Unleash unparalleled industrial prowess with the Large Power Oil-Lubricated Screw Compressor from China's premier supplier, Sanzhi (Henan) Compressor Co., Ltd. Benefit from factory-direct pricing on this cutting-edge Permanent Magnet Variable Frequency Two-Stage Screw Air Compressor, meticulously designed for exceptional energy savings and superior efficiency. Featuring top-tier High-Quality Centrifugal Fans, this stationary compressor establishes a new benchmark in reliability and performance, tailored for the most demanding applications. Embrace the advantage of advanced technology with Sanzhi's 185kw High Volume Two-Stage Screw Air Compressor for Industrial Use, ensuring remarkable durability and consistency in your operations.
Internal Structure Frontside
Internal Structure Backside
Working Principle
In an ideal air compression scenario, the power required for single-stage pressure transmission equals the cumulative power for multi-stage compression. However, in real-world operations, the power demand rises due to coupling transmission losses, bearing friction, and the cooling effects of liquid viscosity. To enhance efficiency, it's critical to minimize the compression ratio at each stage, ensuring that the overall power necessary for multi-stage compression remains lower than that of single-stage compression.
The two-stage screw air compressor features a dual rotary screw mechanism with both active and passive screws. Driven by an external transmission, the active screw drives the passive screw. The first stage includes a low-pressure screw group, while the second stage utilizes a high-pressure screw group. Each screw is surrounded by a sealing air film, which aids in compressing the gas through sequential suction, pressurization, and exhaust cycles during the screw rotation.
First Stage Compression: In this initial phase, the low-pressure screw group initiates the gas compression process. Gas enters the screw compression chamber through the suction valve, and the rapid rotation of the screw rotor compresses the gas further, transferring it to the second stage.
Second Stage Compression: At this stage, gas enters a tighter screw space and undergoes compression at higher temperatures and pressures. The exhaust valve then opens, releasing the high-pressure gas from the system.
Natural air is drawn into the first stage through an air filter, where it combines with a small amount of lubricating oil in the compression chamber. The gas is compressed to interstage pressure and cooled in the cooling channel by contact with oil mist, significantly lowering its temperature. The cooled gas then moves to the second-stage rotor for further compression to the final exhaust pressure. The entire process culminates as the compressor discharges the high-pressure gas through the exhaust valve.
| Sanzhi (Henan) Compressor Co,. Ltd. |
| Two-Stage Compression Permanent Magnet Variable Frequency Screw Air Compressor |
| Model |
Power |
Exhaust pressure |
Free air delivery* of unit at working pressure |
Voltage |
Frequency |
Air outlet discharge size |
Weight |
Dimensions |
| KW |
Mpa |
m³/min |
V |
Hz |
Inch |
Kg |
L*W*H(mm) |
| SZ15VF-II |
15 |
0.5 |
4.00 |
380 |
50 |
G1½ |
660 |
1450*780*1180 |
| 0.8 |
3.00 |
| 1.3 |
2.00 |
| SZ19VF-II |
18.5 |
0.5 |
5.00 |
380 |
50 |
G1½ |
680 |
1450*780*1180 |
| 0.8 |
4.00 |
| 1.3 |
3.80 |
| 1.6 |
2.20 |
| SZ22VF-II |
22 |
0.5 |
6.60 |
380 |
50 |
G1½ |
730 |
1650*880*1280 |
| 0.8 |
4.20 |
| 1.3 |
3.00 |
| 1.6 |
2.50 |
| SZ30VF-II |
30 |
0.5 |
7.00 |
380 |
50 |
G1½ |
980 |
2000*1260*1560 |
| 0.8 |
6.40 |
| 1.3 |
4.00 |
| 1.6 |
3.00 |
| SZ37VF-II |
37 |
0.5 |
10.00 |
380 |
50 |
G1½ |
1080 |
2000*1260*1560 |
| 0.8 |
7.00 |
| 1.3 |
5.50 |
| 1.6 |
4.00 |
| SZ45VF-II |
45 |
0.5 |
13.00 |
380 |
50 |
G2 |
1980 |
2000*1260*1560 |
| 0.8 |
10.00 |
| 1.3 |
6.50 |
| 1.6 |
5.00 |
| SZ55VF-II |
55 |
0.5 |
17.00 |
380 |
50 |
G2 |
2180 |
2150*1300*1730 |
| 0.8 |
12.00 |
| 1.3 |
8.60 |
| 1.6 |
5.00 |
| SZ75VF-II |
75 |
0.5 |
20.00 |
380 |
50 |
G2 |
2280 |
2150*1300*1730 |
| 0.8 |
16.50 |
| 1.3 |
11.00 |
| 1.6 |
9.00 |
| SZ90VF-II |
90 |
0.5 |
24.00 |
380 |
50 |
DN65 |
3200 |
2700*1920*1820 |
| 0.8 |
20.00 |
| 1.3 |
14.00 |
| 1.6 |
11.00 |
| SZ110VF-II |
110 |
0.5 |
28.00 |
380 |
50 |
DN65 |
3360 |
2700*1920*1820 |
| 0.8 |
24.50 |
| 1.3 |
18.00 |
| 1.6 |
14.00 |
| Due to product updates, the above parameters are subject to deviation in kind. |
Experience the unparalleled power and efficiency of our High Volume Centrifugal Fan Two-Stage Air Compressor! Utilizing a high-speed rotating impeller to precisely accelerate and decelerate the air, this advanced system ensures axial air entry for rapid cooling. Outperforming conventional air-cooled fans, our compressor supports continuous operations and significantly extends service life.
