HP PARTHAN EP 257 is a high-performance industrial gear oil formulated to deliver excellent lubrication and protection in enclosed gear systems operating under severe load and shock conditions. It bridges the gap between ISO VG 220 and 320 grades, providing an ideal balance of film strength, oxidation resistance, and energy efficiency. Manufactured from premium paraffinic base oils and fortified with an advanced sulfur-phosphorus extreme pressure additive system, HP PARTHAN EP 257 ensures outstanding gear protection against scoring, pitting, and surface wear even in demanding environments. The product’s superior oxidation and thermal stability prevent the formation of sludge and varnish deposits, maintaining system cleanliness and extending oil life. Its inherent anti-rust, anti-corrosion, and anti-foam properties further enhance operational reliability, while its excellent demulsibility ensures rapid separation of water and prevents emulsification in humid or contaminated conditions. HP PARTHAN EP 257 is engineered for consistent performance across a broad temperature range, maintaining viscosity and film strength up to 110°C. This makes it suitable for continuous and heavy-duty industrial operations such as those found in steel plants, cement mills, mining conveyors, paper manufacturing units, and heavy mechanical drives. By minimizing frictional losses and protecting critical gear surfaces under both boundary and hydrodynamic lubrication regimes, HP PARTHAN EP 257 enhances energy efficiency and extends the service life of both oil and equipment. It is the preferred choice for gearboxes requiring a lubricant with intermediate viscosity, superior load-carrying ability, and dependable performance under sustained high-load operating conditions.
| Properties | HP Parthan EP 257 |
|---|---|
| Viscosity, cSt @ 40°C | 240–270 |
| Viscosity Index | 90 |
| Flash Point, COC, °C min | 220 |
| Pour Point, °C Max | -6 |
| Timken OK Load, kg | 60 |
