ServoFriz NH 68 is a premium-grade refrigeration compressor oil specially formulated for ammonia-based refrigeration systems used in ice plants, cold storages, and large industrial cooling units. This high-performance lubricant is designed to deliver exceptional lubrication, superior thermal stability, and long service life in heavy-duty refrigeration compressors operating under low temperatures and high pressures. Developed from highly refined paraffinic base oils with excellent chemical and oxidation stability, ServoFriz NH 68 provides consistent performance, effective protection, and operational reliability in demanding refrigeration environments. The formulation of ServoFriz NH 68 includes a balanced additive system that imparts excellent anti-wear, rust-prevention, and oxidation-resistant properties. It ensures smooth operation of compressor components by maintaining a strong lubricating film on moving parts, even in extreme temperature conditions. With its kinematic viscosity of 62–74 cSt at 40°C, flash point of 170°C, and pour point of (-24°C), this oil demonstrates stable viscosity characteristics and superior fluidity, guaranteeing consistent lubrication during both startup and continuous operation. The result is reduced wear on pistons, bearings, and valves, leading to improved compressor efficiency and extended equipment life. ServoFriz NH 68 has been specifically developed for ammonia refrigeration systems where compatibility, stability, and resistance to oil degradation are critical. Its high thermal and oxidation stability minimizes sludge formation, varnish deposits, and carbon buildup, ensuring clean compressor internals and minimizing maintenance downtime. The oil’s outstanding demulsibility ensures rapid separation from water and other contaminants that may enter the system, protecting internal metal surfaces from corrosion and rust. This feature is particularly beneficial in environments where condensation and moisture ingress are common. The strong film strength and low volatility of ServoFriz NH 68 make it suitable for both reciprocating and rotary-type compressors. It helps maintain proper sealing in compressor chambers, prevents refrigerant leakage, and contributes to consistent cooling performance. Its resistance to ammonia attack ensures chemical stability and long-lasting protection, making it the preferred choice for industrial applications where ammonia is used as a refrigerant. ServoFriz NH 68’s superior lubrication properties also contribute to improved energy efficiency, allowing compressors to run cooler and smoother while reducing power consumption. Its balanced formulation provides long oil drain intervals, making it a cost-effective solution for large-scale refrigeration systems that operate continuously over extended periods. The product’s proven field performance has made it widely used across various industries such as food and beverage processing, frozen storage facilities, chemical manufacturing, and dairy operations. In summary, ServoFriz NH 68 is a highly reliable and durable refrigeration compressor oil engineered to deliver maximum protection and performance in ammonia-based refrigeration systems. Its strong anti-wear characteristics, excellent water separation, and resistance to oxidation make it ideal for critical industrial cooling applications. With its superior film strength, extended service life, and outstanding stability under extreme conditions, ServoFriz NH 68 ensures efficient compressor operation, reduced maintenance costs, and dependable system performance in even the harshest working environments.
Meets requirements of:
- Ammonia refrigeration compressor being used in Ice Plants & Cold Storage refrigeration systems.
| ISO VG | NH 68 |
|---|---|
| Kinematic Viscosity cSt @ 40°C | 64-72 |
| Flash point (COC), °C Min. | 170 |
| Pour Point, °C Max. | (-)24 |
| TAN, mg, KOH/gm, Max | 0.05 |