1) High Efficiency of PM Motor:Our cutting-edge permanent magnet motor offers a broader constant torque range and weak magnetic range, delivering a remarkable 20-30% higher efficiency than standard motors. It maintains exceptional performance even when deviating from the rated frequency.
2) Maintenance-Free Motor:Our permanent magnet motor is designed without internal bearings, eliminating maintenance and replacement costs associated with motor bearings.
3) Integrated Frequency Converter:Fitted with China's premier frequency system, our compressor boasts a wide and precise speed regulation range. It adjusts seamlessly to actual gas demand, offering extraordinary energy-saving capabilities.
4) Zero Transmission Loss:The embedded integrated shaft structure directly connects the permanent magnet motor and compressor, removing the need for couplings and other transmission parts, ensuring 100% transmission efficiency.
5) Variable Frequency Start and Soft Start:This feature significantly mitigates the impact on power grid equipment, safeguarding electrical systems from potential damage.
6) Reduced Energy Consumption:Our frequency conversion spans from 25% to 100%, unlike standard conversions from 50% to 100%. This allows for energy savings over 30% compared to fixed-speed air compressors and about 5% more than standard variable frequency compressors. Greater fluctuations in system gas consumption amplify these energy-saving effects.
7) Unique Two-Stage Compression Air End:Our uniquely designed air end integrates first-stage and second-stage compression rotors within a single case, each driven directly by gears. This design ensures optimal linear speed and elevates compression efficiency.
8) Innovative Internal Spray Curtain Cooling Method:Our high energy-saving internal spray curtain cooling method delivers exceptional cooling effect, significantly reducing the temperature of compressed air. It achieves near-isothermal compression, reduces interstage pressure loss, lowers compression ratios, and enhances overall compression efficiency.
9) Minimized Internal Leakage:By reducing the compression ratio for each stage, our two-stage compression method minimizes internal leakage from high-pressure to low-pressure ends, thereby enhancing volume efficiency.
10) Noise Reduction:The two-stage compression system effectively reduces the compression ratio, leading to significantly lower noise levels, particularly during unloading.
11) Easy Maintenance and Service:With a two-stage compressor unit, the similarities in systems and structures to single-stage compression make maintenance and user servicing straightforward and convenient, aside from the screw air end.
1. Exceptional Price Advantage
We offer direct ex-factory prices, ensuring our customers stay highly competitive in their markets. Enjoy unparalleled cost savings while maintaining superior quality, helping you to dominate your market.
2. Direct Transactions
Our products come straight from the factory, allowing us to provide more cost-effective solutions. By eliminating middlemen, we pass the savings directly to you, ensuring affordability without sacrificing quality.
3. Comprehensive OEM & ODM Services
With our robust production and management capabilities, we offer exceptional OEM and ODM services tailored to your needs. Partner with us to bring your vision to life with precision and excellence.
4. Personalized Customization
We welcome non-standard, export, and custom orders for voltage, power, pressure, etc. Contact us to discuss your specific requirements, and let us create a solution uniquely suited to your specifications.
5. Small Order Acceptance
Place a small trial order to experience the superior quality of our products firsthand. Discover why our clients trust SANZHI for consistent performance and reliability.
6. Rapid Delivery
Benefit from our high-quality products paired with timely and efficient delivery services. We ensure that you receive your orders promptly, keeping your operations running smoothly.
7. Full Authorization
For our distributors, we provide comprehensive authorization certificates, empowering you to market our SANZHI brand products with confidence. Leverage our brand's strength to boost your sales and credibility.
