Fm26 Iso Review

| Property | | ISO HFA (Oil-in-Water) | ISO HFD (Synthetic Ester) | | :--- | :--- | :--- | :--- | | Water Content | 35-45% | 80-95% | 0% | | Fire Resistance | Excellent (FM Approved) | Good (but low lubricity) | Excellent (but expensive) | | Lubricity | Fair to Good (needs AW additives) | Poor (requires low pressure) | Excellent (near mineral oil) | | Operating Temp | -20°C to +60°C | +5°C to +50°C | -40°C to +150°C | | Cost Index | $$ (Medium) | $ (Low) | $$$$ (High) | | Compatibility | Nitrile, EPR, Polyurethane | Nitrile, most elastomers | Viton, PTFE (attacks nitrile) | | Pump Limits | Up to 3,000 psi (210 bar) | Up to 1,000 psi (70 bar) | Up to 5,000 psi (350 bar) |

The short answer is

Introduction In the high-stakes world of industrial hydraulics, the choice of fluid is rarely just about lubrication. In environments where open flames, extreme heat, or molten metal are present—such as steel mills, die-casting plants, and mining operations—a standard mineral oil is a ticking time bomb. This is where FM26 ISO enters the conversation. fm26 iso

Because FM26 has a viscosity of 26 cSt at 40°C, it is slightly thinner than VG 32 (which is ~32 cSt). However, water-glycol fluids have poorer lubricity than mineral oils. To compensate, engineers rely on the velocity of the fluid to create a hydrodynamic wedge. | Property | | ISO HFA (Oil-in-Water) |