Multistage Centrifugal Blowers & Exhausters

Depending on the model, the inlet and oulet heads and intermediate sections are made of either cast iron or aluminium. In order to suit the pressure requirements, it is possible to vary the number of stages with a maximum of 10 on the small machines and 7 on the larger ones. The heads and intermediate sections are spigotted to each other and clamped together by steel tie-rods. The inlet and outlet connections are normally mounted vertically, but if required may be oriented differently. Sealing between the components is ensured by the use of a compound sealant or, in certain cases, by ”O” rings.

Impeller Assembly

The impellers are cast in treated aluminium alloy, and for certain applications are fabricated by riveting. All impellers are statically balanced, then keyed to a ground carbon steel shaft. The complete rotor assembly is then dynamically balanced so as to ensure a minimum vibration amplitude of 30 MIC when running. Different types of impeller are available, i.e. radial or curved, which enables us to meet a wider variety of duties.

Bearing Housings

The bearings are mounted in independent cast iron housings. These housings are securely bolted to the inlet and outlet heads, and allow easy access for routine maintenance. The bearings are the only running contacts between the shaft and casing. Sealing of the housing is by graphitized straps, or on the larger machines by segmented carbon rings, which are held together by a stainless steel spring. Leakage is thus reduced to a minimum with this type of seal. In the case of aggressive gases, sealing is by the use of double mechanical seals. The bearings are lubricated either using grease for machines up to 5000 m3/h or by oil replenishment by a constant level oiler for the larger machines.

• Carbon black production
• Sulfur recovery
• Furnaces in smelters & refineries
• Waste water treatment aeration
• Electroplating tank solution agitation
• Sugar conditioning
• Glass tempering
• Fluidizing
• Asphalt oxidation
• Fermentation process
• Filter cake dewatering
• Pneumatic conveying
• Drying of metal & non metal strips
• Air Knives
• LNG plants
• Asbestos dust removal
• Paper dust pick up and slitter knives
• Zinc coating
• Clean and super clean rooms
• Central vacuum cleaning system for over 100 applications
• Paper dewatering
• Textile and carpet dewatering
• Cooling and heating
• Supercharging
• Gas boosting
• Process air
• Air purging
• Quinching
• Air curtains
• Air cushions
• Air sampling
• Metal and plastic extrusion
• Fish ponds and aquaculture tanks aeration
• Exhaust and corrosive fumes removal
• Bio-gas recovery
• Methan removal/soil clean up
• Digester gas
• Combustion processes
• Military aircraft ground support equipment
• Vacuum holding
• Steam removal
• Flotation
• Etc...

Three years of research in association with the National Sciences Institute of Lyon enabled us to develop a fix test laboratory meeting the latest ASME PTC 10 standards requirements. In this ultra-modern laboratory located over more than 1000 sqm, the information gathered are interprated and optimized by a computerized data bank specially designed. The various parameters : air flow, pressure, air speed, soud level, temperature, vibrations amplitude and propagation, surge are direct dealt by computer. These parameters evaluate the spontaneous performances of the equipements and actualize the real working site conditions. The use of certified motors enable us to issue accurate certificates to our customers and upon request, the performance curves of their machine.

• Vibration test report
• Certificate of compliance material
• Dynamic balancing report
• Hydraulic test report
• Coupling alignment report
• Impeller penetration dye test report

As a result for our constant concern to improve our performance and by investing a large part of our resources in research, we have adapted and modernized our plant to meet a wider variety of demands. Our machining area is now operated by computerized digital control.

Greater Flexibility

Thanks to this modernization, we have better control over production, and can now ensure our customers even greater flexibility and even shorter delivery times. In addition, spare parts and accessories can be dispatched within 24 hours.

Special Applications

Whatever your problem of air or toxic gas you can rely on our experience:

• Casing sealed by vacuum impregnation using “loctite”,
• Chemical treatment with nickel, HALLAR or Teflon,
• Stainless steel impellers and shafts,
• Sealing ensured by double carbon rings or, in extreme cases, double mechanical seals,
• Protection of the blower body by an explosion proof housing,
• Non sparking drive guard (aluminium),...