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Instruction book
1 LEADING PARTICULARS
1.1 General description
ZR55-ZR75-ZR90 and ZT55-ZT75-ZT90 are two-stage screw compressors, driven by an electric motor.
The compressors deliver oil-free, pulsation-free air.
ZR compressors are water-cooled, whereas ZT compressors are air-cooled.
ZR/ZT Full-Feature compressors are additionally provided with an air dryer which removes moisture from
compressed air.
The compressors are enclosed in a sound-insulated bodywork and include mainly:
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Air filter (AF)
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Load/no-load valve (TV)
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Low-pressure compressor element (El)
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Intercooler (Ci)
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High-pressure compressor element (Eh)
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Aftercooler (Ca)
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Electric motor (M1)
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Drive coupling
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Gear casing
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Elektronikon® regulator (3-Fig. 1.1)
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Safety valves (SVh, SVl)
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