U N I T E H a.d.   Smederevo, Serbia and Montenegro

 

Home

Contact

 

Home

 

piston compressor

low pressure

 

valves

engineering plants

 

service

STATIONARY SCREW COMPRESSORS
AIR COMPRESSOR

NZ-series- pack screw compressors

 
FULY AUTOMATIC SCREW-TYPE COMPRESSORS WITH OIL INJECTION AND NOISE DAMPING

NZ-PACK IS DELIVERED COMPLETE AND IS EASILY INSTALLED WITH THE ELP OF A FORKLIFT TRUCK AND CONNECTED TO A PRESURIZED AIR DUCT.

NO SPECIAL FOUNDATIONS ARE NEEDED THE 75 dB (A) NOISE LEVEL ENSURED BY THE PROTECTIVE HOUSING ALLOWS THE COMPRESSOR TO BE INTSTALLED IN THE WORKING AREA.

THE COMPRESSOR STATION CAPACITY RANGES BETWEEN 155 l/s TO 377 l/s.

THE ORERATING PRESSURE IS 8 TO 10 BAR. SINGLE-STAGE  MACHINES CAN BE DELIVERED AS CUSTOM MADE TWO-STAGE COMPRESSOR STATIONS OF UP TO 20 BAR.

THE COMPRESSOR STATION CAN HAVE AIR OR WATER COOLING.

Maximum efficiency of compression with maximum wear of the moving parts is achieved by a closed construction patented compressor element. The “heart” of the compressing unit is a couple of assymetrical precision screws that allow maximum compression. A small number of movable parts ensure minimum wear, and low maintenance costs.

The basic elements of the station are the compressor unit with oil injection and electrical motor coupled to it by a special flange. It warrants a permanent centering in transport, installation or transfer of NZ PACK compressors. The flexible coupling of the power unit to the base frame prevents damage in case of erroneous handling or installation on uneven floor.

Compressor cooling can be achieved by the air-fan driven by the “female” compressor unit rotor, ensuring only one source of energy consumption in the NZ PACK station. Water cooling is based on high efficiency oil and water coolers, equipped with condensate separator for automatic or manual dirt removal.

The oil system used on NZ compressors is characterized by the specific oil circulation based on pressure difference between the oil tank and the compressing unit. Thus, the quantity of oil used for heat removal, sealing and lubrication, depends on the operating conditions but it ensures lower energy consumption, constant oil temperature and lesser danger of leakage or interruption of oil flow.

        - The main quantity of oil is removed from the compressed air by the course oil-separator which also serves as the main oil reservoir.

        - The high-efficiency oil separator ensure that the oil content in the compressed air ranges between 2-4 mg/m3.

Capacity regulation of the compressor is performed by the electro-pneumatic system which operates a pneumatic regulation valve at the intake side of the compressing unit. The compressed air delivery capacity range from 0 to 100%. When operating (unloaded), the calibrated regulation air provides the circulation of oil needed for lubrication of the screw element end the roller bearings.

The electric comand pannel provides full control of compressor operation, and includes the neccessary  alarm and service function indicators, as well as indicators for compressor operating parameters.

The nicely shaped housing made of pressed steel sheet is lined with temperature and sound absorbing material which keeps the nose below 75 dB(A). Compressor heat radiation is also reduced to minimum. Six doors allow easy access to all compressor station elements.