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. Engineered for those who seek to optimize their workflow, this compressor provides consistent, robust output, ensuring that your operations run smoothly and efficiently, no matter the challenge. With Sanzhi's commitment to excellence, you invest not only in a product but in a legacy of innovation and trust.
Internal Structure Frontside
Internal Structure Backside
Working Principle
In an optimal air compression scenario, the power required for single-stage pressure transmission matches the cumulative power for multi-stage compression. However, real-world operations face increased power demand due to coupling transmission losses, bearing friction, and the cooling effects of liquid viscosity. To achieve peak efficiency, it is crucial to minimize each stage's compression ratio, ensuring the overall power demand for multi-stage compression remains below that of single-stage compression.
The two-stage screw air compressor features a sophisticated dual rotary screw mechanism, with both active and passive screws. Driven by an external transmission, the active screw propels the passive screw in unison. The first stage incorporates a low-pressure screw group, while the second stage employs a high-pressure screw group. Each screw is enveloped by a sealing air film, enabling efficient gas compression through a sequence of suction, pressurization, and exhaust cycles as the screws rotate.
First Stage Compression: In this initial phase, the low-pressure screw group commences gas compression. Gas is drawn into the screw compression chamber via the suction valve, and the high-speed rotation of the screw rotor intensifies compression, transferring the gas to the second stage.
Second Stage Compression: During the second stage, gas enters a more confined screw space, where compression occurs at increased temperatures and pressures. The exhaust valve then opens, releasing high-pressure gases from the system.
Natural air is drawn into the first stage through an air filter, where it mixes 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 oil mist contact, significantly reducing its temperature. The cooled gas then proceeds to the second-stage rotor for further compression to the final exhaust pressure. This entire process culminates as the compressor discharges 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 of our High Volume Centrifugal Fan Two-Stage Air Compressor! Utilizing a high-speed rotating impeller, it precisely accelerates and decelerates air for optimal axial entry, ensuring rapid and efficient cooling. This advanced cooling mechanism surpasses conventional air-cooled fans, promoting continuous operation and substantially extending the compressor's lifespan.
1) High Efficiency of PM Motor:Our cutting-edge permanent magnet motor features a broader constant torque range and weak magnetic range, delivering 20-30% higher efficiency compared to standard motors. It maintains exceptional efficiency even outside the rated frequency.
2) Maintenance-Free Motor:Our permanent magnet motor, devoid of internal bearings, eliminates the costs associated with motor bearing maintenance and replacement.
3) Integrated Frequency Converter:Featuring China's leading frequency system, our compressor offers a wide speed regulation range with high precision. It adapts seamlessly to your actual gas demand, ensuring superior energy-saving performance.
4) Zero Transmission Loss:Our permanent magnet motor and compressor utilize an embedded integrated shaft directly connected structure, eliminating couplings and other transmission parts for 100% transmission efficiency.
5) Variable Frequency Start and Soft Start:This feature significantly reduces the impact on power grid equipment and protects electrical systems from potential damage.
6) Reduced Energy Consumption:Our frequency conversion ranges from 25% to 100%, unlike typical conversions which range from 50% to 100%. This leads to energy savings of over 30% compared to fixed-speed air compressors and approximately 5% more than standard variable frequency compressors. The greater the fluctuation in system gas consumption, the more pronounced the energy-saving effect.
7) Unique Two-Stage Compression Air End:Our two-stage compression screw machine features an innovative air end design that integrates first-stage and second-stage compression rotors within a single case. Driven directly by gears, each rotor achieves optimal linear speed, resulting in higher compression efficiency.
8) Innovative Internal Spray Curtain Cooling Method:The high energy-saving internal spray curtain cooling method ensures superior cooling effects, significantly lowering the temperature of compressed air. It achieves near-isothermal compression, reduces pressure loss between stages, lowers the compression ratio, and enhances overall compression efficiency.
9) Minimized Internal Leakage:Our two-stage compression design reduces the compression ratio for each stage, minimizing internal leakage from high-pressure to low-pressure ends, thereby boosting volume efficiency.
