Bell cup/paint gun cleaner SL-2310U

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Cleaner for Paint Deposits on Bell Cups and Spray Guns Used in Painting Processes
BELLSEN "SL-2310"

With no flash point, SL-2310 helps reduce flammability risks when used in ultrasonic cleaning equipment.
It powerfully dissolves hardened paint remaining in fine openings, helping eliminate a source of particle defects in painting processes.

Inquiries About Catalogs, SDSs, and Cleaning Tests
What Is a Bell Cup? Features Solutions Cleaning Performance
Properties Related Articles

What Is a Bell Cup?

Electrostatic painting is widely used in automotive coating processes. In this method, the object being coated, such as a vehicle body, and the paint are given opposite electrical charges so that the atomized paint is attracted to the workpiece. Painting robots are commonly used to perform this process.

Electrostatic painting process using a bell cup Bell cup after cleaning

A bell cup is the bell-shaped component fitted to the paint outlet of a painting robot.

The bell cup rotates at approximately 5,000 rpm, using centrifugal force and electrostatic force to atomize and electrically charge the paint. Bell cups contain many micron-scale openings. After the atomized paint is discharged, electrostatic attraction helps draw it toward the oppositely charged vehicle body.

Bell cups are often cleaned by immersion in thinner. However, once paint dries inside the fine openings of the bell cup, it may no longer dissolve sufficiently in conventional thinner and can become difficult to remove. Ultrasonic cleaning may therefore be used together with immersion cleaning. When a low-flash-point solvent is used in ultrasonic cleaning equipment, careful control of flammability risks is essential.

KAKEN TECH developed the BELLSEN Series as dedicated bell cup cleaners combining strong cleaning performance with no flash point, helping reduce flammability concerns during ultrasonic cleaning.

Product Features

01

High Dissolving Power

Powerfully dissolves hardened paint remaining in fine openings, helping remove a source of particle defects in painting processes.

02

Low VOC (Volatile Organic Compounds)

Significantly reduces VOC (volatile organic compound) emissions compared with conventional thinner-based cleaning.

03

Material Compatibility and Reduced Flammability Concerns

SL-2310 is designed for compatibility with aluminum components used in bell cups. With no flash point, it also helps reduce flammability risks during ultrasonic cleaning.

Solutions for Cleaning and Quality Challenges with Electrostatic Painting Bell Cups and Spray Guns

  • Flammability risks associated with thinner and ultrasonic cleaning
    Using or heating low-flash-point cleaning thinners in ultrasonic cleaning equipment can create significant flammability concerns and complicate workplace safety management.
  • Particle defects and lower first-pass yield caused by insufficient cleaning
    Paint left behind inside spray guns or the fine openings of bell cups can detach during painting and become particles that cause serious coating defects.
  • Poorer working conditions caused by strong thinner odors and high VOC emissions
    Strong solvent odors, VOC emissions, and the safety measures required when handling flammable cleaning solvents can place a substantial burden on painting-line operations.

Cleaning Performance

Bell cup before cleaning
Before Cleaning
(Hardened Paint Deposits)		 Arrow Bell cup being cleaned in an ultrasonic cleaner
Ultrasonic Cleaning		 Arrow Bell cup after cleaning
Paint Deposits Removed

Typical Properties

■ Typical Properties

ApplicationsMasking Jigs―
Bell Cups / Spray Guns〇
Paint Lines―
pHNeutral
Effects on MetalsAl〇
Cu〇
Fe〇
SUS〇
Ni Plating○
Operating TemperatureRoom Temp.~60℃
Packaging17 kg/can
UNR TDG(UN Class/UN No./PG)None

Please refer to the latest SDS and technical documentation for detailed safety, handling, storage, transportation, and regulatory information applicable to your region.


Related Articles & Products

Thumbnail for the page explaining cratering defects in painting processes Technical Solutions
Preventing Painting Defects: Examples of Cratering
Cratering occurs when a contaminant with lower surface tension than the liquid paint contacts the coating. The contaminant spreads across the paint surface, causing the coating film to become thinner in that area. This page introduces numerous examples of cratering defects.
Thumbnail for the page explaining particle defects in painting processes Technical Solutions
Preventing Painting Defects: Examples of Particle Contamination
Particle defects can originate from paint as well as small contaminants such as dust, fibers, and insects. Electrostatic attraction can make these problems more severe. Identifying and controlling the sources of contamination is important for reducing these defects.

Contact Us for Preliminary Ultrasonic Cleaning Tests and Samples

Are you looking to reduce flammability concerns associated with ultrasonic cleaning using conventional thinner, protect precision aluminum bell cups from damage, or eliminate particle defects caused by insufficient bell cup cleaning?
We can conduct preliminary ultrasonic cleaning tests using your paint and cleaning conditions. Please feel free to contact us.


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