Oil Free Screw Compressors
Howden oil free screw compressors are used in applications that demand zero contamination of the gas being compressed. Our specialised sealing systems isolate the gas being handled from the compressor's oil system by various combinations of shaft seals. As there is no lubricating film present between the rotor surfaces, timing gears (external to the main pressure casing) are fitted to synchronise the rotors to prevent them touching each other. These features result in completely oil free gas delivery.
Applications
- refineries
- offshore platforms
- gas gathering plants
- petrochemical plants
- chemical plants
- synthetic fertiliser plants
- synthetic rubber plants
- mechanical vapour recompression
- refrigeration plants
Features
- specialized seal systems
- external timing gears
- flexibility of discharge orientation
- modular design
Benefits
- zero contamination
- reduced rotor wear
- compactness
- easier installation
Performance Characteristics
| Range |
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Model 127 |
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2 L/D Ratios |
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Model 204 |
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2 L/D Ratios |
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Model 255 |
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2 L/D Ratios |
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Model 408 |
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2 L/D Ratios |
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Model 510 |
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2 L/D Ratios |
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| Operating Speeds |
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2000 - 15,000RPM |
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| Capacity Range |
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300 - 26,000m³/hr |
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| Pressure Ratio |
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7 / 1 (Single Stage) |
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| Max Discharge Pressure |
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26bara |
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| Max Discharge Temperature |
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225oC |
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| Materials Casings |
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Cast Iron
Nodular Iron
Carbon Steel
LT Carbon Steel
12% Chrome Steel (S.S.) |
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Gases Handled
- acetylene
- ammonia
- blast furnace gas
- butadiene
- butane
- carbon dioxide
- carbon monoxide
- chlorine
- coke oven gas
- cracked gas
- ethane
- ethylene
- flare gas
- hydrogen
- lime kiln (soda ash) gas
- sour hydrocarbons
- natural gas
- nitrogen
- propylene
- propane
- styrene vent gas
- sour gas
- steam
- visbreaker off gas
- tail gas
- town gas
- vapour recovery
- VCM strip gas
