Oil-Free Screw Compressors Vra Units

The unit is ideally suited for dry compression of all gases, which occur in chemical and petrochemical industries.

The screw compressors are individually designed to fulfil widely differing requirements. The AERZEN process gas screw compressor uses the standard VRa-unit for the compressor block with specified ancillary accessories assembled to form a well-conceived package unit to suit each application.

Design

Within the compression chambers there is no metallic contact among both rotors as well as to the casing. Thanks to synchronising gears the rotors run without contact to each other. Therefore, the conveying chambers remain unlubricated and the conveyed medium will not be contaminated.

The maximum (1350 mm) and the minimum rotor length (155 mm) give an impression of the entire breadth of the offer. For the adjustment to the different process gases, rotors made of steel or special steel and casing of nodular cast iron, steel- or special steel casting can be applied.

The Unit Design Can Be Affected According to the Following Guidelines:

• DIN / EURO standards
• NACE
• AD-regulations
• TEMA - standard
• ASME VIII Div. 1, incl. U-stamp
• API-guidelines
• ATEX

Volume flow

550 to 120,000 m3/h

Medium

Air, Neutral Gases, Process Gases, Aggressive Gas

Main Applications

• Chemical and process technology
• Control air systems
• Industrial refrigeration plants
• Evaporation plants
• Mining industry
• Iron and steel works