Flash point provides a key safety parameter for handling and storage of flammable liquids. Changsha Friend’s Automatic Open Cup Flash Point Tester standardizes the open‑cup method (ASTM D92/ISO 2592), automating ignition, detection, and reporting to improve repeatability and safety.

In industrial lubrication and gear applications, water contamination can form stable emulsions that degrade film strength and promote corrosion. The Water Separability of Petroleum Oils and Synthetic Fluids Tester from Changsha Friend Experimental Analysis Instrument Co., Ltd. quantifies a fluid’s ability to shed entrained water, following standards such as ASTM D1401.

Under boundary and mixed lubrication regimes, anti‑wear additives in oils form protective films to prevent metal‑to‑metal contact. Changsha Friend’s Lubricant Anti‑Wear Performance Tester quantifies a lubricant’s protective capability through standardized sliding or rolling contact tests, delivering key metrics for formulation and quality control.

Evaporation of volatile components in lubricating oils can lead to viscosity changes, deposit formation, and increased oil consumption. The Lubricating Oil Evaporation Loss Tester by Changsha Friend Experimental Analysis Instrument Co., Ltd. measures an oil’s resistance to volatility by determining weight loss under standardized high‑temperature and airflow conditions.

Fretting wear arises when two surfaces in contact experience small oscillatory motions, leading to surface damage, debris generation, and component failure. In applications such as splines, bearings, and electrical connectors, effective grease lubrication is essential to prevent fretting. Changsha Friend’s Fretting Wear Protection by Lubricating Greases Tester provides quantitative evaluation of grease formulations under controlled load, motion, and temperature conditions.