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COMPAC

Rotary Vane Steering Gear · Steering Gear

Technical data from manufacturer or class sources · not yet verified by a person​​‌‍‌‍⁠‌​​​‌​⁠‍‌‍​​​
Torque per manufacturer datasheetCapacity
Hydraulic OilMedium

On modern ships, hydraulic systems play a critical role in steering and stabilizing the vessel, where reliable torque transmission is essential. The Thordon COMPAC, designed to handle torque requirements, operates within a hydraulic oil medium to ensure smooth and efficient performance. Certified by DNV, the model TAM000001G is specifically engineered for marine applications, where maintaining system integrity is paramount. Common issues include bypass leaks caused by flap seal failures in rotary vane types, bearing damage in the hydraulic pump motor after extended operation, and magnetic valve blockages due to oil contamination. To prevent such failures, it is recommended to keep a seal kit and solenoid valves on board, with a lead time for replacement parts ranging from 3 to 8 weeks. Regular maintenance includes hydraulic oil analysis every six months and flap seal inspection during docking. Additionally, monthly manual steering exercises and a mandatory SOLAS hard-over test, which must be completed within 28 seconds, are crucial for operational safety and compliance.

Manufacturer documentation

Images from manufacturer documentation.

Photos, drawings and page previews from this model’s datasheet or catalog.

COMPAC seawater lubricated open system uses seawater as the lubrication medium in place of oil.Source: Thordon Bearings Thordon COMPAC datasheet, p. 6

Applications

  • reduce start-up friction
  • eliminate stick-slip
  • promote early formation of a hydrodynamic film

Features

  • long bearing wear life
  • eliminate oil
  • withstand high shock loads and edge loading
  • special lubricants for low coefficient of friction
  • smooth lower portion for hydrodynamic film
  • grooves in upper half for water lubricant flow

Options

  • Sea Thigor mechanical face seal
Source: Thordon Bearings Thordon COMPAC datasheet, p. 11
Thordon Bearings Thordon COMPAC – Photo (45876eac7682_S6-26 S. 6)
Photo · 45876eac7682_S6-26 · S. 6
Thordon Bearings Thordon COMPAC – Photo (45876eac7682_S6-26 S. 9)
Photo · 45876eac7682_S6-26 · S. 9
Thordon Bearings Thordon COMPAC – Photo (45876eac7682_S6-26 S. 11)
Photo · 45876eac7682_S6-26 · S. 11
Thordon Bearings Thordon COMPAC – Photo (45876eac7682_S6-26 S. 11)
Photo · 45876eac7682_S6-26 · S. 11
Thordon Bearings Thordon COMPAC – Photo (45876eac7682_S6-26 S. 12)
Photo · 45876eac7682_S6-26 · S. 12
Thordon Bearings Thordon COMPAC – Photo (45876eac7682_S6-26 S. 13)
Photo · 45876eac7682_S6-26 · S. 13
Thordon Bearings Thordon COMPAC – Photo (45876eac7682_S6-26 S. 14)
Photo · 45876eac7682_S6-26 · S. 14
Thordon Bearings Thordon COMPAC – Photo (45876eac7682_S6-26 S. 15)
Photo · 45876eac7682_S6-26 · S. 15
Source: Thordon Bearings Thordon COMPAC datasheet, p. 8
Service

Service notes.

What our service work and the manufacturer documentation say about keeping this model running.

Hydraulic oil analysis every 6 months. Blade seal inspection at drydock. SOLAS hard-over test (28 seconds). Emergency steering drill monthly.

Inspection

Common failures & inspection points

Spares

Replacement Parts

Spare parts notes

Thordon Bearings Inc.: Keep a seal kit and solenoid valves on board. Lead time: 3-8 weeks.

Classification

DNV type approval

Listed in the DNV Approval Finder at the time we recorded it. The certificate is issued by DNV, not by us; check its current status at DNV.

CertificateTAM000001G
Open the certificate at DNV
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