KHW Series 100% Oil-Free High Pressure Piston Air Compressor | Kotech
The KHW Series is a heavy-duty, multi-stage reciprocating compressor designed for high-pressure applications (20-90 Bar) where zero oil contamination is mandatory. Ideal for pharmaceutical, food processing, electronics, and nitrogen gas boosting, it ensures the highest air purity and system reliability.
Provide your required pressure and gas flow. Our high-pressure engineering experts will match the optimal KHW model and treatment system for your facility.
- Working pressure range
- 20 - 90 Bar
- Air delivery coverage
- 0.9 - 35 m3/min
- Motor power scope
- 11 - 250 kW
- Oil-free purity certification
- Class 0
- Multistage compression efficiency
- 2-4 Stages
- Heavy-duty continuous runtime
- 24/7
- Precision Self-Lubricating Tech
- Self-Lubricating
- Maintenance-Free Compression
- Low Maintenance
Why KHW Series Sets the Standard for High-Pressure Purity
Designed for critical processes where even a drop of oil can cause system failure. The KHW series combines extreme 90-bar pressure capability with 100% dry compression technology.
Challenges in High-Pressure Clean Air Supply
- Oil mist contamination damaging sensitive medical or lab equipment.
- High maintenance costs of traditional lubricated high-pressure systems.
- Energy loss and overheating during multi-stage high-pressure boosting.
- Risk of production downtime due to frequent seal failures.
How Kotech KHW Eliminates Purity Risks
- Guarantees zero oil entry into the air stream via specialized dry-sump design.
- Reduces O&M costs by eliminating oil filters and complex lubrication monitoring.
- Optimizes thermal management with inter-stage cooling to save energy.
- Increases uptime with heavy-duty valves and Japanese-grade sealing components.
Where KHW Series Delivers Value
Trusted by engineers in specialized fields where high-pressure integrity and air purity are non-negotiable.
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
KHW Series Technical Specs: 20-90 Bar High-Pressure Oil-Free Models
Explore the complete technical specifications for Kotech KHW series high-pressure oil-free compressors. Compare air delivery (m³/min), discharge pressure, and motor power to find the ideal match for your industrial requirements. For customized high-pressure gas boosting solutions or integrated system design, contact our technical support team for a professional evaluation.
| 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 | 225015452075 |
| KHW-1.5/25 | 1.5 | 25 | 30 | 2600 | 225015452100 |
| KHW-1.8/25 | 1.8 | 25 | 30 | 2600 | 225015452100 |
| KHW-3/25 | 3 | 25 | 45 | 2600 | 225015452160 |
| KHW-6/30 | 6 | 30 | 75 | 4400 | 266525501945 |
| KHW-10/30 | 10 | 30 | 125 | 4400 | 266525501945 |
| KHW-3/40 | 3 | 40 | 37 | 4400 | 266525501945 |
| KHW-6/40 | 6 | 40 | 75 | 4400 | 266525501945 |
| KHW-8/40 | 8 | 40 | 95 | 4400 | 266525502000 |
| KHW-10/40 | 10 | 40 | 125 | 4400 | 266525502000 |
| KHW-12/40 | 12 | 40 | 160 | 6100 | 278026702000 |
| KHW-14/40 | 14 | 40 | 185 | 6200 | 278026702000 |
| KHW-16/40 | 16 | 40 | 200 | 6300 | 278026702000 |
| KHW-20/25 | 20 | 25 | 220 | 10500 | 400032092150 |
| KHW-25/25 | 25 | 25 | 250 | 10500 | 400032092150 |
| KHW-18/40 | 18 | 40 | 230 | 12000 | 342031002150 |
| KHW-20/40 | 20 | 40 | 250 | 12000 | 342031002150 |
| KHW-22/40 | 22 | 40 | 250 | 12000 | 342031002150 |
| KHW-25/40 | 25 | 40 | 280 | 12000 | 342031002150 |
| KHW-26/40 | 26 | 40 | 280 | 12000 | 342031002150 |
| KHW-30/40 | 30 | 40 | 315 | 14800 | 540031002400 |
| KHW-35/40 | 35 | 40 | 355 | 18000 | 560035502400 |
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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).
