TECHNICAL REFERENCE
While Donaldson has developed many formulations of media, they can be divided into two broad categories: natural fibers, usually cellulose, and synthetic or man- made fibers. Compatibility of Donaldson Filter Media with Hydraulic Fluids
Recommended Filter Media
DT Synteq
Petroleum-Based (Hydrocarbon) Fluids Cellulose Synteq
Straight oils
Yes
Yes
Yes
ATFs
Yes
Yes
Yes
Military hydraulic fluids
Yes
Yes
Yes
#2 Diesel fuel
Yes
Yes
Yes
Gasoline
Yes
Yes
Yes
E85 (85/15 Ethanol/Gasoline)
No
No
Yes
DT Synteq
Piston Pump Damage The severe score marks on the piston slippers leave no question about why good hydraulic filtration is important.
Fire Resistant Fluids
Cellulose Synteq
HFA - Oil-in-water emulsion
No
<150°F Yes
HFB - Water-in-oil emulsion
No
<150°F Yes
HFC - Water glycol
No
<150°F Yes
HFD Synthetics - Polyol esters, Esters, Diesters, & blends
No
Yes
Yes
HFD Synthetics - Phosphate esters
No
No
Yes
HFD Synthetics - Polyalkylene glycols (PAG), Polyalphaolefins (PAO), & blends
No
Yes
Yes
HFD Synthetics - Silicone (siloxane) oil
No
Yes
Yes
DT Synteq
Biodegradable Fluids
Cellulose Synteq
Vegetable-based oils - sunflower, rapeseed oils
No
Yes
Yes
Synthetic oils - PAG / PAO
No
Yes
Yes
Synthetic oils - Esters, Diesters
No
Yes
Yes
Threads • Gas per ISO 228/1 • M per UNI 4534-5545 • Flange connections per SAE J518 3000 PSI or 6000 PSI • UN-UNC-UNF-UNS per ANSI/ASME B1.1 • SAE per SAE J1926-1
• NPT per ANSI/ASME 1.20.1 • NPTF per ANSI/ASME 1.20.3
34 • Hydraulic Filters & Accessories
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