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STANDARD POSITIVE DISPLACEMENT
BLOWERS
With nearly a hundred of years experience in the manufacture and the sale of rotary positive displacement blowers, BOC Edwards has a large range of two and three-lobe version blowers specially designed to meet the requirement of standard air or neutral gas applications: efficient, competitive and robust solutions.
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For the three-lobe blowers, pulsation control males is the right choice for applications where thin-wall piping or ducting is used, for example, and where the avoidance of resonance or minimization of discharge noise is essential. Two-lobe blowers are especially useful in territories where economy of operation is important and where pulsation control is less so. The two-lobe design is also less sensitive to particle contamination.
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THREE-LOBE BLOWERS SERIES - SN SERIES BLOWERS
How it works
Positive displacement blowers are based on the tried and tested volumetric principle by which the volume generated is proportional to the speed of rotation, providing a guaranteed 100% oil-free air and a transported gas that is free of any contamination. They consist of two identical ‘Three-lobe’ rotors which mesh in opposite direction thanks to a set of synchronized gears, with no friction and no lubrication, within an oblong body. The rotor profile has been perfected to the point where blowers provide maximum efficiency under all operating conditions.
• Bearings
- Life duration calculation done with ISO281 / AFBMA L10 standard for 50000 hours Lh10
- Five bearings for improved reliability
- Suitable for all types of drive units including very compact transmissions
- Heavy duty roller bearing at shaft end
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• Sealing
- Piston rings and labyrinth, oil slingers ensure oil free gas transfer
• Gears
- SN blowers are fitted with synchronized ground helical** gears
- Located at drive end for more input torque capability
• Oil lubrication at both ends
- Two large capacity cast iron oil casings
- Fins on casings ensure cooling of oil
• Rotors
- Three lobes
- Integral rotors shaft for models SN 803, SN 804, SN 806, SN 809, SN 811, SN 822 (index A)
• Body
- Cast iron with damper system* to reduce noise and in-pipe pulsation
- Detachable feet allow mounting in vertical /horizontal mode
- Conformity to EC safety standards
* except SN 801 and SN 802
** Blowers SN 801, SN 802, SN 892 are fitted with spur gears located on driven end |
