Wartsila MK2 OLS3-P 380 Seal Ring

Wartsila MK2/OLS3-P 380 Seal Ring (SRRMK2380FRAFT)

As a marine engineering expert specializing in propulsion and shaft line architecture, I cannot overstate the critical function of maintaining boundary integrity within oil-lubricated stern tube assemblies. The Wartsila MK2/OLS3-P 380 Seal Ring (MPN: SRRMK2380FRAFT) is an OEM-engineered elastomeric lip seal component custom-built for Wärtsilä Sternguard Mark 2 (OLS3-P) outboard stern tube configurations.

Engineered from high-grade Fluorocarbon Elastomer (Viton), this precision-molded seal ring provides absolute fluid separation between stern tube mineral/synthetic lubricating oils and external seawater environments. It is specifically designed to handle dynamic shaft runout, axial thermal growth, and high-velocity peripheral speeds typical of large commercial and industrial marine propulsion systems.

Model Details

• Manufacturer: Wärtsilä
• Series: Sternguard MK2 / OLS3-P
• Nominal Shaft Diameter: 380 mm
• MPN / Part Number: SRRMK2380FRAFT
• Material Composition: High-performance Viton (FKM) elastomer formulation
• Design Type: Radial lip seal ring with optimized spring-energized garter ring track

Key Features

1. Advanced Viton Elastomer Construction: Manufactured from premium-grade FKM compound, offering exceptional resistance to chemical degradation, seawater corrosion, and high thermal loads.
2. Optimized Lip Geometry: Precision spring-energized sealing lips maintain constant radial contact pressure against the liner, compensating for normal shaft vibration and micro-deflections.
3. Zero-Leakage Environmental Protection: Prevents stern tube oil leakage into marine ecosystems while blocking abrasive silt, sand, and saltwater ingress.
4. OEM Dimensional Precision: Exact manufacturing tolerances ensure effortless seating within MK2 housing grooves without requiring custom field trimming or adaptation.
5. Extended Service Life: Engineered to maximize operational intervals between scheduled drydock overhauls when operated within specified lubrication parameters.

Applications

• Commercial Merchant Vessels (Container Ships, Bulk Carriers, Tankers)
• Passenger Cruise Ships and High-Speed Ferries
• Offshore Support Vessels (OSV, PSV, Anchor Handlers)
• Inland Waterway Vessels and Heavy-Duty Tugs
• Specialized Azimuth Thrusters and Podded Propulsion Units utilizing MK2 architectures.

Frequently Asked Questions

What is the expected service life of the Wartsila MK2/OLS3-P 380 Seal Ring?

Under normal operating conditions and using approved mineral or synthetic lubricants, conventional Viton seal rings are recommended for replacement every 2.5 years (typically aligned with intermediate or special drydock survey cycles).

Can this seal ring be used with Environmentally Acceptable Lubricants (EALs)?

Yes, the Viton formulation of the SRRMK2380FRAFT is fully compatible with standard mineral oils as well as compliant synthetic EALs (bio-oils), though operating temperatures should be closely monitored when running bio-lubricants.

Is the SRRMK2380FRAFT suitable for split or non-split housing setups?

This specific part number is engineered for the OLS3-P execution. Ensure you verify whether your specific vessel arrangement calls for a fully split retrofit variant or a solid ring design prior to ordering.

How do I verify the authenticity of this Wartsila seal ring?

Genuine Wärtsilä seal rings come packaged in original manufacturer anti-corrosion protective wraps, stamped with traceable batch numbers, material compliance markings, and exact dimensional tolerances matching OEM blueprints.