Overview
High-temperature special grease is engineered to withstand extreme heat, often exceeding 200°C, without losing lubricity or breaking down. Unlike conventional greases, it uses synthetic base oils (e.g., silicone, PAO) and advanced thickeners like PTFE or lithium complex. These greases are critical in industries where equipment operates under continuous high stress and heat, such as steel manufacturing, aerospace, and heavy machinery. Their formulations often include anti-wear additives and oxidation inhibitors to extend service life.
Physical and Chemical Properties
The grease exhibits exceptional thermal stability, with dropping points above 250°C and minimal evaporation loss. Its consistency (NLGI grade) typically ranges from 1 to 3, ensuring adhesion under high-speed conditions. Chemically, it resists oxidation and sludge formation, even in prolonged exposure to oxygen. Additives like zinc or molybdenum disulfide enhance load-bearing capacity, while inert thickeners prevent coking at extreme temperatures.
Main Applications
Primary uses include lubricating industrial oven chains, kiln bearings, and turbine assemblies. In automotive sectors, it’s applied to wheel bearings, brake components, and exhaust system parts. The aerospace industry relies on specialized HT greases for landing gear and engine accessories. Its non-melting property ensures reliability in confined spaces where liquid lubricants might leak.
Safety and Storage
While generally non-hazardous, avoid skin contact due to potential irritation from additives. Store in original containers to prevent contamination; shelf life is typically 2–3 years if unopened. Disposal must comply with local regulations—most HT greases are non-biodegradable. In case of spills, use absorbents like vermiculite and avoid flushing with water.
B2B Procurement Guide
Specify the maximum operating temperature, load requirements, and compatibility with seals/materials (e.g., plastics). Bulk purchases (drums or pails) reduce costs but require proper handling equipment. Certifications like NSF or MIL-PRF-81322 may be necessary for food-grade or aerospace applications. Request technical datasheets to verify performance metrics like four-ball wear tests.
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