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air treatment

Compressed air contains solid, liquid or gaseous contaminants that, if not properly treated, can damage both machineries and end products. Contamination can be due to environmental factors, to the compressor or to air tubes.

The treatment of compressor outgoing air starts with filters, that shall be placed before the compressor and vary depending on air intake particles, air contamination level, weather conditions, compressor model and use (if continuous or discontinuous), permitted pressure drop and the specific applications of compressed air.

An aftercooler must be installed after the compressor in order to reduce the content of water and oil vapors by cooling the air, condensing and separating water vapor. The aftercooler is combined with condensate separator and drain.

Finally an air dryer is required because, despite the condensate separator, compressor outgoing air is saturated with water vapor and contains condensate, which increases during cooling due to air expansion. Condensate is extremely harmful for machines, processes as well as end products and must therefore be eliminated as much as possible from compressed air.

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Filters, condensate separators & drains

Aluminum filters with threaded connections from 1/4’’ to 3’’ for  capacities ranging from 18 to 1920 m3/h with different filtration levels aimed at removing compressed air contaminants (bacteria, dusts and oil) in accordance with ISO 8573-1:2001 standards.

Housing – General Features:


  • Filter housing conceived to reduce pressure drops
  • Internal surfaces entirely chromed
  • External painting with epoxy powders to guarantee
    long duration
  • Coupling kit to combine two or more filters in line


Filter elements – General Features:


  • Push-in coupling which facilitates the replacement of the filtrating element and increases airflow thanks to the elimination of the tie-rod, (except from 1.320, 1.440 and 1.650 m3/h capacities, that have the tie-rod)
  • Compatible with any synthetic oil
  • Heads made of synthetic material which resists up to 120 °C and are corrosion-free, unlike aluminum ones
  • Drainage sock made of polyester which resists up to 120 °C and is stronger than cross linked foam ones
  • 12 months guarantee if our suggestions are respected




FCI Clogging Indicator
Indicates cartridges are obstructed and must be replaced quickly.

PDM and PDM-E Differential Pressure Gauges
Monitor cartridges effective loss of capacity; PDM-E model is equipped with a zero potential switch contact for remote transmission of obstruction alarm.

Condensate Automatic Drains
Automatic drain devices that cyclically eliminate condensate. FD14 and FD28 float models are inside the filter housing, model SCE1 has a timed solenoid valve while ZR model is a capacitive electronic drain that drains condensate without consuming compressed air.

Wall Mounting Brackets
Brackets that facilitate installation thanks to a safe
and reliable fixing system.

Filters Coupling Kit
Coupling system that reduces both filters installation
time and overall dimensions.




Aftercoolers can be installed between one compression stage and the other (intermediary) or after the last compression stage (final) and are divided in two categories: forced air and water.

Hot air arriving to the aftercooler has a high humidity level and exchanges heat with the cooling fluid in order to cool down. An efficient and properly dimensioned final aftercooler can condensate 60% of intake air vapor.


RRW Water Aftercoolers

Final water aftercoolers are made of two elements: a highly efficient air/water shell in tube with minor capacity loss which cools the air, and a cyclone condensate separator which separates and eliminates condensed water.

Suitable to several different functions, RACPID water aftercoolers can be vertically assembled upon request.


RRA Forced Air Refrigerators

Thanks to the powerful electric fans and to the generously dimensioned finned-tube battery it is possible to cool compressed air from 120°C down to an output temperature superior to ambient one by 9°C only. Capacity losses are very low and condensate is discharged by means of the condensate separator fit outside the battery.


Refrigerant Dryers

Cycling refrigerant dryers have been developed to efficiently remove compressed air condensation with compact overall dimensions.


Refrigerant dryers designed to maximize output and reliability. All RD dryers have a high efficiency heat exchanger with condensate separator and a timed electronic adjustable condensate drain suitable to any working condition. “Zero loss” drain also available upon request.

