AirHorse AHL Series Low Pressure Screw Air Compressor – Energy-Efficient Direct Driven & Two-Stage Options
Short Description:
AirHorse AHL series low pressure screw air compressor is designed for applications requiring large air flow at low working pressure (3–5 bar). Available in single-stage and two-stage configurations, power range 15–250 kW, air flow 3.8–59.8 m³/min. It features high-efficiency air end, IE4/IE5 equivalent three-phase asynchronous motor, optimized intake and oil separation system, touch screen controller, and low noise/low vibration operation. Ideal for textile, glass, food, chemical, and general low-pressure industrial processes.
Product Overview:
AirHorse AHL series low pressure screw air compressor is developed for customers who need a large volume of compressed air at lower pressure. Compared with standard 7–8 bar compressors, the AHL series reduces energy consumption by matching motor and air end design to low-pressure operation. It is available in both single-stage and two-stage models.
The air end adopts the latest rotor profile with high-precision machining, reducing compressed gas leakage and power consumption. The motor is selected according to different supply pressures, with star-delta starting to avoid instantaneous current rise and protect the motor and power grid. The electrical system includes overload protection. When the motor is stuck or the air supply system causes overload, the motor stops when temperature exceeds the set value, preventing overheating and fire risk.
The intake system uses an enlarged air filter to keep intake pressure difference around 2 kPa. A specially selected intake valve integrates relief valve, air supplement valve, inverse proportional valve, solenoid valve and filter. The air supplement valve eliminates cavitation during start-up and unloading, reducing vibration and noise. The inverse proportional valve balances air supply and consumption, achieving stepless air volume adjustment.
The oil and air separation system uses a super-large oil separator tank and oil separation core, ensuring oil content below 3 ppm. The piping system is enlarged to reduce local pressure loss and energy loss. An oil pump ensures internal lubricating oil circulation under low exhaust pressure.
The touch screen controller provides simple operation, energy-saving mode, remote operation conversion, fault display, timer operation and alternate operation functions. Single-touch pressure setting change is available. AirHorse in-line vector control and PID control ensure fast response, safety and reliability. Exhaust pressure control accuracy is ±0.01 MPa.
Key Features & Advantages:
Low pressure design – optimized for 3–5 bar operation, large air flow, energy saving
High-efficiency air end – latest rotor profile, high-precision machining, low leakage, low power consumption
IE4/IE5 equivalent motor – national first-class energy efficiency, IP54 protection, long-term efficient operation
Star-delta starting – reduced voltage start, avoids current surge, protects motor and grid
Overload protection – motor stops when temperature exceeds set value, preventing overheating
Optimized intake system – enlarged air filter, intake pressure difference ~2 kPa, integrated intake valve with relief, air supplement, inverse proportional, solenoid and filter
Stepless air volume adjustment – inverse proportional valve balances supply and demand
High-efficiency oil separation – oil content below 3 ppm
