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A 125 CFM 7 Bar Diesel Screw Air Compressor is a portable, diesel-engine-driven rotary screw air compressor designed to deliver a continuous air flow of 125 cubic feet per minute (approx. 3.5 m³/min) at a working pressure of 7 bar (101.5 psi) . It utilizes a twin-screw air end powered by a diesel engine (typically 26.8–41 kW), enabling independent operation in locations without electrical power . The unit is typically mounted on a wheeled chassis or trailer for easy mobility across job sites.
| Model | RKY-3.5/7 |
| Volume flow (m³/min) | 3.5 |
| Working pressure (Barg) | 7 |
| Fuel tank volume(L) | 45 |
| Maximum ambient temperature(℃) | 50 |
| Compression stage | 1 |
| Engine brand | YANGMA |
| Engine model | 3TNV88 |
| Engine power(KW) | 26.8 |
| Maximum engine speed(Rpm) | 3000 |
| Minimum engine speed(Rpm) | 1800 |
| Wheels Qty | 2 |
| Noise level(dB) | 75±3 |
| Overall weight (kg) | 880 |
| Dimensions(L*W*H)mm | 2853*1272*1092 |
| Air outlet (inch) | 2*G3/4 |
✅ Portable & Self-Powered
Powered by a rugged diesel engine, it operates completely independently of electrical grids—ideal for remote or off-grid locations . The wheeled/trailer design allows for easy towing and maneuverability on rough terrain .
✅ High Efficiency & Continuous Duty
Rotary screw technology delivers a pulsation-free, continuous air flow with high efficiency, outperforming reciprocating compressors in demanding environments . It is designed for long operating hours and heavy-duty use .
✅ Built to Survive Harsh Environments
Constructed with heavy-duty components and corrosion-resistant materials to withstand extreme weather, dust, and rugged job site conditions . Many models feature soundproof enclosures for quieter operation .
✅ Fuel-Efficient & Cost-Effective
Modern diesel engines are optimized for low fuel consumption (approx. 8.2 L/h), reducing operational costs . The compressor unit itself is engineered for minimal maintenance, with easy-access service points .
This compressor is widely used across industries requiring reliable, portable compressed air :
Construction & Mining: Powering jackhammers, rock drills, concrete breakers, and ventilation fans in remote pits .
Industrial & Road Repair: Operating pneumatic tools, sandblasting equipment, and for emergency infrastructure maintenance .
Oil & Gas Sector: Providing air for well drilling operations, pipeline purging, and powering tools at off-grid extraction sites .
Agriculture: Running crop sprayers, pneumatic seeders, and fertilizer distributors in fields without electricity .
General Manufacturing: Serving as a backup or mobile air source for factories during outages or in temporary workspaces .
Battery/Starter: Low battery, starter failure (common in cold regions).
Environmental factors: Failure to use the preheater in low temperatures.
A 125 CFM 7 Bar Diesel Screw Air Compressor is a portable, diesel-engine-driven rotary screw air compressor designed to deliver a continuous air flow of 125 cubic feet per minute (approx. 3.5 m³/min) at a working pressure of 7 bar (101.5 psi) . It utilizes a twin-screw air end powered by a diesel engine (typically 26.8–41 kW), enabling independent operation in locations without electrical power . The unit is typically mounted on a wheeled chassis or trailer for easy mobility across job sites.
| Model | RKY-3.5/7 |
| Volume flow (m³/min) | 3.5 |
| Working pressure (Barg) | 7 |
| Fuel tank volume(L) | 45 |
| Maximum ambient temperature(℃) | 50 |
| Compression stage | 1 |
| Engine brand | YANGMA |
| Engine model | 3TNV88 |
| Engine power(KW) | 26.8 |
| Maximum engine speed(Rpm) | 3000 |
| Minimum engine speed(Rpm) | 1800 |
| Wheels Qty | 2 |
| Noise level(dB) | 75±3 |
| Overall weight (kg) | 880 |
| Dimensions(L*W*H)mm | 2853*1272*1092 |
| Air outlet (inch) | 2*G3/4 |
✅ Portable & Self-Powered
Powered by a rugged diesel engine, it operates completely independently of electrical grids—ideal for remote or off-grid locations . The wheeled/trailer design allows for easy towing and maneuverability on rough terrain .
✅ High Efficiency & Continuous Duty
Rotary screw technology delivers a pulsation-free, continuous air flow with high efficiency, outperforming reciprocating compressors in demanding environments . It is designed for long operating hours and heavy-duty use .
✅ Built to Survive Harsh Environments
Constructed with heavy-duty components and corrosion-resistant materials to withstand extreme weather, dust, and rugged job site conditions . Many models feature soundproof enclosures for quieter operation .
✅ Fuel-Efficient & Cost-Effective
Modern diesel engines are optimized for low fuel consumption (approx. 8.2 L/h), reducing operational costs . The compressor unit itself is engineered for minimal maintenance, with easy-access service points .
This compressor is widely used across industries requiring reliable, portable compressed air :
Construction & Mining: Powering jackhammers, rock drills, concrete breakers, and ventilation fans in remote pits .
Industrial & Road Repair: Operating pneumatic tools, sandblasting equipment, and for emergency infrastructure maintenance .
Oil & Gas Sector: Providing air for well drilling operations, pipeline purging, and powering tools at off-grid extraction sites .
Agriculture: Running crop sprayers, pneumatic seeders, and fertilizer distributors in fields without electricity .
General Manufacturing: Serving as a backup or mobile air source for factories during outages or in temporary workspaces .
Battery/Starter: Low battery, starter failure (common in cold regions).
Environmental factors: Failure to use the preheater in low temperatures.
