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Help CenterThe Saman Mobile Screw Air Compressors Can be Divided Into Diesel Mobile Screw Air Compressors and Electric Mobile Screw Air Compressors.
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The mobile screw air compressors are classified based on six dimensions: drive method, lubrication form, pressure/flow rate, moving structure, cooling method, and number of compression stages. The core classification is diesel/electric, fuel injection/oil-free, single-stage/double-stage, air-cooled/water-cooled, tractor-type/vehicle-mounted type, suitable for scenarios without fixed air sources such as in the wild, construction sites, and mines.
1. By drive method (the most mainstream classification)
1) Diesel-driven mobile (Diesel)
Core: Diesel engine + screw compressor, self-powered, no need for grid power.
Features: Independent power supply, strong off-road capability, all-weather operation; power 15–600HP, air volume 3–40m³/min, pressure 7–25bar.
Applications: Mines, tunnels, field exploration, remote construction sites (without grid power).
Representatives: Cummins / Yuchai Power, Euro V emission standards, stable operation from -15℃ to 46℃.
Diesel-powered mobile screw air compressor
2) Electrically-powered mobile (electric)
Core: Three-phase motor (380V) + screw main unit, requires external power supply.
Features: Low cost, low noise, low emissions, easy maintenance; power 7.5–160kW, exhaust volume 1–25m³/min, pressure 7–13bar.
Applications: Urban infrastructure, factory relocation, temporary projects (with mains electricity).
Representative: IP55 protection motor, permanent magnet variable frequency (VSD) energy-saving by 30%+.
Electrically-driven mobile screw air compressor
II. According to lubrication method (air quality is the key factor)
1) Oil-injected screw (oil lubrication, mainstream)
Principle: Special lubricating oil is sprayed into the compression chamber to cool, seal, and lubricate the rotor.
Features: High efficiency, low cost, durable; exhaust contains 3–5 ppm of oil, requires three filters for maintenance.
Applications: General pneumatic tools, sandblasting, spraying, mining machinery.
2) Oil-free screw (dry / water lubrication)
Principle: The rotor is lubricated without contact and without oil (synchronous timing gears), with 0-grade oil-free compressed air.
Features: Clean air, no oil pollution; high price, requires multiple stages of compression and cooling.
Applications: Food, medicine, electronics, precision coating, chemical processes.
Oil-free mobile screw air compressor
III. By number of compression stages (pressure / efficiency)
1) Single-stage compression (conventional)
Structure: One pair of male and female rotors for one compression cycle, pressure 7–13 bar, high efficiency, simple structure.
Applicable to: 80% of engineering scenarios (pressure ≤ 13 bar).
2) Double-stage compression (high pressure / energy saving)
Structure: High and low pressure rotors connected in series, with intermediate cooling, pressure 18–35 bar, 15–25% more energy-efficient than single-stage.
Applicable to: well drilling, high-pressure pile breaking, deep-sea operations, mine blasting.
Two-stage compression mobile screw air compressor
IV. According to mobile structure (mobility)
1) Tractor type (two-wheel / four-wheel traction, mainstream)
Structure: chassis + off-road tires + traction rods, can be towed by trucks / tractors, speed ≤ 80 km/h.
Features: Flexible transfer, strong off-road capability, suitable for construction sites / mines.
Classification:
Two-wheel light type: 7.5–22 kW, single axle, suitable for short-distance movement.
Four-wheel heavy type: 37–160 kW, double axle, stable load-bearing, suitable for long-distance / complex road conditions.
2) Vehicle-mounted type (trucks' chassis integration)
Structure: air compressor + diesel / electric motor + control system integrated into the truck chassis, with built-in driving power.
Features: Fast transfer, no need for towing, suitable for frequent movement / remote operations.
Applications: Road emergency repairs, emergency rescue, mobile gas supply stations.
Mobile and Portable Screw Compressors
3) Portable (small wheeled / hand-pushed)
Structure: Small main unit + storage tank + small casters, power ≤ 15kW, single person can push.
Features: Compact and lightweight, flexible for indoor use, suitable for small projects / decoration.
Five. According to cooling method (environmental adaptation)
1) Air-cooled (mainstream, 90% of models)
Principle: Fan + finned heat exchanger, air convection cooling, no water source required.
Features: Simple structure, no scale formation, suitable for water shortage / outdoor conditions, -15℃ ~ 46℃ usable.
2) Water-cooled (large / high-temperature scenarios)
Principle: Cooling water circulation + water cooler, high heat dissipation efficiency, suitable for high temperature / high-load conditions.
Features: Requires external water source / cooling tower, large volume, suitable for fixed mobile points / high-temperature mines.
Six. According to exhaust pressure / flow rate (matching of working conditions)
Pressure classification
Low pressure: 0.7–1.0MPa (7–10bar), general engineering.
Medium pressure: 1.2–2.5MPa (12–25bar), drilling / pile driving.
High pressure: 2.5–3.5MPa (25–35bar), mining blasting / deep-sea operations.
Flow rate classification
Small: 1–6m³/min, 7.5–22kW, hand-pushed / two-wheel.
Medium: 6–15m³/min, 37–75kW, four-wheel traction.
Large: 15–40m³/min, 90–160kW, four-wheel / mobile vehicle.
Seven. Other special types
Permanent magnet variable speed (VSD): Electric model with permanent magnet motor, 10–100% stepless speed regulation, energy saving by 30%+, suitable for fluctuating gas usage.
Silent type: Fully enclosed soundproof cover, noise ≤ 72dB, suitable for urban / residential area operations.
Explosion-proof type: Entire machine explosion-proof design, suitable for petroleum / chemical / flammable and explosive environments.
Selection quick-reference table (by scenario) Table
Scene Recommendation Type Key Parameters
Outdoor mines / tunnels Steam engine + fuel injection + single stage + air cooling + four wheels 10–25m³/min, 10–13bar
Urban infrastructure / decoration Electric + fuel injection + single stage / double stage + air cooling + two wheels 3–6m³/min, 7–8bar
Food / medicine / precision Electric + oil-free + single stage / double stage + air cooling 1–10m³/min, 7–10bar, 0th level oil-free
High-pressure drilling / pile breaking Steam engine + fuel injection + double stage + air cooling + four wheels 5–15m³/min, 18–25bar
Temporary emergency / repair Portable + steam engine + single stage + air cooling 6–12m³/min, 10bar
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