Mobil industrial , United Kingdom

Fire-Resistant Hydraulic Fluid

Product Description

Mobil Pyrotec HFD-U series are fire resistant hydraulic fluids engineered to meet the requirements of DIN EN ISO 12922. Thanks to its fully synthetic ester base oil and environmentally friendly additives, Mobil Pyrotec HFD-U series are readily biodegradable in accordance with DIN

ISO 15380. These synthetic-based products are designed to provide high quality hydraulic fluids with high versatility to lubricate a broad range of industrial and off-highway equipment.


Features and Benefits

Mobil Pyrotec HFD-U series shows excellent thermal and oxidation stability that can help reduce maintenance downtime and costs by contributing to system cleanliness and deposit reduction, enabling long oil and filter life. Its outstanding anti-corrosion and anti-wear properties protect system components against wear and scuffing and help provide long equipment life.  It offers a wide range of operation due to its wide low temperature characteristics.


Mobil Pyrotec HFD-U series meet requirements for EU Ecolabel and Blue Angel.



Recommended by ExxonMobil for use in areas with increased risk of fire, such as in steel mills and metallurgical plants as well as in mining where especially underground working is at a high risk of fire. Furthermore, the use is recommended in areas prone to increased environmental risk.


• Hydraulic and oil circulation systems operating in conditions subject to fire hazards or environmentally sensitive areas

• Continuous caster

• Blast furnace

• Reheating furnace

• Underground and open pit mining

• Tunneling

• Forestry equipment

• Construction equipment


Properties and Specifications





ISO 46

ISO 68

Density @ 15 C, kg/l, ASTM D4052



Flash Point, Cleveland Open Cup, °C, ASTM D92



Kinematic Viscosity @ 100 C, mm2/s, ASTM D445



Kinematic Viscosity @ 40 C, mm2/s, ASTM D445
48 71 

Pour Point, °C, ASTM D97



Viscosity Index, ASTM D2270




Health and Safety

Health and Safety recommendations for this product can be found on the Material Safety Data Sheet (MSDS) @

All trademarks used herein are trademarks or registered trademarks of Exxon Mobil Corporation or one of its subsidiaries unless indicated otherwise.


Esso Petroleum Company limited
ExxonMobil House, Ermyn Way, Leatherhead, Surrey KT22 8UX

You can always contact our Technical Help Desk engineers on Mobil lubricants and services related questions:

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Typical Properties are typical of those obtained with normal production tolerance and do not constitute a specification.  Variations that do not affect product performance are to be expected during normal manufacture and at different blending locations.  The information contained herein is subject to change without notice. All products may not be available locally. For more information, contact your local ExxonMobil contact or visit
ExxonMobil is comprised of numerous affiliates and subsidiaries, many with names that include Esso, Mobil, or ExxonMobil. Nothing in this document is intended to override or supersede the corporate separateness of local entities. Responsibility for local action and accountability remains with the local ExxonMobil-affiliate entities.