Optimized piping – enlarged diameter, reduced pressure loss, oil pump for low pressure circulation
Touch screen controller – energy-saving mode, remote operation, fault display, timer and alternate operation
Low noise, low vibration – stable operation, long life
Easy maintenance – few wearing parts, long overhaul interval, unattended operation possible
Two-stage models available – SLPML series for even higher efficiency at low pressure
Technical Specifications – Single-Stage Low Pressure
Model: AHL-20A | Power: 15 kW | Motor: 20 HP | Pressure: 3 bar | Air Flow: 3.8 m³/min | Outlet: G1 | Dimensions: 1200×900×1150 mm | Weight: 460 kg
Model: AHL-20A | Power: 15 kW | Motor: 20 HP | Pressure: 4 bar | Air Flow: 3.65 m³/min | Outlet: G1 | Dimensions: 1200×900×1150 mm | Weight: 460 kg
Model: AHL-30A | Power: 22 kW | Motor: 30 HP | Pressure: 3 bar | Air Flow: 5.8 m³/min | Outlet: G1 1/2 | Dimensions: 1560×1000×1365 mm | Weight: 645 kg
Model: AHL-30A | Power: 22 kW | Motor: 30 HP | Pressure: 4 bar | Air Flow: 5.5 m³/min | Outlet: G1 1/2 | Dimensions: 1560×1000×1365 mm | Weight: 645 kg
Model: AHL-50A | Power: 37 kW | Motor: 50 HP | Pressure: 3 bar | Air Flow: 10 m³/min | Outlet: G2 | Dimensions: 1800×1160×1490 mm | Weight: 900 kg
Model: AHL-50A | Power: 37 kW | Motor: 50 HP | Pressure: 4 bar | Air Flow: 7.6 m³/min | Outlet: G2 | Dimensions: 1800×1160×1490 mm | Weight: 900 kg
Model: AHL-50A | Power: 37 kW | Motor: 50 HP | Pressure: 5 bar | Air Flow: 7.3 m³/min | Outlet: G2 | Dimensions: 1800×1160×1490 mm | Weight: 900 kg
Model: AHL-60A | Power: 45 kW | Motor: 60 HP | Pressure: 3 bar | Air Flow: 12.8 m³/min | Outlet: G2 | Dimensions: 2100×1400×1780 mm | Weight: 1300 kg
Model: AHL-60A | Power: 45 kW | Motor: 60 HP | Pressure: 4 bar | Air Flow: 9.8 m³/min | Outlet: G2 | Dimensions: 1800×1160×1490 mm | Weight: 940 kg
Model: AHL-60A | Power: 45 kW | Motor: 60 HP | Pressure: 5 bar | Air Flow: 9.6 m³/min | Outlet: G2 | Dimensions: 1800×1160×1490 mm | Weight: 940 kg
Model: AHL-75A | Power: 55 kW | Motor: 75 HP | Pressure: 2 bar | Air Flow: 19 m³/min | Outlet: G2 1/2 | Dimensions: 2700×1550×2100 mm | Weight: 2750 kg
Model: AHL-75A | Power: 55 kW | Motor: 75 HP | Pressure: 3 bar | Air Flow: 16 m³/min | Outlet: G2 | Dimensions: 2100×1400×1780 mm | Weight: 1450 kg
Model: AHL-75A | Power: 55 kW | Motor: 75 HP | Pressure: 4 bar | Air Flow: 12.5 m³/min | Outlet: G2 | Dimensions: 1800×1160×1490 mm | Weight: 1100 kg
Model: AHL-75A | Power: 55 kW | Motor: 75 HP | Pressure: 5 bar | Air Flow: 12.3 m³/min | Outlet: G2 | Dimensions: 1800×1160×1490 mm | Weight: 1100 kg
Model: AHL-100A | Power: 75 kW | Motor: 100 HP | Pressure: 2 bar | Air Flow: 28.58 m³/min | Outlet: DN80 | Dimensions: 3100×1750×2250 mm | Weight: 3050 kg
Model: AHL-100A | Power: 75 kW | Motor: 100 HP | Pressure: 3 bar | Air Flow: 20 m³/min | Outlet: G2 1/2 | Dimensions: 2500×1450×1800 mm | Weight: 2050 kg
Model: AHL-100A | Power: 75 kW | Motor: 100 HP | Pressure: 4 bar | Air Flow: 15.7 m³/min | Outlet: G2 | Dimensions: 2100×1400×1780 mm | Weight: 1500 kg
Model: AHL-100A | Power: 75 kW | Motor: 100 HP | Pressure: 5 bar | Air Flow: 15.4 m³/min | Outlet: G2 | Dimensions: 2100×1400×1780 mm | Weight: 1500 kg
Model: AHL-120A | Power: 90 kW | Motor: 120 HP | Pressure: 3 bar | Air Flow: 23 m³/min | Outlet: G2 1/2 | Dimensions: 2700×1550×1800 mm | Weight: 2350 kg
