This category includes different fluids used in aerospace and industrial applications including hydraulic oils and fluids, transmission, brake, metalworking as well as cleaners, corrosion Inhibitors and coolants/anti-freeze fluids. Such fluids are offered in different viscosities, viscosity indices, oxidation stability, wear resistance, seal compatibility and additives to serve application requirements.
Hydraulic oils are the most common form of hydraulic fluids. Quite often these two terms are used interchangeably. However their key difference between the two is that hydraulic fluids are used in automatic transmissions in automobile systems whereas hydraulic oils can not be used for this purpose.
Coolant fluids are often used in engines (mostly automobile ones) to keep their temperatures at a regulated level. Their use today in aircraft engines is limited as most of them are air-cooled. Hydraulic fluids (or liquids) are the medium by which power is transferred in a hydraulic machinery or system. Hydraulic systems can be found today in a wide variety of applications with their major components including the reservoir, pump, valve(s) and actuator(s) (motor, cylinder, etc.). Apart from their energy transmission function, they are also used for lubrication, heat transfer and contamination control. Today’s hydraulic fluids come in different varieties, most common being petroleum-based, water-based and synthetics.
Petroleum-based or mineral-based fluids are the most widely used fluids today. These fluids offer a low-cost, high quality and readily available selection. The properties of a mineral-based fluid depend on the additives used, the quality of the original crude oil and the refining process. Additives in a mineral-based fluid offer a range of specific performance characteristic. Common hydraulic fluid additives include rust and oxidation inhibitors (R&O), anticorrosion agents, demulsifiers, antiwear (AW) and extreme pressure (EP) agents, VI improvers and defoamants. Additionally, some of them contain colorful dyes, allowing easy identification of leaks. Water-based fluids are used for fire-resistance due to their high-water content but, apart from their higher cost compared to conventional petroleum-based fluids, they have other disadvantages (e.g. lower wear resistance) which must be considered. They are available as oil-in-water emulsions, water-in-oil (invert) emulsions and water glycol blends and used in applications when fire resistance is needed. Water-based fluids can provide suitable lubrication characteristics but need to be monitored closely to avoid problems. Synthetic fluids are man-made lubricants and many offer excellent lubrication characteristics in high-pressure and high- temperature systems. Some of the advantages of synthetic fluids may include fire-resistance (phosphate esters), lower friction, natural detergency (organic esters and ester-enhanced synthesized hydrocarbon fluids) and thermal stability.
Products in this category are sourced from quality producers, offered in different packaging options and comply with military (MIL-SPEC ) and other industrial specifications/standards to meet application requirements. In addition, hydraulic and coolant fluids and specialty products used in Russian and Ukrainian aircraft are also included. Due to our continuously expanding list of suppliers and the respective range of offered products, certain products may not be currently listed in our Web Platform for Supplies. The list below presents different MIL-SPEC products which can be furnished through our current network of co-operating suppliers and their respective specification of compliance. Please also refer to the individual product presentations or contact us for additional information and assistance.
Hydraulic, Coolant & Other Fluids
MIL-PRF-5606A Hydraulic Fluids, Aircraft, Missile, And Ordnance Petroleum Base
MIL-PRF-5606H Hydraulic Fluids
MIL-L-5606A Aviation Hydraulic Fluids
MIL-H-5606A (obs) Aviation Hydraulic Fluids
MIL-PRF-6083F Hydraulic Fluids
MIL-PRF-46170D Type 1 Synthetic Fire Resistant Hydraulic Fluids
MIL-PRF-83282D/MIL-PRF-83282D, Amd. 1 Aviation Hydraulic Fluids
MIL-PRF-17672D-32 Hydraulic Oils
MIL-PRF-17672D-46 Hydraulic Fluids
MIL-PRF-87257A Hydraulic Fluids
MIL-PRF-87252C Coolant Fluids, Hydrolytically Stable, Dielectric
BMS 3-32 Strut Fluids
BMS 3-32 Type 2 Landing Gear Fluids
Solvents
MIL-PRF-7024F Solvents