Oil-free piston air compressors for blow molding PET, rPET and PLA bottles

Oil-free piston air compressors for blow molding PET, rPET and PLA bottles

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Link to VITO Next: green light to sustainability

PollPosition VITO NEXT - Energy Saving

PollPosition VITO NEXT - Energy Saving



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To view the services offered by the Global Service Division for PET compressors, click here.

Oil-free piston air compressors for blow molding PET, rPET and PLA bottles


VITO NEXT: the “smart” compressor for blow molding PET, rPET and PLA bottles

SIAD Macchine Impianti (SIAD MI) has been active since 1980 in the PET compressor sector. In 2014, the company introduced the "VITO" range, the first compressor specifically designed for the requirements of the PET, rPET and PLA sector. Since its launch, the VITO (acronym for Value, Innovation, Technology and Optimization) established the beginning of a "new era" in the world of air compression for blow molding machines and today SIAD MI can boast an achievement of installing over 6,000 compressors on all continents of the world.

SIAD MI has continued the evolution of the VITO range by offering its customers a premium solution that delivers the best performance available on the market for high and medium pressure oil-free air compression in terms of:  

  • Energy efficiency
  • Reliability and durability
  • Low maintenance costs
  • Adaptability to the most severe environmental conditions

Thanks to the constant collaboration of technicians and engineers with the Research and Development Department and the feedback from our customers, VITO NEXT was born in 2020.

The best Total Cost of Ownership available on the market

In order to meet all customer requirements, the VITO range is flanked by the TEMPO2 line and by the Screw + Booster piston compressor line, the BS Line.


 SIAD MI range of oil-free air compressors for blow molding PET bottles

 Stages  3  3
 Maximum suction volume   6 000 m3/h  3 534 acfm
 Maximum installed power  900 kW  1 225 HP
 Maximum delivery pressure   42 bar (a)  610 psi (a)
 Compressor configuration

Reciprocating compressor with "V" cylinders (VITO range)

Reciprocating compressor with "W" cylinders (TEMPO range)

Screw + booster reciprocating compressor with vertical or “V” cylinders (BS range)



The complete supply of a compression line includes: air treatment skid, compressor skid, control panel, cooling system and outlet filtering unit. It is also possible to order specific components from this list.


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The technical details that make the difference

The features of VITO NEXT:

Greater efficiency

  • the efficiency of the condensation separators has been largely improved by a new design that eliminates traces of carry-over and guarantees conditions with air treatment to ensure dry, oil-free air with an extremely low dew point.
  • the cylinder cooling system has also been improved: the water-flow is optimized and is based on the ambient conditions in which the installation is located.

Extended lifetime

  • use for the cylinders of improved materials, perfectly resistant to corrosion, which prolong the product’s lifetime and reduce wear and tear (instead of the protective film treatment currently universally used).

Greater reliability and improved performance

  • the mechanical and structural resistance to vibrations of the components installed in each compressor has been considerably increased, thanks to a new and stronger design of the base-plate and the redesign of components including : suction filters, transmission unit protection, pipe fastening systems etc.

New optional features to enhance performance

  • Our “Low-noise Package”: the level of noise has been optimized thanks to a new and highly efficient filter-silencer unit for suction.
  • Our “No-Vibration Skid”: the stability of the compressor has been increased thanks to the new design that makes the base more robust and includes a greater number of anti-vibration elements. This results in a reduction of the vibrations in the compressor as well as a reduction of the specific static weight on the supporting surface. This optional feature is recommended in certain demanding conditions, as, for example, in the case of installations on elevated floors.

Energy saving: here are our options

  • VSD (Variable Speed Drive)

With an inverter drive, which regulates the frequency of the electric power supply, the compressor motor operates at variable speeds.

  • 0-50-100%: Step regulation of the flow rate

Thanks to our 0-50-100% device, if the request for compressed airdecreases, the upper effect of the first stage cylinder is excluded, by means of pneumatic valve unloaders, and therefore we obtain a flow rate equal to 50% of the nominal value.

  • Energy Saving Pack

It is essential to know in detail the actual use of the compressors in order to study and define the most efficient working method for the system. For this purpose, SIAD Macchine Impianti (SIAD MI) offers the "Energy Saving Pack" which involves an analysis of the operation of the air compressors at the customers' premises, with a detailed analysis of the energy consumption : this is then followed by a specific proposal for the installation of a control panel, or of a control panel plus a VSD. The main control panel manages up to 8 compressors simultaneously. The panel constantly calculates the total compressed air flow rate and the consumption of the electricity and therefore enables it in real time to adapt the compressors’ performance to the required changes.


Energy saving and flexibility with respect to different volumes of bottles in production

• Increased air flow rate with the same energy consumption

• Easy system management

• Greater reliability– less wear thanks to less "idle" operation

• Less maintenance - reduction of production costs

• Guaranteed optimum use of all the compressors installed.

• VSD investment with quick pay-back time.


  • Compressed air recovery

This system allows the recovery of compressed air from the blow molder, with a consequent reduction in energy consumption for compression. For its customers, SIAD MI handles both the feasibility analysis and the implementation of this solution, which can be easily applied to compressors already installed.

  • Heat recovery

The thermal energy produced by a SIAD MI compressor can be recovered for different purposes at the customer's plant (eg : heating and auxiliary systems). In this situation too, SIAD MI handles both the feasibility analysis and the implementation of this solution for its customers. Depending on the model, the solution allows a recovery of between 30% and 80% of the thermal power of the compressor, plus providing a supply of water at temperatures of up to 90°C.

SIAD Macchine Impianti I has been operating in the food and beverage industry for many years and is fully conversant with all regulatory requirements for preventing contamination from oils and toxic substances. It has thus succeeded in developing compressors with standard features capable of supplying oil-free high and medium pressure air for the blow molding of PET, rPET and PLA bottles and containers, which are also used in the following sectors: Cosmetic, Chemical and Pharmaceutical.

SIAD Macchine Impianti offers a wide range of solutions for oil-free compressed air which satisfy all the needs of its customers with products and services that meet their specific requirements. If you are interested in receiving an offer for PET compressors, please send an email to: