Shell’s range of turbine oils enables power companies and process plant operators to select an oil that will deliver optimum value to their operations through enhanced protection, long oil life and high system efficiency. Shell Turbo T oil has established a strong track record in power generation in hydro, coal fired power plant steam turbines, light duty gas turbines, geothermal power plants and turbo-compressor applications.
To meet the demands of the latest high-efficiency turbine systems, Shell Turbo S4 X and Shell Turbo S4 GX oils have been introduced. These products use Shell gas-to- liquids base oils with a specially developed additive system to help extend oil life, reduce varnish formation and protect components. The products are designed to offer outstanding, long-term performance under the most severe operating conditions and will help to minimize deposit and sludge formation, even under cyclic peak loading conditions. Minimizing the formation of sludge and bearing deposits reduces wear and can help to reduce the risk of an unplanned turbine shutdown. They provide high resistance to foaming and rapid air release, with good water shedding and corrosion protection.
Shell Turbo S4 X and GX lubricate high temperature gas turbine bearings with minimal deposit build-up or sludge formation. This reduces the potential for critical component failure and the risk of unplanned turbine shutdown. Low deposit formation has been demonstrated in demanding tests such as the Dry TOST test, and resulted in approvals for Shell Turbo S4 X 32 from MHPS and with both Shell Turbo S4 X and Shell Turbo S4 GX 32 being recognized by GE Oil & Gas as low varnishing type turbine oils. Such oils demonstrate the lowest tendency to form varnish and the highest performance in terms of oxidation stability and thermal stability.
Demulsibility, air release, resistance to foaming and viscosity index are critical performance factors for oil in the latest turbine designs, especially turbines that operate at higher temperatures and have smaller oil volumes with shorter oil reservoir residence times. Shell Turbo S4 X and Shell Turbo S4 GX offers excellent performance in all four areas. Shell Turbo S4 GX turbine oil has been developed to meet the demands of the latest high-efficiency turbine systems with gearboxes, offering additional high load carrying capability relative to Shell Turbo S4 X.
Shell Turbo S4 X and S4 GX are approved by major turbine manufacturers, including MAN D&T, Siemens, GE, Alstom, MHPS (Shell Turbo S4 X) and Alstom.
To complement the range of Shell Turbo S4 X, Shell Turbo S4 GX and Shell Turbo T oils, a high performance, fire-resistant EHC fluid Shell Turbo DR 46 is available for use in control systems of steam turbines.