SCR-H Screw compressors
Basic description
- Oil-lubricated airend
- two-stage design
- Smooth speed control with frequency converter (HPM)
- gearbox drive
- ROTEX peak elastic coupling
- SCR-9000 electronic controller
- Above-standard pressure and temperature measurement options
Pressure versions: 7-8-10-12.5 bar
Delivery volume: 1,200 to 3,510 Nm3/h
Machine design
The design of the individual parts of the SCR-H compressors is such that the interior of the compressor is optimally cooled and, at the same time, good service access to all important components is ensured.
airend with gearbox
flexible coupling
electric motor
air filter
intake valve
oil reservoir
minimum pressure valve
Thermostatic valve
oil filters
fan motor
radiator
air inlet
Technical characteristics
Two-stage air compression
For higher efficiency, two-stage compressors were developed, which use two screw blocks connected to each other by a gear mechanism, in which the air is cooled in the space between the 1st and 2nd stages and the resulting curve is approximated to isothermal compression.
1st stage rotors
2nd stage rotors
cooling space
gearbox
SCR9000 electronic controller
A modern system for controlling screw compressors with a convenient 7" colour touch screen and the following functions and features:
- button control
- display of all necessary machine operating parameters
- indication of operating 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
Oil reservoir
With a practical swivel cap, glycerine pressure gauge and oil gauge.
Metal fluid connections
All air and oil connections are made with pipes and steel hoses.
Air filter
Highly robust design with 99.5% efficiency, doubled for increased protection of the airend.
Clutch
A high-quality ROTEX flexible coupling from German manufacturer KTR is used to connect the electric motor to the gearbox.
Fans
The compressors use powerful fans for perfect machine cooling. In the SCR-HV design, one of the fans is equipped with speed control.
Sensors
The compressors are equipped with above-standard temperature and pressure sensing capabilities.
Oil filters
Serial arrangement for optimal filtration of oil from solid impurities and with pressure drop detection.
Electrical switchboard
Equipped with top-of-the-line components from SIEMENS with high reliability.
Optional variants
All two-stage screw compressors in the SCR-H series can also be supplied with optional extras that further improve their performance.
Water cooling
for increased compressor efficiency and reduced machine noise.
Heat recovery
uses heat from the compressor to heat domestic water using a water-oil exchanger.
Technical specifications
SCR-H screw compressors with fixed speeds
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-HPM screw compressors with speed control
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 at
. Noise levels are given at a distance of 1 m from the machine.
SCR-H/HPM screw compressors – dimensions
*SCR-HPM screw compressors with continuous speed control are equipped with an external frequency converter located outside the machine cabinet for outputs from 250 kW; its dimensions and weight are listed separately.
Information materials
Brochure for download
CZ VERSION, PDFInstallation examples
Thousands of two-stage SCR-H series screw compressors are subjected to the most rigorous testing every day in industrial and energy applications, 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.
