Oil-Free Screw Compressors

For applications where process operating conditions vary or where process gas composition is unpredictable, oil-free rotary screw compressors offer the best of both worlds - the reliability and pulsation-free rotary motion of centrifugal compressors. Screw compressors are also the best choice for applications in which no other compressor can operate economically. They can easily handle dirty, polymer forming process gases and process gases with entrained liquids.

Features & Benefits

Precise rotors and shafts
Shaft seals that isolate and protect
Dependable thrust bearings
Timing gears designed for consistent clearances
Choice of flange locations
Zero leakage drive shaft seal
Heavy-wall radial bearings for extra support
Strong, stable compressor frame

Application
Chemical, petrochemical, and refining industries

Steel industry

Pollution control and energy industries

Clean gas applications
Design

Compression is achieved by the intermeshing of a male and female rotor. As the male rotor is rotated, the intermeshing point - and with it, the process gas - moves from the suction port to the discharge port. Oil-free rotor screw compressors rely on extremely tight rotor-to-rotor and rotor-to-casing clearances to prevent internal recirculation of the compressed gas from discharge to suction. Timing gears synchronize rotation of the male and female rotors preventing metal-to-metal contact and eliminating the need for oil injection.
Specifications
Multiple internal volume ratios: 1.34, 1.64, 2.19, 2.69, 3.16

Pressure differential:L models, 10 to 150 psi; 0.7 to 10.3 barS models, 10 to 250 psi; 0.7 to 17.2 bar

Casing design pressure:Cast steel, 225 to 300 psig; 15.5 to 20.7 barg

Molecular weights: 2 to 140

Inlet temperature: -50° to 250°F; -45.5° to 121°C

Maximum temperature: 550°F; 288°C

Rotor tip speed: 150 to 550 ft/s; 45 to 168 m/s
Testing Capabilities
Every compressor is fully assembled and mechanically tested

Full string or complete unit testing is available

Compressor performance testing is available per PTC-9 and ISO 1217

All operational data is recorded and provided to the purchaser for future reference

GE Energy

User Tools

Oil-Free Screw Compressors

Features & Benefits

Oil-Free Screw Compressors

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