Barrier Fluid - DuraClear Crystal 7

Strong chemistry enables strong performance. DuraClear Crystal 7 is a perfluoropolyether (PFPE) based fully synthetic oil. Comprised of fully bonded oxygen, fluorine and carbon atoms, this extremely stable molecule is equally extremely inert.

• Nontoxic
• Nonreactive
• Nonoxidizing
• Colorless
• Odorless
• Nonflammable
• Does not degrade with use or temperature
• Does not coke or crystallize
• Environmentally friendly
• Food grade

Compatible with all seal face materials

• Carbons
• Silicon Carbides
• Tungsten Carbides

DuraClear Crystal 7 is a Perfluoropolyether (PFPE) based oil which offers several benefits over ISO 7 grade CTFE fluids:

• Better compatibility with Lewis acids
• Better lubrication capability (lower seal face wear)
• More thermally stable
• No corrosive Chlorine in molecular chain
• Flatter viscosity curve vs temperature

NSF61

ISO grade of oil: 7

Viscosity ASTM D445

• 16 cSt at 20°C (68°F)
• 8 cSt at 40°C (104°F)
• 2 cSt at 100°C (212°F)

Pour Point: <-70°C (<-94°F)

Density g/ml

• 1.89 at 0°C (32°F)
• 1.70 at 100°C (212°F)

Recommended process fluid temperature range: -60 to 204C / -76 to 400F

Barrier fluid operating range: -40 to 130C / -40 to 266F

Optimal barrier fluid operating range: 20 to 100C / 68 to 212F