Comparisions
| Water-lubricated Oil-free
Single Screw Air Compressor |
Dry Oil-free
Double Screw Air Compressor |
|
| Working Principle | 
Water-lubricated Oil-free Single Screw |
Dry Oil-free Double Screw |
| Air Quality | 100% Oil Free | Oil in the gear |
| Air Purity | Clear air after purified by water | Contain dust and oil stain |
| Lubrication Media | Pure Water | Dry |
| Air Temp | Less than 55℃ | About 180~200℃ |
| Compression | Single-Stage | Two-stage |
| Cooling method | Don’t need cooling system | Need interstage and after Cooling system |
| Structure | Simple and Balance Structure | Radial load is not balance |
| Vibration and Noise | Low vibration and noise | High frequency noise due to the two screws |
| Durability | Ideal Rotation speed 3000r/min, theoretically zero load.
Long lifetime of the screw (30000h) and star wheel (50000h) |
Rotation speed 18000r/min, high loads on screws.
Short lifetime of screw (8000~18000h) |
| Maintenance | Only air and water filter elements | More spare parts |
Parameters
7~10bar Water-lubricated Oil-free Screw Air Compressor(VSD/PM VSD)
| Model | Pressure | Capacity | Power | Noise | Dimension(mm) | Weight |
|---|---|---|---|---|---|---|
| OTVS08F | 7 bar
8.5bar 10bar |
1.3m³/min
1.1m³/min 0.9m³/min |
7.5 kW 10 HP |
57dB | 1100×750×1320 | 430kg |
| OTVS11F | 7 bar
8.5bar 10bar |
1.7m³/min
1.5m³/min 1.3m³/min |
11 kW 15 HP |
57dB | 1100×750×1320 | 450kg |
| OTVS15F | 7 bar
8.5bar 10bar |
2.5m³/min
2.2m³/min 2.0m³/min |
15 kW 20 HP |
57dB | 1590×870×1500 | 570kg |
| OTVS18F | 7 bar
8.5bar 10bar |
3.2m³/min
2.8m³/min 2.5m³/min |
18.5kW 25 HP |
58dB | 1590×870×1500 | 620kg |
| OTVS22F | 7 bar
8.5bar 10bar |
3.7m³/min
3.4m³/min 3.0m³/min |
22 kW 30 HP |
60dB | 1590×870×1500 | 640kg |
| OTVS30F | 7 bar
8.5bar 10bar |
5.3m³/min
4.7m³/min 4.3m³/min |
30 kW 40 HP |
61dB | 1690×1000×1600 | 980kg |
| OTVS37F | 7 bar
8.5bar 10bar |
6.2m³/min
5.6m³/min 5.0m³/min |
37 kW 45 HP |
61dB | 1690×1000×1600 | 1010kg |
| OTVS45F | 7 bar
8.5bar 10bar |
7.6m³/min
6.8m³/min 6.0m³/min |
45 kW 60 HP |
65dB | 2350×1250×1750 | 1110kg |
| OTVS55F | 7 bar
8.5bar 10bar |
10.0m³/min
9.0m³/min 7.8m³/min |
55 kW 75 HP |
67dB | 2350×1250×1750 | 1200kg |
| OTVS75F | 7 bar
8.5bar 10bar |
13.0m³/min
12.0m³/min 10.0m³/min |
75 kW 100HP |
71dB | 2800×1450×1900 | 1550kg |
| OTVS90S | 7 bar
8.5bar 10bar |
16.8m³/min
15.0m³/min 14.0m³/min |
90 kW 120HP |
72dB | 2450×1450×1700 | 2250kg |
| OTVS110S | 7 bar
8.5bar 10bar |
20.0m³/min
18.5m³/min 16.0m³/min |
110kW 150HP |
74dB | 2450×1450×1700 | 2450kg |
| OTVS132S | 7 bar
8.5bar 10bar |
25.0m³/min
23.0m³/min 20.0m³/min |
132kW 180HP |
77dB | 2450×1450×1700 | 2450kg |
| OTVS160S | 7 bar
8.5bar 10bar |
27.0m³/min
25.5m³/min 24.0m³/min |
160kW 215HP |
78dB | 2800×1500×1900 | 2600kg |
| OTVS1855S | 7 bar
8.5bar 10bar |
33.8m³/min
31.0m³/min 28.8m³/min |
185kW 250HP |
78dB | 2800×1500×1900 | 3000kg |
| OTVS250S | 7 bar
8.5bar 10bar |
43.0m³/min
41.0m³/min 38.8m³/min |
250kW 340HP |
79dB | 3100×2250×2200 | 4500kg |
Details
Air endSince 1988 Material: Stainless steel, copper alloy, polymers |
MotorDirect Drive Insulation Class: F Protection Level: IP55 Bearing: SKF |
SeparatorClean and Safe air Material: Medical Stainless steel |
Inverter & ElectricInverter/PLC: Inovance Thermal relay/ A.C. Contractor: Siemens |
|
Control PannelBrand: Inovance Display all operation parameters and alarm system |
Water SoftenerBrand: Pentair Offer pure lubricating water and extend the service life of air end |
Control ValveBrand: SMC Imported famous brand component to ensure the stability |
CoolerHigh Efficiency Material: Copper Best Quality and Structure |
Advantages
- More than 20 years experiences in Water-lubricated Oil-free technology
- Germany Rhineland TUV Class 0 Oil-free Certification
- More than 30 years experiences in Single Screw Technology
- Most balance and reliable structure
- Low temperature(< 55℃) reduces the stress on components
- Use Water as lubricating medium instead of oil
- Without Oil Air Separation Unit
- Consumable parts are only air and water filter elements
- Ideal Speed (3000r/min)
- Ideal isothermal compression and no heat waste (<55℃)
- Most Advanced VSD and Two-stage compression technology
- Super dynamic balanced system and low vibration
- The motor and screw are directly connected without any gear
- Sound absorbing materials are also used in the shell
