Oil Free Screw Blower Supplier & Factory Serving Slovakia

Traditional lobe/Roots blowers operate via external isochoric compression: air is carried across casing chambers at ambient pressure before abruptly encountering system backpressure at the outlet. This sudden backflow creates significant turbulence and thermodynamic losses. Screw blowers perform progressive, internal polytropic compression between the intermeshing male and female helical rotors before reaching the discharge port. By matching the internal volume ratio to the working head (typically 0.3 to 1.5 bar gauge), the machine saves the work represented by the indicator diagram's triangular area loss, reducing specific power input (kW/m³/min) by up to 35%.

The rotor compression chamber operates completely dry. Timing gears and heavy-duty roller bearings are isolated in an oil sump separated by a dual-stage sealing arrangement. This configuration features carbon ring seals backed by non-contact multi-path labyrinths with atmospheric bleed cavities in between. Any pressurized oil mist is vented safely to the atmosphere rather than migrating along the shaft into the active compression chamber. The design is independently verified to ISO 8573-1 Class 0 standard, ensuring zero oil contamination.

Yes. For installations in northern Slovakia (such as Poprad, Žilina, or Ružomberok) where ambient temperatures can dip below -20°C, our packages offer an optional low-temperature engineering kit. This package incorporates thermostatically controlled gear oil heaters, synthetic PAG low-viscosity gear lubricants, automatic condensate drain trace heating, and insulated acoustic canopies to prevent startup bearing starvation and cold-temperature air moisture freezing.

Because biological aeration basins operate around the clock (8,760 hours per year), electricity typically represents over 80% of total lifecycle expenditures. Under typical European industrial electricity tariffs (€0.14 to €0.22/kWh), replacing a 75kW Roots blower running at 80% duty cycle with a 55kW high-efficiency PM VSD screw blower typically saves 120,000 to 160,000 kWh annually. This equates to an operational savings of €16,000 to €35,000 per year, yielding full equipment payback in 14 to 22 months.

We provide comprehensive commissioning spare packages (air intake filters, synthetic lube oil, replacement sealing rings, timing belt kits) alongside direct factory air-courier dispatch for emergency parts within 48 to 72 hours. All wear components utilize standardized European bearing configurations (SKF/FAG) and Schneider/Siemens electrical switchgear, ensuring qualified Slovak electromechanical contractors can complete scheduled preventive servicing locally without long factory delays.