Rotary Screw Air Compressors
L Series 7 - 11 kW
Fixed & Regulated Speed
Well known in the industry for quality and reliability, CompAir continuously develops and expands the L-Series to achieve optimum performance and efficiency and maximum flexibility. The wide range of screw compressors from 7 to 11 kW includes fixed and regulated speed models, high efficiency models and is available as airstation including receiver and refrigerant dryer.
📌 Overview – L-Series 7–11 kW Rotary Screw Compressors
These compressors are oil-flooded rotary screw machines designed for continuous operation with a reliable flow of compressed air. The L-Series units (often exemplified by CompAir models L07 and L11) are available in fixed-speed and regulated/variable-speed versions and can be supplied as stand-alone units or integrated air-station packages with receiver and refrigerated dryer.
🔧 Typical Specifications (7–11 kW range)
🛠️ Power & Performance
Motor power: 7.5 – 11 kW (≈10–15 HP)
Pressure range: ~5 – 13 bar (72 – 188 psi)
Free Air Delivery (FAD): roughly 0.41 – 1.87 m³/min (varies by model & pressure)
Noise level: usually ~63 – 70 dB(A) depending on model and enclosure
📈 Drive & Control
Drive: belt-driven rotary screw airend (single stage, oil lubricated)
Speed variants:
• Fixed-speed models — constant motor speed.
• Regulated/variable-speed (RS) models — inverter drive matches air output to demand for energy savings (up to ~35% at partial load).
Controller: modern microprocessor controllers (C-PRO2.0 or equivalents) with fault logging, Modbus communication options on RS versions.
🧰 Design Features
Integrated air-oil separation, oil filter, thermostatic valve — optimized for reliable and efficient compression.
Automatic belt tensioning (on many RS models) to reduce maintenance.
Compact footprint with options for integrated dryer/receiver packages.
High-efficiency motors (typically IE3 with IP55 protection).
📦 Physical / Installation
Typical footprints are small (compact industrial size) — often ~0.4 m².
Air-station options include receiver tanks (e.g. 80 – 120 gal) and refrigerated dryers for improved downstream air quality.
📌 Applications
L-Series compressors are widely used in:
• Manufacturing units and workshops
• Automotive service and repair
• Food processing
• Pharmaceuticals & electronics manufacturing
• Textile and general industrial plants
📌 Benefits of L-Series (7–11 kW)
✔ Reliable industrial-duty design with long service life.
✔ Energy-efficient options (variable speed) for fluctuating demand.
✔ Compact size & quiet operation — allows placement near point of use.
✔ Wide control & service options, modular configurations.
