Permak Solvent Degreasing Machines

Benefits of the hermetically sealed cleaning systems and the different steps of the cleaning cycle

Originated from our deep experience in the industrial activity and also thanks to the gratifying successes that has followed our specialization in the cleaning of precision, automotive, aerospace and engineering components, our hermetically sealed degreasing machines are capable to perform a cleaning and drying treatment cycle under high vacuum level.

Our cleaning systems for metal components are designed to use different types of solvents in absolute safety.

Phases of the cleaning cycle

DEGASSING

The prior degassing of the solvent, performed initially for safety reasons, continues during the full immersion phase, ensures absolute absence of air bubbles and so the penetration and homogeneity of the dipping bath.

Through a multi-stage washing process, our washing systems can be optimally adapted to the various component cleaning needs. A typical cycle sequence is as follows:

• Spray pre-wash
• Main wash with full immersion or half-immersion (with or without ultrasonics)
• Rinsing (either spray or with immersion)
• Solvent Vapor phase
• Drying (possible deodorization with activated carbon, in the case of perchlorethylene)

The washing phases can be flexibly varied and parameterized and saved in the Siemens PLC programs.

DRYING WITH MODIFIED ALCOHOLS OR HYDROCARBONS (AIII)

At the end of the cycle, thanks to the drying stage with vacuum values ​​less than 1-3 mBar, parts come out completely deodorized and without any solvent residue that can contaminate the work environment.

The solid particles of dirt, such as dust, metal chips and inorganic salts, are effectively removed by the mechanical action of the cleaning cycle combined with the selected movement of the basket.

Any layers of burned oil and additional contaminated solids deposited on the component (eg: Oxides and lapping and polishing pastes) require instead the action of ultrasonics that can be installed on request in the majority of our closed-circuit systems.

DISTILLATION

Distillation process for solvent machinesThe distillation process, vital function of solvent machines, consists of two distinct phases which allow an almost total separation between solvent and oils and it is distinguished by a negligible presence of solvent in the distillation residues.

In particular, the continuous distillation of the solvent (main phase of distillation) is alternated to the phase of Boil down of the still residues. This boil-down phase is made typically at the end of the day in the main distiller (or, if the option is present, through the secondary distiller, in this case also in a continuous process).

Boil down of oil sludge has the purpose of reducing the solvent content to values ​​<1-2% of the sludge, which are then automatically ejected in a timed phase (under temperature control).

The operator NEVER comes in contact with the solvent since all the management operations of sludge of distillation and the cleaning of filters take place automatically.

Vacuum cleaning systems: the consumptions

Solvent cleaning systems have a negligible consumption of only a few liters per year; however, it is necessary to comply with the following conditions of use:

• Choose the appropriate treatment program; that is, use only the programs pre-loaded into the plant by our technicians during testing and production start-up
• Perform proper management of solvent distillation; carrying out the distillation steps according to the load of contaminant contributed, without manually forcing the stored distillation procedure
• Perform regular maintenance and cleaning; it is necessary to comply with the operational and time directions given in the operation and maintenance manual

Solvent cleaning systems : the design

Our technical dept. will know how to present each customer the most suitable customized proposal suitable for his or her needs. We will appropriately evaluate specific cleaning problems and present the most suitable solvent system configuration to ensure the best cleaning result.