2 General description
2.1 Introduction
General description
The VSD (Variable Speed Drive) machines are two-stage rotary tooth compressors, driven by an
electric motor. The compressors deliver oil-free air. ZT are air-cooled and ZR are water-cooled.
By continuously matching the speed of the drive motor to the air demand, the VSD compressor
optimizes energy consumption and reduces the operating pressure band.
The compressors are enclosed in a sound-insulating bodywork.
The compressors are built up with following major components:
• Inlet silencer with integrated air filter (IS-AF)
• Load/no-load valve (UA)
• Low-pressure compressor element (El)
• Intercooler (Ci)
• High-pressure compressor element (Eh)
• Aftercooler (Ca)
• Electric motor (M1)
• Drive coupling
• Gear casing
•
Elektronikon
TM
regulator (1)
• Safety valves (SVh)
All compressors are so-called WorkPlace Air System compressors, which means they operate at
a very low noise level.
General view
Instruction book
12 API797429
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