SCR-G Screw compressors
Basic description
- Oil-free air class 0 according to ISO 8573-1
- Unique airend technology
- Smooth speed control with frequency converter (GV)
- Efficient cooling system
- ROTEX peak elastic coupling
- SCR-9000 electronic controller
- Above-standard optional variants
Pressure versions: 7-8-10 bar
Delivery volume: 150 to 2,820 Nm3/h
Oil-free air applications
Many industrial companies require consistently high-quality compressed air, especially with regard to oil content. For some sensitive applications, it is absolutely essential to have an efficient supply of 100% oil-free compressed air that complies with class 0 as defined by ISO 8573-1.
Food production
Beverage industry
Automotive manufacturing
Pharmaceutical industry
Electronics manufacturing
Glass industry
Machine design
Design layout of individual oil-free compressor parts SCR-G compressors is designed to ensure optimal cooling of the compressor's interior and good service access to all important machine parts.
airend with gearbox
flexible coupling
electric motor
air filter
intake flap
oil cooler
intercooler
aftercooler
frequency converter
fan motor
cyclone separator
air outlet
Technical characteristics
High-performance screw blocks
SCR-G series compressors are equipped with screw blocks of the highest possible quality so that they can produce completely oil-free compressed air with the lowest possible operating costs and the longest possible operating time. The excellent properties of the screw blocks on SCR-G compressors are primarily based on advanced materials and technologies.
Rotor material - the first-stagerotors are made of high-quality carbon steel, while the second-stage rotors are stainless steel; the high quality of the materials prevents corrosion and reduces premature wear of the rotor coating. Rotor and housing block material – the rotorsand the inner wall of the screw block housing are coated with a special MoS2-based coating. Double sealing – the rotorchamber is securely separated from the gearbox by a labyrinth and hermetic seal made of stainless steel to completely prevent the ingress of gearbox oil. Shaft bearings – to eliminate the risk of contact and wear, the shafts are mounted in SKF radial and axial bearings and gear wheels.
SCR9000 electronic controller
A modern system for controlling the operation of screw compressors with a convenient 7" colour touch screen and the following functions and features:
- button control
- display of all necessary parameters about machine operation
- indication of operational warnings and alarms
- alarm history for machine fault analysis
- user level via password
- practical display of electricity consumption
- weekly plan with 5 time slots for compressor start-up and shutdown
- automatic restart after power failure
Efficient cooling system
When compressing air in the screw block of dry-running SCR-G compressors, the absence of oil and the extreme rotation of the rotors generate a large amount of heat reaching up to 200 °C, which must be effectively removed from the system and the entire machine. SCR-G compressors are therefore equipped with oversized coolers and an efficient ventilation system. Oil cooler -
Oil cooler - ensures a reduction in the temperature of the transmission oil. Intercooler - reduces the temperature of the air after it has been compressed by the first compression stage; the cooled air is fed from the intercooler to the second stage. Aftercooler - reduces the temperature of the air leaving the second compression stage; the air cooled by the aftercooler mixes at the compressor outlet.
Completely oil-free air
The screw blocks meet the requirements for oil-free air with compressed air quality class 0 according to ISO 8573-1.
Frequency converter
SCR-GV compressors are equipped with INOVANCE variable frequency drives with very high energy efficiency.
Optional variants
All oil-free screw compressors of the SCR-G series can also be supplied equipped with a wide range of optional enhanced configurations designed to meet specific requirements and operational conditions of individual users.
Water-cooled
For increased compressor efficiency and reduced machine noise.
Heat recovery
Use heat to heat water using a water-air exchanger.
PM motor
Permanent magnet motors with IE4 efficiency.
Cyclone separator
Integrated into the machine for removing water at the outlet.
HOC treatment
For connection to a lossless dryer with thermal regeneration.
Vibrodiagnostics
Sensors installed to detect the condition of the bearings.
Technical specifications
SCR-G screw compressors with fixed speeds - air-cooled
FAD performance is measured according to ISO 1217 and is given for the maximum pressure of the given model; other FAD performance values at different pressures can be found in the technical data sheets available on request.
Noise levels are given at a distance of 1 m from the machine.
SCR-WG screw compressors with fixed speeds - water-cooled
FAD performance is measured according to ISO 1217 and is given for the maximum pressure of the given model; other FAD performance values at different pressures can be found in the technical data sheets available at
. Noise levels are given at a distance of 1 m from the machine.
SCR-G/WG screw compressors with fixed speeds – machine dimensions
SCR-GV screw compressors with speed control - air-cooled
FAD performance is measured according to ISO 1217 and is given for the maximum pressure of the given model; other FAD performance values at different frequencies and pressures can be found in the technical data sheets available on request.
Noise levels are measured at a distance of 1 m from the machine.
*Compressors are equipped with a permanent magnet motor.
SCR-WGV screw compressors with speed control - water-cooled
FAD performance is measured according to ISO 1217 and is specified for the maximum pressure of the given model; other FAD performance values at different frequencies and pressures can be found in the technical data sheets available at
. Noise levels are specified at a distance of 1 m from the machine.
*Compressors are equipped with a permanent magnet motor.
SCR-GV/WGV screw compressors with speed control - machine dimensions
Information materials
Brochure for download
CZ VERSION, PDFInstallation examples
Several thousand oil-free SCR-G series screw compressors are subjected to rigorous testing every day during operation in industrial plants, including climatic conditions with extremely high temperatures and humidity. The SCR brand has a long history of successful projects and experience with compressor stations with a total power output of several MW.
