Unlock unprecedented industrial power with the formidable Large Power Oil-Lubricated Screw-Compressor, brought to you by China's leading supplier, Sanzhi (Henan) Compressor Co., Ltd. Take advantage of exclusive factory-direct pricing on this state-of-the-art Permanent Magnet Variable Frequency Two-Stage Screw Air Compressor, crafted with precision for outstanding energy efficiency and remarkable performance. Equipped with premium High-Quality Centrifugal Fans, this stationary compressor sets a new standard in reliability, engineered for the most demanding applications.
Internal Structure Frontside
Internal Structure Backside
Working Principle
In an optimal air compression scenario, the power demand for single-stage pressure transmission matches the cumulative power required for multi-stage compression. However, in real-world applications, power demand increases due to coupling transmission losses, bearing friction, and the cooling effects caused by liquid viscosity. To maximize efficiency, it is essential to minimize the compression ratio at each stage, ensuring that the overall power requirement for multi-stage compression is less than that of single-stage compression.
The two-stage screw air compressor features a sophisticated dual rotary screw mechanism, including both active and passive screws. The active screw, driven by an external transmission system, propels the passive screw. The initial stage uses a low-pressure screw group, while the subsequent stage employs a high-pressure screw group. Each screw is surrounded by a sealing air film, promoting gas compression through a continuous cycle of suction, pressurization, and exhaust as the screws rotate.
First Stage Compression: At this initial stage, the low-pressure screw group starts the compression process. Gas is drawn into the screw compression chamber through the suction valve, and the rapid rotation of the screw rotor compresses the gas, transferring it to the next stage.
Second Stage Compression: In the second stage, the gas enters a more confined screw space, where it is compressed under higher temperatures and pressures. The exhaust valve then opens, releasing the highly pressurized gas from the system.
Natural air is taken into the first stage via an air filter, where it blends with a small quantity of lubricating oil in the compression chamber. The gas is compressed to an intermediate pressure and cooled in the cooling channel through oil mist contact, significantly reducing its temperature. This cooled gas then moves into the second-stage rotor for further compression to the final exhaust pressure. The process concludes 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 might of our High Volume Centrifugal Fan Two-Stage Air Compressor! Ingeniously designed with a high-speed rotating impeller, it accelerates and decelerates air with utmost precision, ensuring seamless axial entry for rapid cooling. This advanced cooling mechanism surpasses typical air-cooled systems, enabling continuous operation and significantly prolonging the compressor's service life.
1) Exceptional Efficiency of PM Motor:Our cutting-edge permanent magnet motor boasts a broader constant torque range and an extensive weak magnetic range, delivering an impressive 20-30% higher efficiency than standard motors. Even when deviating from the rated frequency, it maintains outstanding motor efficiency.
2) Maintenance-Free Operation:Featuring no internal bearings, our permanent magnet motor eliminates the costs associated with motor bearing maintenance and replacement, ensuring hassle-free operation.
3) Integrated High-Precision Frequency Converter:Equipped with China's premier frequency system, our compressor offers an expansive speed regulation range with impeccable precision. It adapts seamlessly to your actual gas demand, delivering superior energy-saving performance.
4) Absolute Zero Transmission Loss:The permanent magnet motor and compressor utilize an innovative embedded integrated shaft directly connected structure. This design eliminates couplings and other transmission parts, ensuring 100% transmission efficiency.
5) Variable Frequency and Soft Start:This advanced feature significantly reduces impact on power grid equipment and safeguards electrical systems from potential damage.
6) Drastically Reduced Energy Consumption:Our frequency conversion ranges from 25% to 100%, compared to the typical 50% to 100% range. This results in energy savings exceeding 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 Architecture:Our two-stage compression screw machine features a uniquely designed air end that integrates first-stage and second-stage compression rotors within a single casing. Driven directly by gears, each rotor achieves optimal linear speed and superior compression efficiency.
8) Revolutionary Internal Spray Curtain Cooling Method:Our high energy-saving internal spray curtain cooling method ensures exceptional 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 Leakages:Our two-stage compression design lowers the compression ratio for each stage, minimizing internal leakage from high-pressure to low-pressure ends and significantly boosting volume efficiency.
