Internal Structure Frontside
Internal Structure Backside
Working Principle
In the ideal scenario of air compression, the energy required for single-stage pressure transmission equates to the cumulative energy needed for multi-stage compression. In reality, due to factors such as coupling transmission losses, bearing friction, and the viscosity's cooling effect, the actual operational power increases. By minimizing the compression ratio at each stage, we can lower the overall power consumption in multi-stage compression, making it more efficient than single-stage compression.
The two-stage screw air compressor from Sanzhi (Henan) Compressor Co., Ltd. features an innovative dual-stage rotary screw system, ensuring optimal performance and energy efficiency. Each stage of the compressor comprises an active and a passive screw, driven by an external power mechanism. The initial stage uses a low-pressure rate screw group, while the second stage is designed with a high-pressure rate screw group. Surrounding each screw is a sealing air film that enhances sealing efficiency. As the screws rotate, the air undergoes three fundamental processes: suction, pressurization, and exhaust, delivering superior compression.
First Stage Compression: The initial stage of the Powerful 132kw Two-Stage Screw Air Compressor employs a low-pressure rate screw group to compress the gas. The gas is drawn into the compression chamber via the suction valve. With the high-speed rotation of the screw rotor, the gas is gradually compressed and transferred to the subsequent stage for further processing.
Second Stage Compression: In this crucial stage, the gas enters a more confined screw space, subjected to higher temperatures and pressures. The exhaust valve then efficiently expels the high-pressure gases from the system, completing the compression process.
Natural air is drawn into the first compression stage through a high-efficiency air filter, where it mixes with a small quantity of lubricating oil for smoother operation. This mixture is compressed to an optimal interstage pressure. The compressed gas then travels through a cooling channel, encountering significant oil mist that significantly reduces its temperature. This cooled gas is then directed into the second-stage rotor for further compression, achieving the final exhaust pressure. The compressor system efficiently expels the gas through the exhaust valve, completing the entire, highly efficient compression cycle.
| 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. |
1) Unparalleled Efficiency of PM Motor:The constant torque and weak magnetic ranges are significantly broader, presenting a remarkable 20-30% increase in efficiency over traditional motors. Even when operating away from the rated frequency, the permanent magnet motor retains its superior efficiency, guaranteeing outstanding performance consistently.
2) Maintenance-Free Motor:Our state-of-the-art permanent magnet motor is engineered without bearings, thereby eliminating the need for expensive bearing maintenance and replacement, providing a truly maintenance-free experience.
3) Advanced Integrated Frequency Converter:Equipped with China's premier frequency system, this unit boasts extensive speed regulation and unparalleled precision. It seamlessly adapts to actual gas demands, delivering exceptional energy-saving results.
4) Zero Transmission Loss:The permanent magnet motor and compressor feature a compact, integrated shaft connection. This direct drive configuration eradicates couplings and other transmission components, ensuring 100% transmission efficiency.
5) Variable and Soft Start MechanismsThe variable frequency start and soft start functions minimize impact on power grid equipment, safeguarding electrical components from potential damage.
6) Enhanced Energy Conservation:With a frequency conversion range spanning from 25% to 100% (compared to the conventional 50%-100%), this unit achieves over 30% energy savings compared to fixed-speed compressors. For systems with variable gas needs, the energy-saving effect is even more significant.
7) Unique Two-Stage Compression Air End:Our innovative two-stage compression screw design integrates both first and second-stage rotors within a single casing. Gears drive each stage to achieve optimal linear speeds, thereby enhancing overall compression efficiency.
8) Innovative Internal Spray Curtain Cooling:Utilizing a high-efficiency internal spray curtain cooling method, it significantly reduces compressed air temperature, achieving near-isothermal compression. This technique minimizes pressure loss and enhances compression efficiency.
9) Minimized Internal Leakage:By incorporating two-stage compression, we reduce the compression ratio for each stage, thereby decreasing internal leakage and improving volumetric efficiency.
10) Superior Noise Reduction:Two-stage compression not only lowers the compression ratio but also significantly diminishes noise levels, particularly during unloading.
11) Effortless Maintenance and Service:Besides the screw air end, the two-stage compressor's systems and structures closely resemble those of single-stage compression units, ensuring user-friendly maintenance and operation.
1. Unbeatable Price Advantage
We offer customers remarkably competitive ex-factory prices, ensuring that you maintain a significant edge over your competitors in the market.
2. Direct Transactions
All our products are delivered directly from the factory, allowing us to provide exceptionally cost-effective solutions.
3. Comprehensive OEM & ODM Services
With our robust production infrastructure and efficient management, we seamlessly cater to all your OEM/ODM service needs.
4. Tailored Customization
We welcome non-standard, export-oriented, voltage/power/pressure custom orders. Discuss your specific requirements with us, and we will meticulously fulfill your demands.
5. Small Order Acceptance
Begin with a small trial order to experience the superior quality of our products firsthand.
6. Rapid Delivery
We pledge prompt and timely delivery of our top-tier products, ensuring your operations continue without interruption.
7. Comprehensive Authorization
For our valued distributors, we provide full authorization certification, empowering you to sell our prestigious SANZHI brand products with confidence.
