Fire-Resistant Hydraulic Fluids

Fire-resistant fluids are applied wherever there is a risk of combustion and said combustion puts life and equipment at risk. For example, underground mining or tunneling, heat treatment facilities or steel mills.

There are various types of fire-resistant fluid:

1. HFC: water-based (water-glycol)

2. HFDU: synthetic ester or PAG

3. HFAE: oil in water emulsions

4. HFAS: synthetic aqueous fluids

5. HFB: water in oil emulsions

6. HFDR: phosphate esters

7. HFDS: chlorinated hydrocarbons

8. HFDT: HFDR/HFDS mixtures

HFC and HFDU are the most commonly used products due to their ease of use, excellent fire-resistance, resistance to water and biodegradability. On the other hand, phosphate ester (HFDR) fluids are extremely sensitive to acidity and moisture, require special seal materials and are not suitable for human contact.

Below are the key standards relating to FRFs:

· ISO 6743-4:2015: lays out the categories of fire-resistant fluids

· ISO 12922:2020: specifies minimum requirements for unused FRFs

In addition, there is the FM approval (Factory Mutual), which is an insurance company specializing in industrial risk management. This approval confirms that such fluids are less flammable than their mineral counterparts.

The MotulTech range includes the following FRFs:

· Rubric HFC 46

· Rubric HFDU 46 and HFDU 68

For further information, please contact me: or +64274320611

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