10) Superior Noise Reduction:The two-stage compression system effectively reduces the compression ratio, significantly lowering noise levels, particularly during unloading operations.
11) Effortless Maintenance and Service:With our two-stage compressor unit, apart from the screw air end, other systems and structures remain similar to those in single-stage compression. This design philosophy ensures maintenance and user servicing are straightforward and highly 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 industry leader renowned for over a decade, specializes in crafting exceptional screw air compressors and vacuum pumps. Our comprehensive product line includes standard and low-pressure screw air compressors, cutting-edge permanent magnet frequency conversion models, dual-stage compression units, specialized laser cutting compressors, and versatile mobile screw compressors available in single and double-tank variants, both in electric and diesel configurations. Moreover, we innovate with advanced screw vacuum pumps.
Our production processes epitomize modern efficiency, featuring advanced multi-air compressor assembly lines. With a dedicated team of over 50 skilled professionals, we continuously enhance our ERP-based management systems, thereby significantly reducing lead times and ensuring the timely delivery of superior quality products.
Committed to stringent standards, our factory proudly holds ISO9001 certification, reflecting our dedication to quality management. We enforce rigorous quality control measures, ensuring every machine undergoes comprehensive material inspections, precise production evaluations, and thorough pre-delivery checks before leaving our facility.
Our customer service philosophy is unmatched, featuring a pre-sales team that provides expert guidance to help you select the ideal air equipment, along with extensive customization options for appearance and configuration. We excel in developing bespoke OEM products tailored to specific dealer needs. Our after-sales team, consisting of seasoned professionals, ensures prompt and effective responses to all customer inquiries and requirements.
At Sanzhi (Henan) Compressor Co., Ltd, we are dedicated to delivering high-performance, reliable products that cultivate enduring customer relationships. Our efficient delivery schedules, superior machines, and competitive pricing guarantee that 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 specialized manufacturer focusing on screw air compressors, with over a decade of professional experience.
Q2. How do you control quality?
A: 1. Stringent 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. If you require custom non-standard voltage specifications, please consult our dedicated sales team to receive specific delivery timelines and customized solutions.
Q7. What's the payment term?
A: Our payment terms are structured to provide flexibility and convenience. We require an initial 30% T/T deposit in advance, followed by 40% T/T before shipment, and the final 30% T/T upon receipt of the B/L copy. We accept payments in both USD and RMB, accommodating a wide range of financial preferences.
Q8. How about your warranty?
A: We offer a comprehensive warranty package: one year for the entire machine and an extended two-year warranty for the screw air compressor, excluding consumable spare parts. This ensures long-term reliability and peace of mind.
Q9. What about the maintenance?
A: The initial maintenance should be performed after 500 operating hours to ensure optimal performance. Subsequent maintenance intervals range between 2000-3000 hours, tailored to specific working conditions and operational demands, to maintain efficiency.
Q10. Can machines be run in high-temperature environment?
A: Absolutely, our machines are meticulously engineered to perform efficiently even in high-temperature environments, with an operational temperature range from -20° to 45° (-4ºF to 113ºF). This makes them versatile for varying climatic conditions.
Q11. Do you offer OEM service?
A: Yes, we are proud to offer both OEM and ODM services. Our professional design team is highly skilled in delivering tailored solutions to meet your specific requirements, ensuring maximum flexibility and customer satisfaction.
Q12. How long could your air compressor be used?
A: Built for exceptional durability, our air compressors boast a typical lifespan exceeding 10 years, ensuring long-term performance and reliability.
Q13. Will you provide some spare parts for the machines?
A: Yes, we guarantee the availability of spare parts for all our machines, ensuring you have the necessary components for maintenance and repairs.
Q14. How about your after-sales service?
A: We provide comprehensive after-sales support, including online guidance for installation and commissioning. Additionally, we can dispatch expert engineers for on-site training and installation assistance, ensuring seamless operation and integration.
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