KHW Series High Pressure Oil Free Piston Air Compressor | 25 to 90 Bar
The KHW Series high pressure oil free piston air compressor adopts opposed balanced structure and water cooling system. It supports working pressure from 25bar up to 90bar, airflow 0.9–35m³/min, power 18.5–355kW. Suited for heavy-duty industrial processes requiring pure oil-free compressed air.
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Functional Configuration
- Water Cooling System
- 100% oil-free compression
- Opposed Balanced Structure
- Low vibration, no special foundation
- Four-stage Compression
- Minimized leakage & component wear
- Three-stage Flow Regulation
- Significant energy consumption reduction
- VFD Control + Harmonic Filter
- Stable operation & energy saving
- Skid-mounted Integrated Design
- Quick installation & convenient movement
- Multi-point Real-time Monitoring
- Auto water cooling adjustment
- Imported Custom Core Parts
- Long service life & reliability
Performance Parameters
- Working Pressure
- 25/30/40/90 bar (363/435/580/1305 psi)
- Air Delivery
- 0.9–35 m³/min (32–1236 cfm)
- Power
- 18.5–355 kW (25–476 hp)
Why KHW Series Sets the Standard for High-Pressure Purity
Challenges in High-Pressure Oil-Free Air Supply
- Oil contamination risk affecting sensitive industrial production
- High vibration requires costly anti-vibration foundation construction
- Excessive energy consumption in continuous high-pressure compression
- Short service life and frequent replacement of core wearing parts
- Complicated installation and time-consuming site deployment
- Unstable performance in extreme high/low temperature or high altitude sites
How Kotech KHW Solves High-Pressure Compression Challenges
- 100% oil-free water cooling design eliminates oil contamination risk
- Opposed balanced structure greatly reduces vibration, no special foundation needed
- Four-stage compression + VFD control cuts energy use up to 60%
- Custom imported valve & piston ring components support 8000h continuous running
- Skid-mounted integrated design simplifies transport and quick field installation
- Robust structure maintains stable performance under extreme working conditions
Where KHW Series Delivers Value
High pressure piston air compressor Advantages:
1. High reliability, longer life and lower energy consumption.
2. Water cooling, 100% oil free design.
3. Advanced opposed balanced structure, no vibration during operation, no need for shockproof and special foundation.
4. Four-stage compression and double-acting cylinder design minimize leakage and wear, thus reducing energy consumption and extending service life.
5. Three-stage flow regulation control greatly reduces energy consumption.
6. Unique mute design, lower running noise.
7. Anti-corrosion and durable, multi-point monitoring, automatic adjustment of the water cooling system to ensure that the piston head is always stable in good condition.
8. The key components such as air valve, filler, piston ring and guide ring are all imported and customized to ensure the continuous operation of the unit for 8000 hours.
9. Perfect matching of frequency conversion control and harmonic filtering protection can ensure the smooth operation of the unit and achieve up to 60% energy saving effect.
10. Integrated skid-mounted design, easy to move and install.
11. It can operate reliably and efficiently under special conditions such as high altitude, high temperature, high humidity, low temperature and cold environment.
Air Compressor Station Flow Chart
Frequently Asked Questions
The KHW series features a specialized design where the compression chamber is completely separated from the lubrication system. We use self-lubricating material piston rings and high-grade seals, ensuring that no oil ever enters the compression process, meeting the strictest air purity standards for food, medical, and electronics industries.
The KHW series is designed for high-pressure applications, offering a working pressure range from 20 Bar up to 90 Bar. This makes it an ideal solution for specialized industrial processes like high-pressure leakage testing, PET blowing, and nitrogen boosting.
Our multistage compression technology (2 to 4 stages depending on the model) ensures a lower compression ratio for each stage. This results in lower discharge temperatures, reduced mechanical stress, and significantly higher energy efficiency compared to single-stage high-pressure units.
Yes. The KHW series is built with a heavy-duty design, featuring high-efficiency cooling systems and low-speed operation. The use of premium components like Swedish stainless steel valves ensures the unit remains stable and reliable even during long-term, non-stop industrial production.
Compared to oil-lubricated units, the KHW series simplifies maintenance by eliminating the need for oil changes in the compression stages and oil filter replacements. The primary maintenance involves periodic checks of the suction filters and piston rings. Our high-wear-resistant materials ensure exceptionally long service intervals.
Absolutely. Kotech provides customized solutions including VSD (Variable Speed Drive) control, integrated air treatment systems (dryers/filters), and specialized coatings for corrosive environments. We can also adapt the system for nitrogen or other inert gas compression.
