ARTICLE Screw Compressor with Belt Drive

These innovative machines are belt-driven to provide air and nitrogen applications at positive pressure, negative pressure, and in a range of nominal sizes. The flexible modular system allows for almost any combination of compressors and accessory components. The belt drive allows for optimal adaptation of the system to do the job at hand, as well as for any changes that may become necessary later. In addition, the belt drive allows for precise configuration – an important feature given that the greatest savings come from saving energy. This means, for example, that a 5% deviation in the volume stream means a 5% increase in energy consumption.

Advantages:

• Energy efficient, reduced life-cycle costs
• Significantly reduced noise levels
• ATEX certified for spark suppression
• Space-saving compact design
• User friendly and low maintenance

Design

A unique feature the screw compressors in the Generation 5 plus series come with, is a choice of specially designed rotor profiles for added flexibility. VML compressors have a 3+4 profile and are ideal for applications up to pressure ratio 3 (final pressure over intake pressure). That means they are also perfect for negative pressure applications up to 70% vacuum (0.3 bar abs.). A special pre-inlet version can achieve up to 85% vacuum (VM compressors have a 4+6 profile.

They are tailor-made for positive pressure ranges (up to pressure ratio 4.5) and for intake volume flows of around 120 m³/h to 2,030 m³/h.

• VML compressor up to max. pe = 2 bar (g)
• VM compressor up to max. pe = 3,5 bar (g)0.15 bar abs.).

The available outlet port choices enable the AERZEN compressor to be adapted for the process at hand. The various outlets in the cylinder, called πi, are a measure of internal compression. This flexibility is decisive. In every Delta Screw Generation 5 plus compressor, the choice of compressor type and πi can be optimized to best meet the desired pressure and volume flow. Over and under compression can be minimized, leading to maximising the compressor’s efficiency.

Volume flow

120 to 2,650 m3/h

Medium

Air, Neutral Gases, Landfill and Biogas, Process Gases, Aggressive Gases

Main Applications

• Conveyance or compression of inert gases
• Pneumatic air or nitrogen transport of powders, bulk solids, ash, etc.
• Aeration of sewage tanks
• Blending of cement
• Vacuum forming for the glass industry
• Keeping waterways and ports ice-free
• Creating oil barriers
• Gas-air mixing installations
• Oxidation air for power plants
• Stationary unloading of tanker trucks
• Vacuum production for the paper industry
• Forced air for spun-bonded olefin production
• Aircraft turbine starters