Piston Water-cooled Air Compressor 4KW
- Working Pressure ：8 bar
- Power KW: 4 kW
- Volume of gas storage tank(L)：150
- Weight KG:235 kg
- Exhaust volume(L/min):520
- Motor(kw/HP):4/5.5
- Designed for environments where air-cooled compressors struggle, this water-cooled piston compressor delivers reliable performance in high-ambient-temperature conditions.
- The closed-loop water cooling system maintains optimal operating temperatures, preventing overheating and ensuring consistent air delivery even during extended continuous operation.
- Rugged cast iron construction and pressure lubrication provide years of trouble-free service in demanding applications like mining, chemical processing, and primary metal manufacturing. Available with customized cooling configurations to match your facility’s water system.
Product Parameters
Item | 7.5kw | 2.2kw | 1.5kw | 4kw | 11kw |
Model | 7.5kw | 2.2kw | 1.5kw | 4kw | 11kw |
Motor(kw/HP) | 7.5/10 | 2.2/3 | 7.5/10 | 4/5.5 | 11/15.5 |
Piston variable displacement(L/min) | 1517 | 300 | 200 | 823 | 2382 |
Exhaust volume(L/min) | 900 | 200 | 180 | 520 | 1500 |
Exhaust pressure(bar) | 8 | 12 | 8 | 8 | 30 |
Cylinder(diameter x piece) | 90×3 | 65×2/51×1 | 90×2/51×1 | 80×3 | 120×3 |
Stroke(mm) | 75 | 48 | 75 | 60 | 90 |
Rotate speed of air compressor(rpm) | 1060 | 940 | 850 | 910 | 780 |
Volume of gas storage tank(L) | 250 | 100 | 250 | 150 | 300 |
Overall dimension(L×W×H cm) | 165×51×117 | 111×43×85 | 164×57×117 | 130×52×108 | 162×70×132 |
Packing dimension(L×W×H cm) | 174×67×122 | 118×51×88 | 177×71×120 | 142×62×118 | 172×73×140 |
Net weight(kg) | 268 | 140 | 358 | 208 | 508 |
Gross weight(kg) | 306 | 174 | 410 | 235 | 548 |
Piston Water-cooled Air Compressor 4KW
How Water Cooling Improves Performance
Key Applications
- Foundries & Metal Casting: Withstand ambient temperatures over 50°C, eliminating heat-related downtime.
- Chemical Processing: Provide reliable 24/7 service for critical instrumentation, with 20+ year service lives and less maintenance in dusty environments.
- Glass Manufacturing: Handle high temperatures and particulates, extending valve life and reducing unplanned downtime.
- Mining: Perform in underground conditions (high humidity, dust, elevated temperatures) and integrate with mine dewatering systems, delivering 25+ year service lives.
Case Study: Automotive Engine Plant
Installation Considerations
- Remote Monitoring: Real-time status tracking and alarms for hard-to-access/hazardous locations.
- Special Materials: Epoxy-coated jackets, stainless steel connections, and special valves/seals for corrosive environments.
- Heat Recovery: Repurpose waste heat for boiler feed water, space heating, or process fluids.
Making the Right Choice
Choose water-cooled piston compressors if your operation involves ambient temperatures above 35°C, 24/7 operation, radiant heat, critical reliability needs, or existing cooling water infrastructure. Contact application engineers to discuss your requirements.
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Leading Air Compressor Manufacturer & Supplier in China
RUILINHG Air Compressor is one of China’s leading manufacturers of high-performance air compressors. We provide global customers with technologically advanced, environmentally friendly, and reliable products at highly competitive prices, while supporting customization to flexibly meet diverse requirements.
Our products feature a long service life, energy efficiency, and environmental protection. We continuously monitor the latest trends in the air compressor market and consistently update our product designs and core technologies to ensure that the air compressor solutions we provide meet customer needs.
About RUILING Air Compressor
Piston Water-cooled Air Compressor
Advantages
Reduced Carbon Buildup: Cooler valve operating temperatures minimize the carbon deposits that plague air-cooled compressors, maintaining efficiency and reducing the need for frequent valve cleaning. Simplified Maintenance Access: Despite their robust construction, water-cooled compressors are designed with maintenance in mind – easy-access valve covers, strategically placed drain ports, and serviceable cooling passages.
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Office: Lanshan District, Linyi City, Shandong Province, China
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Our self-manufacturing model endows our air compressors with distinct cost advantages, while our advanced technologies enable our products to stand out in the fierce market competition.