Successful Cases
Sanzhi (Henan) Compressor Co., Ltd. stands as a distinguished leader in the manufacturing of high-performance screw air compressors and screw vacuum pumps. With over a decade of unparalleled industry expertise, our extensive product portfolio spans normal pressure and low-pressure screw air compressors, innovative permanent magnet frequency conversion screw air compressors, sophisticated two-stage compression screw air compressors, specialized screw air compressors for laser cutting, versatile single-tank and double-tank mobile screw air compressors, and both electric and diesel mobile screw air compressors. Additionally, our range includes cutting-edge screw vacuum pumps, designed to meet a variety of industrial needs.
Our state-of-the-art production facility is synonymous with efficiency and innovation. Through advanced, lean multi-air compressor assembly lines, we achieve remarkable productivity. Supported by a dedicated team of over 50 skilled employees, we constantly refine our management systems, including the implementation of ERP, to minimize lead times and ensure the swift delivery of premium products.
At Sanzhi (Henan) Compressor Co., Ltd., our unwavering commitment to quality management is demonstrated by our ISO9001 certification. We strictly adhere to rigorous quality control protocols, ensuring each machine undergoes comprehensive inspections-including raw material verifications, meticulous production assessments, and thorough pre-delivery evaluations.
Our commitment to exceptional customer service encompasses every stage, from pre-sales to post-purchase. Before the sale, we provide expert guidance to help you select the perfect air equipment and offer extensive customization options, including bespoke OEM products to meet specific dealer requirements. After your purchase, our professional sales and support team are always on hand to respond promptly to your needs.
At Sanzhi (Henan) Compressor Co., Ltd., we are devoted to delivering superior, dependable products and nurturing enduring customer relationships. Our dedication to efficient delivery, outstanding quality, and competitive pricing positions us as your trusted partner for optimal compressed air solutions.
Situated in the heart of Xinzheng City, Henan Province, China, our factory offers convenient access and complimentary transportation from Xinzheng International Airport. Located just 30 kilometers away, the journey to our facility takes approximately one hour. We eagerly anticipate your visit to our company!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a professional manufacturer specializing in screw air compressors, with over a decade of industry experience.
Q2. How do you control quality?
A: 1. We conduct thorough inspections of all raw materials.
2. We maintain stringent control over installation procedures.
3. Each machine is subjected to a minimum of 5 hours of continuous testing before dispatch.
Q3. What information must I provide to get the suitable machine?
1. Desired air delivery capacity (Unit: CFM or m³/Min)
2. Required working pressure (Unit: PSI, Bar or Mpa)
3. Voltage and frequency in your country (V/Hz)
4. Additional accessories needed, such as air tanks, filters, or air dryers.
Provide us with this information, and we will customize a solution precisely for you!
Q4. What is the general unit conversion?
1Bar = 0.1Mpa = 14.5PSI
1m³/min = 35.32cfm
1KW = 1.34HP
Q5. What are the available voltage options for air compressors?
A: Sanzhi air compressors come in various voltage options, including 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, and 440v/60hz/3p. Additional customization options are available to suit your specific requirements.
Q6. How long is the delivery time?
A: For standard voltage models, our efficient delivery process ensures your order is ready within a swift 15 working days after confirmation. For non-standard voltage requirements, please contact our dedicated sales team for tailored assistance and precise delivery timelines.
Q7. What's the payment term?
A: We have a client-friendly payment structure: 30% T/T in advance, 40% T/T before shipment, and the remaining 30% T/T upon receipt of the B/L copy. Payments are accepted in both USD and RMB, providing flexibility for our valued customers.
Q8. How about your warranty?
A: We stand behind our products with a comprehensive one-year warranty on the entire machine and an extended two-year warranty specifically for the screw air compressor, excluding consumable spare parts. This ensures peace of mind and reliability.
Q9. What about the maintenance?
A: The first maintenance service is crucial and should be performed after 500 hours of operation. Following this, regular maintenance should be scheduled every 2000-3000 hours, adjusted based on the actual working conditions to ensure optimal performance.
Q10. Can machines be run in high-temperature environment?
A: Absolutely, our machines are meticulously engineered to operate efficiently in high-temperature environments, withstanding a wide working temperature range from -20° to 45° (-4ºF to 113ºF). This robustness guarantees reliability even in demanding conditions.
Q11. Do you offer OEM service?
A: Yes, we proudly offer OEM & ODM services. Our expert design team is ready to embrace customized orders, ensuring your specific requirements are met with precision and excellence.
Q12. How long could your air compressor be used?
A: Our air compressors are engineered for durability and longevity, typically providing reliable service for over 10 years, making them a valuable long-term investment.
Q13. Will you provide some spare parts for the machines?
A: Certainly, to ensure the seamless and continuous operation of your machines, we provide essential spare parts as part of our commitment to your satisfaction.
Q14. How about your after-sales service?
A: We offer comprehensive after-sales support. This includes online installation and commissioning instructions and, if required, the arrangement of our skilled engineers to assist with on-site training and installation, ensuring your machine operates at peak efficiency.
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