Home Propulsion Compact Seawater Lubricated Propeller Shaft Bearing System

Compact Seawater Lubricated Propeller Shaft Bearing System

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Cost Savings

The COMPAC seawater lubricated propeller shaft bearing system eliminates stern tube oil or oil-based EALs as seawater is used as the lubricant. There is no aft seal, no storage of oil, no sampling of oil, no disposal of oil, and no risk of seawater ingress contaminating the oil. Compared to synthetic EALs that are 500 – 1000% more expensive than mineral oil, seawater is free and recommended by the U.S.A. Environmental Protection Agency to meet Vessel General Permit requirements. Emergency aft seal repairs are not required, as there is no aft seal.

Compliant Operation

All class societies with the exception for NK and KR have modified rules for seawater lubricated propeller shaft systems, allowing the shaft to remain in place if monitoring conditions are met making the COMPAC system comparable to oil lubricated propeller shaft bearings. Thordon’s COMPAC system ensures shipowners/operators that there will be no environmental violations resulting from stern tube oil leakage and meets both U.S. VGP and Polar Code regulations guaranteeing zero risk of pollution.

Compact Ship Owner Benefits

• Reduce operational costs.
• Eliminate aft seal problems.
• Eliminate emergency dockings.
• Fewer components.
• Zero environmental impact.
• Polar Code compliant.
• Meets U.S. VGP requirements.
• Over 2000 ship references.

Compact Seawater Lubricated Propeller Shaft Bearing System
Compact Seawater Lubricated Propeller Shaft Bearing System

Compact Seawater Lubricated Propeller Shaft Bearing System
Compact Seawater Lubricated Propeller Shaft Bearing System

Controlled Bearing Environment

Thordon’s Water Quality Package ensures an adequate supply of clean water is consistently being delivered to both the forward seal and the stern tube bearings. Lubrication of the bearing is assured and a long predictable bearing wear life is achieved. A controlled supply of clean water allows Thordon to offer a lifetime bearing wearlife guarantee.

Easily Machined and Fitted

Thordon COMPAC machines cleanly and produces no airborne machining debris. COMPAC is much lighter than white metal bearings and can be fitted quickly and easily by freezing in liquid nitrogen or dry ice.

Aft COMPAC Bearing System

• COMPAC bearing in bearing carrier with retaining ring.
• Thordon recommended shaft liner in the way of the bearing.
• No aft seal required.

COMPAC Tapered Key Design

• COMPAC split bearing with a tapered keyset allows bearings to be withdrawn, inspected and re-installed in a matter of hours with the shaft in place.

ThorShield Shaft Coating System

• Thordon’s tough new modified epoxy coating ThorShield designed to provide integrity against corrosion.

Fwd COMPAC Bearing System

• COMPAC bearing in a bearing carrier.
• Thordon recommended shaft liner in the way of the bearing.

SeaThigor Mechanical Face Seal

• A robust high performance face seal manufactured for long wear life and reduced maintenance costs for water lubricated marine propeller shafts.

Thordon Water Quality Package

• A Thordon Water Quality Package delivers a consistent supply of conditioned water to both the fwd seal and all bearings. A separate detailed brochure on the Thordon Water Quality Package is available.

Read more : Seawater Lubricated Propeller Shaft Bearing Thordon; Grease Free Rudder Bearings

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