Shell Omala S4 WE 220
Shell Omala S4 WE 220 is a high-performance synthetic industrial gear oil specifically developed for demanding worm drive applications. Formulated using specially selected polyalkylene glycol (PAG) base fluids combined with advanced additive technology, the lubricant provides outstanding lubrication performance in severe operating conditions. The formulation delivers extended oil life, excellent protection against wear and micropitting, and improved energy efficiency compared with conventional mineral gear oils.
One of the key advantages of Shell Omala S4 WE 220 is its ability to deliver extended lubricant service life. Industrial worm gear systems frequently operate under high loads and elevated temperatures that can accelerate lubricant degradation. Shell Omala S4 WE 220 is formulated to provide excellent oxidation and thermal stability, helping resist the formation of harmful oxidation products during operation. This stability helps maintain system cleanliness and consistent lubrication performance over extended maintenance intervals, allowing operators to reduce downtime and maintenance costs.
Shell Omala S4 WE 220 also offers excellent wear protection and strong resistance to micropitting. Worm gear drives typically experience high sliding contact between gear surfaces, which places significant demands on the lubricant. The advanced additive system provides excellent load carrying capacity, forming a durable lubricating film that protects gears and bearings even under heavy or shock loading conditions. This helps extend the operational life of critical gearbox components and ensures reliable performance in demanding industrial environments.
Another key benefit of Shell Omala S4 WE 220 is its ability to enhance system efficiency. The synthetic PAG formulation provides lower friction characteristics compared with conventional mineral oils, helping reduce operating temperatures and improve the efficiency of worm gear systems. Rig testing and field experience have demonstrated energy efficiency improvements of up to 15% compared with mineral oil-based products and approximately 11% compared with other synthetic hydrocarbon lubricants. This improved efficiency can contribute to reduced energy consumption and improved equipment performance.
Shell Omala S4 WE 220 is recommended for enclosed industrial worm gear reduction systems operating under severe conditions such as high loads, very low or elevated temperatures and wide temperature variations. It is particularly suitable for applications where maintenance access is limited or extended lubricant life is required, including gear motor systems and installations such as yaw gears in wind turbines. The lubricant is also suitable for lubricating bearings and other components in splash or circulating lubrication systems.
Physical characteristics include a kinematic viscosity of approximately 222 mm²/s at 40°C and 34.4 mm²/s at 100°C with a viscosity index of approximately 203. The lubricant has a density of approximately 1074 kg/m³ at 15°C, a flash point of approximately 278°C and a pour point of approximately –39°C, supporting reliable lubrication performance across a wide range of demanding industrial operating conditions.