We optimize the energy-to-air ratio through our patented valve designs and precision-balanced moving parts. By reducing internal friction and heat buildup, the KHW series delivers more compressed air per kilowatt-hour, helping you reduce the overall Total Cost of Ownership (TCO).
KHW Series Technical Specs: 20-90 Bar High-Pressure Oil-Free Models
| Model | Air Delivery(m3/min) | Working Pressure(Bar) | Motor Power(Kw) | Weight(Kg) | Dimension (LWH)(mm) |
|---|---|---|---|---|---|
| KHW-0.9/25 | 0.9 | 25 | 18.5 | 2000 | 2250*1545*2075 |
| KHW-1.5/25 | 1.5 | 25 | 30 | 2600 | 2250*1545*2100 |
| KHW-1.8/25 | 1.8 | 25 | 30 | 2600 | 2250*1545*2100 |
| KHW-3/25 | 3 | 25 | 45 | 2600 | 2250*1545*2160 |
| KHW-6/30 | 6 | 30 | 75 | 4400 | 2665*2550*1945 |
| KHW-10/30 | 10 | 30 | 125 | 4400 | 2665*2550*1945 |
| KHW-3/40 | 3 | 40 | 37 | 4400 | 2665*2550*1945 |
| KHW-6/40 | 6 | 40 | 75 | 4400 | 2665*2550*1945 |
| KHW-8/40 | 8 | 40 | 95 | 4400 | 2665*2550*2000 |
| KHW-10/40 | 10 | 40 | 125 | 4400 | 2665*2550*2000 |
| KHW-12/40 | 12 | 40 | 160 | 6100 | 2780*2670*2000 |
| KHW-14/40 | 14 | 40 | 185 | 6200 | 2780*2670*2000 |
| KHW-16/40 | 16 | 40 | 200 | 6300 | 2780*2670*2000 |
| KHW-20/25 | 20 | 25 | 220 | 10500 | 4000*3209*2150 |
| KHW-25/25 | 25 | 25 | 250 | 10500 | 4000*3209*2150 |
| KHW-18/40 | 18 | 40 | 230 | 12000 | 3420*3100*2150 |
| KHW-20/40 | 20 | 40 | 250 | 12000 | 3420*3100*2150 |
| KHW-22/40 | 22 | 40 | 250 | 12000 | 3420*3100*2150 |
| KHW-25/40 | 25 | 40 | 280 | 12000 | 3420*3100*2150 |
| KHW-26/40 | 26 | 40 | 280 | 12000 | 3420*3100*2150 |
| KHW-30/40 | 30 | 40 | 315 | 14800 | 5400*3100*2400 |
| KHW-35/40 | 35 | 40 | 355 | 18000 | 5600*3550*2400 |
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Frequently Asked Questions
The KHW series features a specialized design where the compression chamber is completely separated from the lubrication system. We use self-lubricating material piston rings and high-grade seals, ensuring that no oil ever enters the compression process, meeting the strictest air purity standards for food, medical, and electronics industries.
The KHW series is designed for high-pressure applications, offering a working pressure range from 20 Bar up to 90 Bar. This makes it an ideal solution for specialized industrial processes like high-pressure leakage testing, PET blowing, and nitrogen boosting.
Our multistage compression technology (2 to 4 stages depending on the model) ensures a lower compression ratio for each stage. This results in lower discharge temperatures, reduced mechanical stress, and significantly higher energy efficiency compared to single-stage high-pressure units.
Yes. The KHW series is built with a heavy-duty design, featuring high-efficiency cooling systems and low-speed operation. The use of premium components like Swedish stainless steel valves ensures the unit remains stable and reliable even during long-term, non-stop industrial production.
Compared to oil-lubricated units, the KHW series simplifies maintenance by eliminating the need for oil changes in the compression stages and oil filter replacements. The primary maintenance involves periodic checks of the suction filters and piston rings. Our high-wear-resistant materials ensure exceptionally long service intervals.
Absolutely. Kotech provides customized solutions including VSD (Variable Speed Drive) control, integrated air treatment systems (dryers/filters), and specialized coatings for corrosive environments. We can also adapt the system for nitrogen or other inert gas compression.
We optimize the energy-to-air ratio through our patented valve designs and precision-balanced moving parts. By reducing internal friction and heat buildup, the KHW series delivers more compressed air per kilowatt-hour, helping you reduce the overall Total Cost of Ownership (TCO).
