Galden® SV: High-Performance Cleaning Solvents for Vacuum, Cleanroom and High-Tech Applications

High-tech manufacturing requires more than conventional degreasing. Semiconductor tools, vacuum pumps, precision electronics and cleanroom assemblies may contain sensitive materials, energized components or residues specialty PFPE lubricants. In these environments, an unsuitable solvent can introduce flammability risks, leave contamination behind or interfere with subsequent lubrication.

Galden® SV is a family of fluorinated cleaning solvents developed by the former Solvay Specialty Polymers business and now supplied under Syensqo, following Syensqo’s separation Solvay in 2023. These fluids are designed for specialized cleaning operations in which dielectric behavior, non-flammability and compatibility with PFPE oils and greases are important.

Unlike general-purpose industrial solvents, Galden SV is not intended to be a universal degreaser. Its strongest technical value is in cleaning, diluting and applying fluorinated lubricants within demanding vacuum, electronics and cleanroom processes.

What Is Galden SV?

Galden SV fluids are low-molecular-weight perfluoropolyethers, or PFPEs. They are CFC-free, chemically inert, colorless and odorless fluids with boiling points across the range of approximately 55°C to 135°C.

Syensqo identifies Galden SV as a solvent family suitable for cleaning hot components, heated-solvent processes and pressure-spray applications. The fluids can also act as carriers for fluorinated lubricants, including PFPE oils and greases. Syensqo’s Galden PFPE application guidance describes these uses directly.

Galden SV should not be confused with:

• Galden HT heat-transfer fluids.
• Galden LS/HS vapor-phase soldering fluids.
• Galden D electronic testing and leak-detection fluids.
• PFPE oils or greases that remain in the component as lubricants.

Galden SV is primarily a cleaning solvent and lubricant carrier rather than a load-bearing lubricant.

Galden SV Grades and Boiling-Point Selection

The grade number generally indicates the nominal boiling point. A lower-boiling fluid evaporates faster, while a higher-boiling grade provides a longer working time and lower evaporation rate under comparable conditions.

Grade	Nominal boiling point	General selection consideration
Galden SV55	Approximately 55°C	Fast evaporation and short drying cycles
Galden SV70	Approximately 70°C	Balance between drying speed and working time
Galden SV90	Approximately 90°C	Intermediate evaporation profile
Galden SV110	Approximately 110°C	Longer contact time and reduced rapid evaporation
Galden SV135	Approximately 135°C	Extended working time and lower volatility

Grade availability can vary by market and product revision. Current public Syensqo information also includes SV80 among the intermediate grades. SV90 should therefore be confirmed against the latest regional technical data sheet before publication in a purchasing specification.

Boiling point alone is not sufficient for selection. Engineers should also evaluate process temperature, ventilation, fluid recovery, required drying time, residue characteristics, seal materials and the geometry of the component being cleaned. Syensqo’s current product information confirms that the SV family covers boiling points 55°C to 135°C. Galden SV55 and Galden SV135 define the lower and upper ends of this range.

Three Core Performance Characteristics

1. Dielectric properties

Galden SV fluids have dielectric characteristics that support cleaning around sensitive electronic and electromechanical components. Their low electrical conductivity can reduce the risk associated with conductive cleaning residues.

However, “dielectric” does not mean that cleaning energized equipment is automatically safe. Equipment isolation, discharge procedures and the manufacturer’s electrical safety instructions must still be followed. Moisture, particles and dissolved contamination can also alter the condition of a working solvent.

2. Non-flammability

Galden SV fluids have no flash, fire or auto-ignition points under the referenced test conditions. This is valuable when solvent cleaning involves hot components, heated baths or pressure spraying—situations in which flammable solvents require extensive ignition control.

Non-flammability does not eliminate the need for ventilation, exposure control or correct storage. The applicable safety data sheet must remain the primary reference for handling, spill response and waste management. Syensqo describes Galden SV grades as suitable for hot-component, preheated and pressure-spray cleaning operations because of this safety profile.

3. Compatibility with PFPE oils and greases

One of the most important advantages of Galden SV is its compatibility and full miscibility with PFPE oils and greases. This allows it to dissolve residual PFPE lubricant, reduce lubricant viscosity for controlled application and act as a carrier that evaporates after placement.

This capability is especially valuable where hydrocarbon or alcohol-based solvents cannot effectively remove fluorinated lubricant films. Nevertheless, material compatibility should still be validated with the actual seals, plastics, coatings, adhesives and elastomers used in the equipment.

Typical Galden SV Applications in High-Tech Industries

Vacuum-pump maintenance: Galden SV can help remove aged PFPE oil or grease pump components before inspection, rebuild or relubrication. Effective removal of old residue reduces the risk of mixing contaminated lubricant with the new charge.

