tagout procedures and use suitable PPE for fuel, oil, chemicals, hot water, and seawater. Confirm the pump cannot start remotely. Dispose of contaminated seals and fluids in accordance with vessel and environmental procedures. |
Request a Quote for Mechanical Seals
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- ETA / vessel schedule
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- Required quantity
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