Sanzhi (Henan) Compressor Co., Ltd. stands as a beacon of excellence in the manufacturing industry, renowned for producing high-quality screw air compressors and vacuum pumps. With over a decade of relentless dedication, our diverse portfolio includes standard and low-pressure screw air compressors, cutting-edge permanent magnet frequency conversion models, two-stage compression units, laser cutting-specific compressors, and versatile mobile screw compressors. Available in single and double-tank variants, our offerings come in both electric and diesel versions, complemented by our innovative screw vacuum pumps.
Our production processes epitomize efficiency and modernity, showcasing state-of-the-art multi-air compressor assembly lines. Supported by a skilled team of over 50 employees, we continually enhance our ERP-driven management systems, significantly reducing lead times and ensuring the timely delivery of premium quality products.
Adhering to the highest standards, our factory proudly holds ISO9001 certification, a testament to our unwavering commitment to quality management. We rigorously enforce comprehensive quality control measures, ensuring each machine undergoes meticulous material inspections, production assessments, and thorough pre-delivery checks before it leaves our facility.
Our customer service ethos is unmatched. Our pre-sales team provides expert guidance to help you select the ideal air equipment, with extensive customization options available for appearance and configuration. We specialize in creating bespoke OEM products tailored to specific dealer requirements. Our after-sales team, composed of experienced professionals, guarantees swift and effective responses to all customer inquiries and needs.
At Sanzhi (Henan) Compressor Co., Ltd., we are dedicated to delivering high-performance, reliable products that foster enduring customer relationships. Our efficient delivery schedules, superior machines, and competitive pricing ensure you receive exceptional compressed air solutions every time.
Strategically located in Xinzheng City, Henan Province, China, our factory offers easy accessibility. We provide complimentary transportation from Xinzheng International Airport to our premises, a brief 30-kilometer journey that takes approximately one hour. We warmly welcome you to visit us!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a specialized manufacturer focusing on screw air compressors, with over a decade of professional experience.
Q2. How do you control quality?
A: 1. Strict inspection of raw materials.
2. Rigorous control of installation procedures.
3. Each machine undergoes a minimum of 5 hours of continuous testing before dispatch.
Q3. What information must I provide to get the suitable machine?
1. The required air delivery capacity (Unit: CFM or m³/Min).
2. The necessary working pressure (Unit: PSI, Bar, or Mpa).
3. The voltage and frequency of your location (V/Hz).
4. Any additional accessories needed, such as an air tank, filters, or air dryers.
Provide us with these details, and we will tailor a solution for you!
Q4. What is the general unit conversion?
1Bar = 0.1Mpa = 14.5PSI
1m³/min = 35.32cfm
1KW = 1.34HP
Q5. What is the available voltage for air compressors?
A: Sanzhi offers compressors in voltages of 380V/50Hz/3P, 400V/50Hz/3P, 415V/50Hz/3P, 220V/60Hz/3P, 440V/60Hz/3P, and can customize according to your requirements.
Q6. How long is the delivery time?
A: For standard voltage specifications, our lead time is typically 15 working days following order confirmation. For custom non-standard voltage requirements, please liaise with our sales team to receive precise delivery timelines tailored to your specific needs.
Q7. What's the payment term?
A: Our payment terms are designed to ensure a smooth transaction process: a 30% T/T deposit is required upfront, followed by 40% T/T prior to shipment, and the balance of 30% T/T upon receipt of the B/L copy. We are equipped to handle payments in both USD and RMB.
Q8. How about your warranty?
A: We provide a robust warranty program including a one-year warranty for the entire machine and an extended two-year warranty for the screw air compressor, excluding consumable spare parts.
Q9. What about the maintenance?
A: Initial maintenance is recommended after 500 operating hours. Subsequent maintenance should be performed every 2000-3000 hours, depending on specific working conditions to ensure optimal performance.
Q10. Can machines be run in high-temperature environment?
A: Absolutely, our machines are expertly engineered to deliver peak performance in high-temperature environments, with operational efficiency maintained within a temperature range of -20° to 45° (-4ºF to 113ºF).
Q11. Do you offer OEM service?
A: Yes, we offer comprehensive OEM and ODM services. Our skilled design team is dedicated to providing flexible solutions to meet your unique specifications.
Q12. How long could your air compressor be used?
A: Our air compressors are engineered for longevity, boasting a typical lifespan of over 10 years, ensuring long-term reliability.
Q13. Will you provide some spare parts for the machines?
A: Yes, we guarantee the availability of spare parts for all our machinery, ensuring you have the necessary components for maintenance and repairs.
Q14. How about your after-sales service?
A: We offer extensive after-sales service including online guidance for installation and commissioning. Additionally, we can dispatch engineers for on-site training and installation assistance to ensure seamless operation from day one.
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