Model: AHL-120A | Power: 90 kW | Motor: 120 HP | Pressure: 4 bar | Air Flow: 22.5 m³/min | Outlet: G2 1/2 | Dimensions: 2700×1550×1800 mm | Weight: 2350 kg
Model: AHL-120A | Power: 90 kW | Motor: 120 HP | Pressure: 5 bar | Air Flow: 19.3 m³/min | Outlet: G2 1/2 | Dimensions: 2500×1450×1800 mm | Weight: 2150 kg
Model: AHL-150A | Power: 110 kW | Motor: 150 HP | Pressure: 3 bar | Air Flow: 28.6 m³/min | Outlet: DN80 | Dimensions: 2800×1550×1950 mm | Weight: 3300 kg
Model: AHL-150A | Power: 110 kW | Motor: 150 HP | Pressure: 4 bar | Air Flow: 28.3 m³/min | Outlet: DN80 | Dimensions: 2800×1550×1950 mm | Weight: 3300 kg
Model: AHL-150A | Power: 110 kW | Motor: 150 HP | Pressure: 5 bar | Air Flow: 22.2 m³/min | Outlet: G2 1/2 | Dimensions: 2700×1550×1800 mm | Weight: 2650 kg
Model: AHL-175A | Power: 132 kW | Motor: 175 HP | Pressure: 3 bar | Air Flow: 39 m³/min | Outlet: DN80 | Dimensions: 3700×2150×2250 mm | Weight: 4700 kg
Model: AHL-175A | Power: 132 kW | Motor: 175 HP | Pressure: 4 bar | Air Flow: 31.1 m³/min | Outlet: G2 1/2 | Dimensions: 2700×1550×1800 mm | Weight: 3150 kg
Model: AHL-175A | Power: 132 kW | Motor: 175 HP | Pressure: 5 bar | Air Flow: 27.9 m³/min | Outlet: G2 1/2 | Dimensions: 2700×1550×1800 mm | Weight: 3150 kg
Model: AHL-220A | Power: 160 kW | Motor: 220 HP | Pressure: 3 bar | Air Flow: 43 m³/min | Outlet: DN80 | Dimensions: 3700×2150×2250 mm | Weight: 4700 kg
Model: AHL-220A | Power: 160 kW | Motor: 220 HP | Pressure: 4 bar | Air Flow: 38.9 m³/min | Outlet: DN80 | Dimensions: 2800×1550×1950 mm | Weight: 3450 kg
Model: AHL-220A | Power: 160 kW | Motor: 220 HP | Pressure: 5 bar | Air Flow: 31.4 m³/min | Outlet: DN80 | Dimensions: 2800×1550×1950 mm | Weight: 3450 kg
Model: AHL-250A | Power: 185 kW | Motor: 250 HP | Pressure: 3 bar | Air Flow: 43 m³/min | Outlet: DN80 | Dimensions: 3700×2150×2250 mm | Weight: 5000 kg
Model: AHL-250A | Power: 185 kW | Motor: 250 HP | Pressure: 4 bar | Air Flow: 42.7 m³/min | Outlet: DN80 | Dimensions: 3700×2150×2250 mm | Weight: 5000 kg
Model: AHL-250A | Power: 185 kW | Motor: 250 HP | Pressure: 5 bar | Air Flow: 38.9 m³/min | Outlet: DN80 | Dimensions: 3250×2100×2300 mm | Weight: 4050 kg
Applications:
AirHorse AHL series low pressure screw air compressors are widely used in:
Textile industry (air-jet looms)
Glass processing
Food and beverage
Chemical industry
Pharmaceutical industry
Cement and bulk material conveying
Wastewater treatment (low pressure aeration)
General low-pressure industrial processes
Why Choose AirHorse AHL Series?
Specifically designed for low pressure (3–5 bar) and large air flow
Energy-efficient motor and air end matching
Single-stage and two-stage options
Reliable star-delta starting and overload protection
High-efficiency oil separation (≤3 ppm)
Optimized intake and piping system for low pressure loss
Intelligent touch screen controller with remote operation
Low noise, low vibration, long service life
Easy maintenance and unattended operation possible
After-Sales Service
AirHorse Compressor Co., Ltd. has a sales and service network in China divided into five major regions: East China, South China, West China, North China and Northeast China, with more than 200 outlets. Offices have been set up in major cities, with excellent service staff providing quality and fast service.
We provide selective maintenance services, long-term parts supply, preventive maintenance contracts, and energy-saving solutions such as energy recovery, frequency conversion retrofit and energy-saving optimization systems.