An adjustable electronic controller changes fan speed in order to guarantee a constant dew point in any operating situation. RD dryers are additionally equipped with a wide range of parameters and alarms (high temperature, low temperature, temperature probe failure, etc.).

RD dryers with 600 m3/h airflow or more are perfect to remove compressed air humidity in high capacity industrial plants. Designed to facilitate inspection and maintenance, they are equipped with an electronic controller for the bypass of hot gas and  of the necessary devices that guarantee perfect operation also in the most critical working conditions.


Energy saving refrigerant dryers that, thanks to the innovative three-circuit heat exchanger (refrigerant, glycol and compressed air), enables energy saving up to 90%, visible on the display.

RD-ES dryers are indicated for applications requiring intermittent use or partial load of compressed air. New electronic board with glycol control probe guarantees high efficiency avoiding freezing phenomenon.

Control of variable speed fan to achieve the best performances in any working condition.


Refrigerant dryers with an innovative aluminum high efficiency heat exchanger integrating a condensate separator. The highly performing heat exchanger guarantees low pressure drops.

A microprocessor changes fan speed in order to guarantee a constant dew point in any operating situation. RD dryers are additionally equipped with a wide range of parameters and alarms (high temperature, low temperature, temperature probe failure, etc.) controllable via standard digital display. Electronic condensate drain is standard.


Compact refrigerant dryers designed for high input temperatures (up to 82 °C) including a final aftercooler and a ceramic filter/separator. Compact design taking up less space and reducing installation time. Condensate drain is standard.


Adsorption Dryers

Adsorption dryers use the physical – chemical properties of the desiccant materials to adsorb the humidity present in the compressed air. Essential for industrial applications that  require high levels of dryness.


RDA 40
Dryers providing high quality compressed air with -40°C dew point, fundamental for chemical plants, pharmaceutical industry, laboratories, etc.

Compressed air humidity is initially held by the absorbing substance contained inside the tanks and then eliminated during regeneration; while dried and filtered compressed air goes to the distribution network. regeneration takes place making little dried air counter-current go to regeneration tank.

Dryer duration and efficacy depend on intake contaminants removal. For this reason it is highly recommended to install a coalescing pre-filter upstream and a post-filter downstream to remove dust.


RDA 70
Special adsorption dryers guaranteeing a -70°C dew point.

Dryer duration and efficacy depend on intake contaminants removal. For this reason it is highly recommended to install a coalescing pre-filter upstream and a post-filter downstream to remove dust.


Professional adsorption dryer with reduced vertical dimensions, featuring several options: Energy Management System (EMS), integrated bypass, enhanced silencers, low temperature kit, insulated tanks, marine coating, filter kit or double filters with bypass, pneumatic control, pressure alarms, remote control and alarms.


Dryer that does not use dried compressed air to remove humidity from off-line tank, but a highly efficient turbo blower directing ambient air through a resistance and next towards the off-line tank in which heated air flow regenerates the desiccant. Hot regeneration dryers entail a higher initial capital investment, but saving compressed air for regeneration guarantees lower operating costs with respect to the other adsorption drying technologies.



BP05 consists of a practical 4-way distributor block, threaded connections and a hand-operated piston.

State-of-the-art system aimed at bringing down to zero:

• air consumption thanks to the capacitive control
• maintenance time thanks to the spare parts kit
• installation space underneath tanks
• reliability issues thanks to servo solenoid valve


SG-12M -34M
float drains
Simple and functional drain aimed at discharging condensates from tanks, filters, dryers and condensate separators.

Equipped with manual control drain and removable nipple with compensation tube.


Water Oil separators - WO SET
Simple 2 stages filtration system absorbing residual contaminants. An electronic indicator notifies the user when filter element must be replaced, thus avoiding periodical empirical testing waste water. Ideal to be connected to any type of drain: manual, electronic, timed, of level or capacitive. Oil is held inside the separator, thus only purified water is released. It is not necessary to dispose of separated oil, but of filter elements only. Substitution of exhausted


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