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.
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, real-world operations face increased power demand due to coupling transmission losses, bearing friction, and the cooling effects of liquid viscosity. To optimize efficiency, it is crucial to reduce each stage's compression ratio, ensuring that the total power required for multi-stage compression remains lower than that of single-stage compression.
The two-stage screw air compressor boasts a dual rotary screw mechanism, featuring both active and passive screws. Driven by an external transmission, the active screw propels the passive screw. The first stage incorporates a low-pressure screw group, while the second stage utilizes a high-pressure screw group. Each screw is enveloped by a sealing air film, facilitating gas compression through a sequence of suction, pressurization, and exhaust cycles as the screws rotate.
First Stage Compression: In this initial stage, the low-pressure screw group begins compressing the gas. Gas enters the screw compression chamber via the suction valve, and the high-speed rotation of the screw rotor further compresses the gas, transferring it to the second stage.
Second Stage Compression: During the second stage, gas enters a more confined screw space, undergoing compression at elevated temperatures and pressures. The exhaust valve subsequently opens, releasing the 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 enters 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 of our High Volume Centrifugal Fan Two-Stage Air Compressor! A high-speed rotating impeller accelerates and decelerates the air with precision, ensuring it enters axially for rapid cooling. This efficient cooling mechanism outperforms typical air-cooled fans, enabling continuous operation and significantly extending the compressor's service life.
1) High Efficiency of PM Motor:Our state-of-the-art permanent magnet motor boasts a wider constant torque range and weak magnetic range, delivering 20-30% higher efficiency compared to standard motors. Even when straying from the rated frequency, it maintains exceptional motor efficiency.
2) Maintenance-Free Motor:With no internal bearings, our permanent magnet motor eradicates the costs associated with motor bearing maintenance and replacement.
3) Integrated Frequency Converter:Equipped with China's leading frequency system, our compressor offers a broad speed regulation range with high precision. It adapts to your actual gas demand, providing superior energy-saving performance.
4) Zero Transmission Loss:The 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 prevents damage to electrical systems.
6) Reduced Energy Consumption:Our frequency conversion ranges from 25% to 100%, unlike ordinary conversions which range from 50% to 100%. This results in energy savings of over 30% compared to fixed-speed air compressors, and approximately 5% more than standard variable frequency compressors. The more significant the fluctuation in system gas consumption, the more noticeable the energy-saving effect.
7) Unique Two-Stage Compression Air End:Our two-stage compression screw machine features a uniquely designed air end that combines first-stage and second-stage compression rotors within a single case. Driven directly by gears, each rotor achieves optimal linear speed and higher compression efficiency.
8) Innovative Internal Spray Curtain Cooling Method:This high energy-saving internal spray curtain cooling method ensures superior cooling effects, significantly reducing the temperature of compressed air. It achieves near-isothermal compression, reduces pressure loss between stages, lowers the compression ratio, and enhances compression efficiency.
9) Minimized Internal Leakage:Our two-stage compression approach lowers the compression ratio for each stage, minimizing internal leakage from high-pressure to low-pressure ends and boosting volume efficiency.
10) Noise Reduction:The two-stage compression system reduces the compression ratio, significantly lowering noise levels, especially unloading noise.
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, making maintenance and user servicing 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, an established powerhouse in the manufacturing realm, excels in crafting superior screw air compressors and vacuum pumps, with over ten years of unwavering dedication. Our extensive range includes normal and low-pressure screw air compressors, advanced permanent magnet frequency conversion models, two-stage compression units, specialized compressors for laser cutting, and versatile mobile screw compressors available in single and double-tank configurations, both electric and diesel options, and innovative screw vacuum pumps.
Our production processes are a testament to efficiency and modernity, featuring state-of-the-art multi-air compressor assembly lines. With a team of over 50 proficient employees, we continually refine our ERP-based management systems, significantly reducing lead times and guaranteeing the prompt delivery of superior quality products.
Adhering to rigorous standards, our factory proudly holds ISO9001 certification, underscoring our commitment 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 it leaves our facility.
Our customer service ethos is unparalleled, with a pre-sales team offering expert advice to help you choose the perfect air equipment, backed by extensive customization options for appearance and configuration. We also excel in creating bespoke OEM products tailored to specific dealer requirements. Our after-sales team, comprised of seasoned professionals, guarantees rapid and effective responses to all customer inquiries and needs.
At Sanzhi (Henan) Compressor Co., Ltd, we are committed to delivering high-performance, reliable products that foster lasting customer relationships. Our efficient delivery schedules, top-notch machines, and competitive pricing ensure you receive outstanding 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, boasting 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 after order confirmation. For custom non-standard voltage requirements, please consult our sales team for specific delivery timelines.
Q7. What's the payment term?
A: Our payment terms are structured as follows: 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 accept payments in both USD and RMB.
Q8. How about your warranty?
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.
Q9. What about the maintenance?
A: The initial maintenance should be performed after 500 operating hours. Subsequent maintenance intervals range between 2000-3000 hours, tailored to specific working conditions.
Q10. Can machines be run in high-temperature environment?
A: Absolutely, our machines are engineered to perform efficiently in high-temperature environments, with an operational temperature range from -20° to 45° (-4ºF to 113ºF).
Q11. Do you offer OEM service?
A: Yes, we provide both OEM and ODM services. Our professional design team ensures flexibility to meet your specific requirements.
Q12. How long could your air compressor be used?
A: Our air compressors are built for durability, with a typical lifespan exceeding 10 years.
Q13. Will you provide some spare parts for the machines?
A: Yes, we ensure the availability of spare parts for all our machines.
Q14. How about your after-sales service?
A: We offer comprehensive after-sales support including online guidance for installation and commissioning. Furthermore, we can dispatch engineers for on-site training and installation assistance.
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