10) Noise Reduction:The two-stage compression system lowers the compression ratio, significantly reducing noise levels, especially during unloading.
11) Easy Maintenance and Service:With a two-stage compressor unit, apart from the screw air end, other systems and structures remain similar to those in single-stage compression, ensuring maintenance and user servicing are straightforward and convenient.
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, a distinguished leader in the manufacturing industry, excels in producing top-tier screw air compressors and vacuum pumps. With over a decade of unwavering commitment, we offer an extensive range of products, including standard and low-pressure screw air compressors, cutting-edge permanent magnet frequency conversion models, two-stage compression units, specialized compressors for laser cutting, and versatile mobile screw compressors in single and double-tank configurations, available in electric and diesel options, alongside innovative screw vacuum pumps.
Our production processes epitomize efficiency and modernity, featuring state-of-the-art multi-air compressor assembly lines. With a skilled team of over 50 employees, we continuously refine our ERP-based management systems, significantly reducing lead times and ensuring the prompt delivery of superior quality products.
Adhering to rigorous standards, our factory proudly holds ISO9001 certification, highlighting our dedication to quality management. We meticulously enforce stringent quality control measures, ensuring each machine undergoes comprehensive material inspections, production evaluations, and thorough pre-delivery checks before leaving our facility.
Our unparalleled customer service ethos includes a pre-sales team providing expert advice to help you select the ideal air equipment, backed by extensive customization options for appearance and configuration. We excel in creating bespoke OEM products tailored to specific dealer requirements. Our after-sales team, comprised of seasoned professionals, ensures rapid 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 lasting customer relationships. Our efficient delivery schedules, top-notch machines, and competitive pricing ensure you receive exceptional compressed air solutions every time.
Conveniently located in Xinzheng City, Henan Province, China, our factory is easily accessible. We offer complimentary transportation from Xinzheng International Airport to our premises, a brief 30-kilometer journey that takes approximately one hour. We warmly welcome your visit!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a dedicated manufacturer specializing in 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 air compressor?
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 from order confirmation. For custom non-standard voltage requirements, please consult our sales team for specific delivery timelines. We prioritize timely delivery to ensure your operations run smoothly.
Q7. What are the payment terms?
A: Our payment terms are structured for your convenience: an initial 30% T/T deposit in advance, followed by 40% T/T before shipment, and the remaining 30% T/T upon receipt of the B/L copy. We accommodate payments in both USD and RMB.
Q8. What is your warranty policy?
A: We offer a comprehensive warranty of one year for the entire machine and two years for the screw air compressor, excluding consumable spare parts. Our warranty ensures your peace of mind and protects your investment.
Q9. What about maintenance requirements?
A: The initial maintenance check should be performed after 500 operating hours to ensure optimal performance. Subsequent maintenance intervals range between 2000-3000 hours, adjusted to specific working conditions for enhanced machine longevity.
Q10. Can the machines operate in high-temperature environments?
A: Absolutely, our machines are engineered for efficiency even in high-temperature environments, with an operational temperature range from -20° to 45° (-4ºF to 113ºF). This flexibility ensures reliability under various climatic conditions.
Q11. Do you offer OEM services?
A: Yes, we provide both OEM and ODM services. Our expert design team is dedicated to delivering flexibility to meet your specific requirements, ensuring a perfect fit for your needs.
Q12. What is the lifespan of your air compressors?
A: Our air compressors are engineered for durability and reliability, with a typical lifespan exceeding 10 years. This ensures long-term performance and value for your investment.
Q13. Do you provide spare parts for the machines?
A: Yes, we guarantee the availability of spare parts for all our machines, ensuring you can maintain peak performance over the machine's lifespan.
Q14. What kind of after-sales service do you offer?
A: We offer extensive after-sales support, including online guidance for installation and commissioning. Additionally, we can dispatch experienced engineers for on-site training and installation assistance, ensuring seamless integration and operation.
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