Semiconductor process equipment: Chamber hardware, vacuum components and wafer-handling assemblies may require controlled cleaning with minimal residue. A PFPE solvent is particularly relevant where the equipment already uses PFPE-based specialty lubricants.

Cleanroom mechanical assemblies: Bearings, gears, seals and precision mechanisms can be cleaned during maintenance before a clean lubricant is reapplied. Tools, containers and handling practices must remain compatible with the facility’s contamination-control procedure.

Precision electronics: Dielectric, non-flammable cleaning can be advantageous for electronic components and assemblies that cannot tolerate conductive or combustible cleaning media. Compatibility with coatings and plastics must be confirmed before full-scale use.

Removal of PFPE lubricant residues: Galden SV can dissolve and carry away PFPE oils and greases components, dispensing equipment and maintenance tools. This is a more targeted application than general removal of conventional mineral-oil contamination.

Carrier for thin-film lubrication: A measured quantity of PFPE lubricant can be diluted in a compatible Galden SV grade for dipping, spraying or precision dispensing. After the carrier evaporates, a controlled lubricant film remains on the surface.

Cleaning hot or complex components: Low surface tension and selectable volatility can support penetration narrow clearances and complex geometries. The selected boiling point should provide enough contact time without creating unnecessary drying delays.

Galden SV Compared with Conventional Cleaning Solvents

Hydrocarbon solvents may clean mineral oils effectively but can introduce flammability concerns. Alcohols evaporate quickly and are widely available, yet they are generally unsuitable as carriers for PFPE lubricants. Chlorinated solvents can offer strong solvency but may create additional environmental, regulatory or material-compatibility considerations.

Galden SV is most appropriate when PFPE compatibility, dielectric performance and non-flammability take priority. It should not automatically replace every cleaning solvent; contaminant chemistry and process requirements must guide the decision.

Selection, Use and Maintenance Recommendations

Before implementation, engineers should:

• Identify the contaminant and confirm that it is soluble in the selected fluid.
• Choose the boiling point according to contact time, drying speed and fluid recovery.
• Conduct compatibility testing on actual seals, coatings, plastics and adhesives.
• Prevent cross-contamination with hydrocarbon oils, water and particulate matter.
• Use dedicated, clean dispensing and storage equipment.
• Monitor working fluid for discoloration, particles and declining cleaning performance.
• Follow the latest technical data sheet, safety data sheet and local disposal regulations.

In closed cleaning systems, filtration, condensation and fluid recovery can help maintain cleanliness and control consumption. Replacement should be based on contamination level and process performance rather than time alone.

Frequently Asked Questions

Is Galden SV a lubricant?
No. It is a PFPE-based solvent and carrier fluid. It may be used to clean PFPE lubricant residues or apply a diluted PFPE lubricant, but it does not replace the final oil or grease.

Does Galden SV leave a residue?
A clean, uncontaminated fluid is intended to evaporate without depositing conventional solvent residue. Any remaining film may indicate dissolved lubricant, particles, non-volatile contamination or incomplete drying.

Can Galden SV remove mineral oil and conventional grease?
Its strongest affinity is for fluorinated fluids and PFPE lubricants. Cleaning performance on hydrocarbon contamination must be tested; a staged process or complementary solvent may be necessary.

How should the correct grade be selected?
Lower-boiling grades generally dry faster. Higher-boiling grades offer longer working time and reduced rapid evaporation. Component temperature, cleaning method, geometry and recovery equipment must also be considered.

Can it be used on all plastics and elastomers?
Syensqo reports broad compatibility with metals and many commercial polymers, but formulated seals, coatings and adhesives can behave differently. Application-specific testing remains essential.

Can Galden SV be used on energized electronics?
Its dielectric properties do not replace electrical isolation procedures. Equipment should be de-energized and handled according to the manufacturer’s safety requirements.

Summary and Conclusion

Galden SV is a specialized PFPE cleaning-solvent family for vacuum, cleanroom, semiconductor and precision-electronics applications. Its principal advantages are dielectric behavior, non-flammability and full miscibility with PFPE oils and greases. Selecting the appropriate boiling grade helps balance cleaning contact time, evaporation rate and process productivity.

Correct solvent selection and disciplined contamination control support cleaner lubricant changeovers, more consistent thin-film application and improved equipment reliability. Contact Hicotech Vietnam Co., Ltd., a supplier of genuine high-performance lubricants and specialty fluids, for assistance with Galden SV grade selection, PFPE compatibility and application procedures.

Contact Information

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Email: sales@hicotech.com.vn

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