Opteon™ SF79
Specialty Fluid

Replacement of N-Propyl Bromide in Vapor Degreaser

Technical Information
Introduction

5. Flush the liquid lines with a small amount of Opteon™ SF79.

Opteon™ SF79* specialty fluid is suitable to replace

6. Charge tank with recommended quantity of Opteon™ SF79.

n-propyl bromide in applications demanding maximum
cleaning power, including defluxing; oil, grease, and wax
removal; and precision cleaning applications.
Opteon™ SF79 offers an excellent balance between cleaning

7. Turn on heaters and pump. Adjust heater, condensing coils,and alarm set points to the recommended temperatures.

RETROFIT IS COMPLETE!

performance, environmental impact, and safety in use:

General Retrofit Information• Excellent solvency power (KB value = 103)

System Modifications• Superior cleaning performance

In the vast majority of cases, Opteon™ SF79 will function• Fast drying, increasing productivity

as a drop-in for n-propyl bromide, and no modifications to• Compatible with most metals, plastics, and elastomers• Nonflammable• Low toxicity• Zero ozone depletion potential (ODP)• Low global warming potential (GWP)• Suitable for use with ultrasonics• Existing equipment can be used with no or minor
modification

Seven Easy Steps to Retrofit
The following provides a summary of the basic retrofit
steps for Opteon™ SF79; detailed discussion of each step

existing equipment are required. Special cases whereminor equipment modifications may be required arediscussed below.
Material Compatibility
Opteon™ SF79 is characterized by good compatibility witha wide selection of metals, including stainless steel, copper,
brass, and aluminum. Opteon™ SF79 is also compatible
with a wide selection of plastics and elastomers, including
Teflon™ PTFE, FEP, PFA, polyethylene, polypropylene, nylon,PVDF, PPS, ECTFE, and DuPont™ Kalrez®
perfluoroelastomer. Examples of incompatible plastics
include acrylics, ABS, polycarbonate, and polystyrene. Mostelastomers including Viton™, natural rubber, EPDM, silicone,

is provided in this bulletin.

and CSPE show reversible swelling when exposed to

1. Drain n-propyl bromide from the vapor degreaser system.

and O-ring seals are recommended for diaphragm pumps.

2. Replace filters.
3. Replace desiccant bags.
4. Wipe down tank and ensure removal of any residues.
*Formerly Opteon™ Sion

Opteon™ SF79. Teflon™ or Teflon™ encapsulated gaskets
Individual plastic and elastomeric formulations can varywith the manufacturer; therefore, the best assurance ofmaterial compatibility can be attained via testing underconditions expected during normal operation. Contact yourlocal technical representative for specific material
compatibility concerns.

Opteon™ SF79

Specialty Fluid

Flammability

6. Charge tank with recommended quantity of Opteon™

Opteon™ SF79 exhibits no closed cup or open cup flashpoint and is classified as a nonflammable liquid. Theproducts are volatile; if allowed to evaporate and mix withair, flammable mixtures can be produced.

SF79. Charge the vapor degreaser tank to the liquid
level recommended by the manufacturer.
7. Turn on heaters and pump. Adjust heater, condensing
coils, and alarm set points to the recommended
temperatures. Turn on the heaters and pumps in

Detailed Retrofit Procedure
1. Drain n-propyl bromide from the vapor degreaser
tank. The existing charge of n-propyl bromide should becompletely removed from the system and collected in asuitable vessel for recycle or disposal in accordance withlocal requirements. Ensure that n-propyl bromide has
been drained from all tanks, liquid lines, water
separators, filter holders, and any other systemcomponents that are in contact with n-propyl bromide.
2. Replace filters. Change the filter during the retrofit.
Standard filters employing polypropylene or PTFE media
are acceptableaccordance with the equipment manufacturer’srecommended procedure. Set the condensing coiltemperatures in accordance with the equipment
manufacturer’s recommendations. Adjust the boil sump andalarm temperatures in accordance with the equipment
manufacturer’s recommendations; Chemours recommended
settings are summarized below and in Table 1.
Cleaning optimization may require slight adjustments tothe recommended initial settings, depending upon themodel of vapor degreaser employed.
• Boil Sump T. Set to 5 °C (9 °F) above the boiling point of

3. Replace desiccant bags. Desiccant drying is not as
crucial with modern cleaning solvents. When you
upgrade to Opteon™ SF79, consult with your Chemours
representative as to the necessity of its use for yourapplication. Type 3A molecular sieves are recommended
for use in the desiccant bags; suitable desiccant bag
materials include cotton. DuPont™ Tyvek bags are not®

recommended.
4. Wipe down tank, and ensure removal of any residues.
The vapor degreaser tank should be thoroughly cleaned
to ensure the removal of any residual n-propyl bromide
and any residues present in the tank.
5. Flush the liquid lines with a small amount of Opteon™
SF79. Charge the vapor degreaser tank with a small
amount of Opteon™ SF79, and flush the liquid lines; do notallow the pump to run dry during the line flushing

the solvent chosen.
• High Solvent T Alarm. Set to 10 °C (18 °F) above theboiling point of the solvent chosen.
• High Vapor T/Coolant Failure Alarm. Set to 5 °C (9 °F)
below the boiling point of the solvent chosen.
• Ultrasonic Tank High T Alarm. Set to not more than 90%of boiling point of the solvent chosen.
Table 1. Recommended Vapor Degreaser Settings forOpteon™ SF79
Setting

Opteon™ SF79

Solvent Boiling Point (°C [°F])

47 (117)

Boil Sump T (°C [°F])

52 (126)

High Solvent T Alarm (°C [°F])

57 (135)

Coolant Failure Alarm (°C [°F])

42 (108)

Ultrasonic Tank High T Alarm (°C [°F])

43 (109)

procedure.

For additional information on Opteon™ SF79 or other specialty fluids products by Chemours, please visit vertrel.com or call 800-969-4758.
The information set forth herein is furnished free of charge and based on technical data that Chemours believes to be reliable. It is intended for use by persons having technical skill, attheir own risk. Because conditions of use are outside our control, Chemours makes no warranties, expressed or implied, and assumes no liability in connection with any use of thisinformation. Nothing herein is to be taken as a license to operate under, or a recommendation to infringe, any patents or patent applications.
© 2017 The Chemours Company FC, LLC. Opteon™ and any associated logos are trademarks or copyrights of The Chemours Company FC, LLC. Chemours™ and the Chemours Logo aretrademarks of The Chemours Company.
Replaces: K-26114-1
C-10838 (5/17)