Sovereign 680 Straight Steam Cylinder Oil

Sovereign 680 Straight Steam Cylinder Oil is a premium non-compounded steam cylinder oil from Morris Lubricants, refined to deliver exceptional film strength at very high temperatures. Providing reliable lubrication for bores and valves in steam engines utilising wet or dry steam, it offers superior oxidation resistance and low deposit forming characteristics under extreme conditions of temperature and pressure — making it a trusted choice for demanding steam applications.

Unlike compounded oils, the Sovereign range possesses strong demulsification characteristics, separating quickly and cleanly from water. This makes it the preferred choice where steam is being recovered for use as boiler or process feed. Non-staining and safe on paintwork and brasses, Sovereign 680 meets the requirements of British Rail schedule number MT276 for locomotives running on their lines.

Key Features

• Non-compounded straight steam cylinder oil
• Non-staining and safe on paintwork and brasses
• Excellent film strength at very high temperatures
• Low deposit forming characteristics under extreme temperature and pressure
• Excellent oxidation resistance
• Excellent water separability — separates quickly and cleanly from water
• Recommended where steam condensate is being recovered
• Meets British Rail schedule MT276

Typical Applications

• Steam engines utilising wet or dry steam
• Applications where steam is recovered as boiler or process feed
• Heritage and preserved steam locomotives
• Steam engines operating up to 230 psi

Which Morris Oil Do I Need?

* Where condensate is recovered (Steam Cars and Steam Launches)

Available Sizes