PRE-TREATMENT , SURFACE PREPARATION , DEGREASING & CLEANING
Degreasing , parts washing & component cleaning
D & S Ultra-Clean supply and commission cleaning and degreasing equipment to a wide range of industries , both in the UK and overseas .
Based in the UK they are the distributors for their cleaning equipment manufacturing partners Union S . p . a , MEG S . r . l and Everest Elektromekanik .
They specify and supply both standard and bespoke solvent and aqueous component cleaning ( degreasing ) systems . They also offer their Biozone range of bio-remedial parts washers and the new Biozone SC Surface Cleaner .
Working with their customers , they offer personalised , unbiased advice and deliver solutions for component cleaning and degreasing applications . D & S Ultra-Clean help to optimise processes and maximise component reliability and lifespan .
D & S Ultra-Clean ' s UK based service team provide comprehensive after-sales service including :
commissioning
operator and maintenance training technical support including remote assistance
The service team offer both preventative maintenance and breakdown diagnosis / visits which maximises the safe and efficient performance of equipment for its lifetime .
They also supply spare parts for the equipment that they supply and are able to still support historic ICI & CJ systems solvent degreasing plants .
Solvent Equipment
Vapour degreasing is a generic term used for a cleaning process that uses a hot ( traditionally chlorinated or fluorinated solvent ) as the cleaning medium . However , more accurately , it is the simplest and most commonly used solvent cleaning or degreasing process .
When solvent such as Perchloroethylene is heated to its boiling point , it produces a vapour . When the hot vapour encounters an item at a lower temperature , such as a metallic component to be cleaned , it condenses and washes over the surface , in this process it dissolves any contamination oils / greases that it comes into contact with .
When the vapour condenses the latent heat released will gradually heat up the component until it reaches the same temperature as the vapour , this is the point at which , condensing , and thus vapour cleaning , stops . When the component is removed from the hot solvent vapour , the heat retained by the item evaporates the thin film of liquid solvent , leaving the part clean and dry .
Vapour cleaning is more commonly used on modern equipment as a process stage usually a rinse after the main wash . As vapour degreasing is not so effective on complex items with blind holes , cavities etc ., the main wash stages of current solvent degreasing processes immerse the components into liquid solvent , either at the boiling point or irradiated with ultrasonic energy , the mechanical action of the ultrasonic agitation gives a more effective cleaning process , before the pure vapour stage ensures a clean and dry uncontaminated result .
Solvent cleaning equipment can then split into three main types , CLOSED , ENCLOSED & OPEN .
The MDM and MUM series , manufactured by UNION S . p . a , are ranges of hermetically sealed , closed solvent cleaning machines designed for use with chlorinated solvents ( such as perchloroethylene ), aliphatic hydrocarbons and modified alcohols .
38 MARCH 2021 read online : www . surfaceworld . com