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Product Definition
The Rocky RKEB70H‑220RS is an oil‑free screw blower engineered for low‑pressure, high‑volume industrial air supply. It adopts twin‑screw compression technology with internal compression, delivering 60 Nm³/min at 2 bar, powered by a 220 kW motor. The compression chamber operates completely oil‑free, ensuring 100% clean air that meets ISO 8573‑1 Class 0 standards – ideal for processes where air purity is critical.
The compression chamber is completely oil-free, eliminating any risk of oil contamination in your end product or process. Certified to ISO 8573-1 Class 0 – the highest standard for air purity. This makes our blower the ideal choice for industries where air quality is critical.
Thanks to the internal compression principle, screw blowers deliver significantly lower energy consumption compared to traditional lobe blowers, as very little energy is lost to heat. On average, you can save up to 35–40% on energy costs compared to lobe or Roots-type technology. With energy costs accounting for up to 80% of a blower's lifecycle cost, this translates into substantial long-term savings.
No oil filters, separators, or oil disposal systems required – eliminating costly consumables
Fewer wearing parts – timing gears prevent rotor contact, reducing mechanical wear
Extended service intervals – less downtime and lower operating costs
Excluding the need for maintenance on pulleys and belts – significantly reduces service costs compared to lobe blower installations
Professional customized intake and exhaust silencers, combined with a fully enclosed soundproof cover, reduce noise levels significantly – up to 30 dB(A) lower than Roots blowers. Noise levels can be as low as < 68 dB(A), greatly improving operator comfort and working conditions.
Modern oil-free screw blowers feature highly integrated designs with a compact footprint – easy to install in existing blower rooms, even side-by-side. Plug & Play installation – no need to source additional equipment.
Equipped with Permanent Magnet Motor and Variable Speed Drive (VSD) technology, our blowers automatically adjust output to match real-time demand – maximizing efficiency even under partial loads. Integrated controllers support:
Real-time monitoring and remote diagnostics
Predictive maintenance alerts
RS485 communication and joint control
Wireless access from PC, tablet, or mobile phone
IE3 / IE4 permanent magnet motor – IP54 protection, suitable for harsh environments
Patented screw rotor profile – optimized 5:6 rotor design for higher efficiency and minimal clearance
Composite coating – high-temperature resistance (up to 270°C), impact resistance, and corrosion resistance
CE certified – compliant with international standards
Widely used in wastewater treatment (aeration), pneumatic conveying, cement production, chemical processing, power generation, food & beverage, pharmaceuticals, textiles, pulp & paper, and steel/metallurgy – anywhere reliable, oil‑free air is essential.
