Internal Structure Frontside
Internal Structure Backside
Working Principle
In the prestigious realm of air compression technology, achieving pinnacle energy efficiency is of utmost importance. The theoretical energy requirements for a single-stage compression mirror the total energy demands of a multi-stage process. However, real-world applications introduce complexities such as coupling inefficiencies, bearing friction, and viscosity-related cooling challenges that increase power needs. By strategically minimizing the compression ratio at each stage, multi-stage systems can significantly decrease overall power consumption, thereby offering superior efficiency compared to single-stage systems.
This groundbreaking two-stage screw air compressor stands as a testament to advanced engineering, boasting a dual-stage rotary screw design. Each stage is a marvel of harmonious synergy, where active and passive screws collaborate in unison. Driven by an external force, the active screw skillfully propels the passive one. This innovative approach utilizes a low-pressure screw assembly initially, seamlessly transitioning to a high-pressure screw configuration for the secondary phase. Enveloped in a cutting-edge sealing air film, each screw achieves maximum performance. The rotation of the screws guides the air through a captivating journey of suction, pressurization, and eventual exhaust, showcasing engineering brilliance.
First Stage Compression: In the initial stage of the two-stage screw air compressor, a highly specialized low-pressure screw assembly meticulously compresses the gas. The gas is expertly drawn into the compression chamber through the suction valve, meeting the high-speed rotation of the screw rotor, setting the stage for efficient compression and preparing it perfectly for the subsequent phase.
Second Stage Compression: As the gas advances to this stage, it enters a more confined screw space, significantly elevating its temperature and pressure with remarkable precision. The exhaust valve opens with precision to release the high-pressure gases from the system, triumphantly concluding the compression journey.
Natural air is expertly directed into the initial compression stage through a sophisticated air filter, seamlessly blending with a precise amount of lubricating oil. This expertly compressed mixture achieves an interstage pressure. Post-compression, the gas traverses a cooling channel, where it encounters an extensive oil mist that effectively lowers its temperature. This cooled gas is then directed into the second-stage rotor, where it undergoes further compression to achieve the desired final exhaust pressure. In a masterful conclusion, the compressor efficiently expels the gas via the exhaust valve, completing the entire compression cycle with flawless precision.
| 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:Experience the future of efficiency with our PM motor, which offers a remarkably wide range of constant torque and weak magnetic capabilities. Revel in an astounding 20-30% increase in efficiency compared to traditional motors. This pioneering permanent magnet motor retains its exceptional performance regardless of frequency changes, ensuring consistent excellence.
2) Maintenance-Free Motor:Meticulously designed, this bearing-free permanent magnet motor eliminates the complexities and costs associated with bearing upkeep. Delight in truly maintenance-free operation, ensuring uninterrupted uptime and lowering operational expenses.
3) Advanced Integrated Frequency Converter:Equipped with China's premier frequency system, our compressor delivers unmatched precision and an extensive speed control range. By adjusting seamlessly to real-time gas demand, it highlights its impressive energy-saving capabilities, keeping your energy expenditures exceptionally low.
4) Zero Transmission Loss:Ingeniously designed, the seamless shaft connection between the permanent magnet motor and compressor eliminates traditional couplings and transmission components. This results in perfect 100% transmission efficiency, exemplifying an engineering masterpiece in energy preservation.
5) Variable and Soft Start MechanismsProtect your power grid with our sophisticated variable frequency start and soft start systems. Minimizing impact, these technologies ensure the durability and security of electrical components, preventing potential harm and optimizing operational stability.
6) Enhanced Energy Conservation:Achieve revolutionary energy savings with a frequency conversion range extending from 25% to 100%, exceeding the conventional 50%-100% range. This unit delivers over 30% more energy efficiency compared to fixed-speed compressors, particularly beneficial in environments with variable gas demands.
7) Unique Two-Stage Compression Air End:Witness the strength of our two-stage compression screw design, which masterfully combines first and second-stage rotors within a single casing. Propelled by precision gears, each stage enhances linear speeds, significantly boosting total compression efficiency to unprecedented levels.
8) Innovative Internal Spray Curtain Cooling:Leverage the efficiency of a high-performance internal spray curtain cooling system, which considerably lowers compressed air temperatures. This state-of-the-art method achieves close to isothermal compression, minimizing pressure loss and vastly improving compression efficiency for exceptional performance.
9) Minimized Internal Leakage:Thanks to the revolutionary two-stage compression, the reduction in each stage's compression ratio effectively minimizes internal leakage. This enhances volumetric efficiency, ensuring peak performance and reliability.
10) Superior Noise Reduction:Our two-stage compression not only lowers the compression ratio for improved efficiency but also significantly reduces noise levels, especially noticeable during unloading, fostering a quieter and more pleasant work environment.
11) Effortless Maintenance and Service:Designed for convenience akin to single-stage units, with the exception of the screw air end, our two-stage compressor ensures user-friendly maintenance. Its straightforward operation enhances serviceability, elevating the overall user experience.
12) Door Panels are Removable:Built with sound-dampening metal panels and lined with superior sound-absorbing materials, this unit meets global noise standards. The removable door panels offer a generous 270-degree access, vastly simplifying maintenance, optimizing service efficiency, and ensuring adherence to international noise standards.
1. Unbeatable Price Advantage That Can't Be Overlooked
We empower our esteemed clients with highly competitive, factory-direct pricing. This ensures you maintain a strategic edge over competitors in the ever-evolving market landscape, driving your success.
2. Seamless and Effortless Direct Transactions
Through direct factory supply of all our superior products, we offer you the most cost-effective solutions on the market, eliminating unnecessary overheads and enhancing value.
3. Extensive and Comprehensive OEM & ODM Services
Armed with a wealth of production expertise and impeccable management capabilities, we are committed to meeting all your OEM/ODM service needs with unmatched accuracy and unwavering dedication.
4. Tailored and Precision Customization
Experience our bespoke customization services designed for non-standard, export, voltage/power/pressure specifications. Together, we can create the perfect solution tailored to your specific and unique requirements.
5. Flexible Small Order Options
Begin with a small trial order to experience firsthand the exceptional quality and unwavering reliability our products consistently deliver, setting a new standard in excellence.
6. Swift and Expedited Rapid Delivery
We commit to delivering our premium products promptly and efficiently, ensuring your operations remain uninterrupted and continue to run smoothly and efficiently.
7. Robust and Comprehensive Authorization
For our esteemed distributors, we offer complete authorization certification, empowering you to confidently promote and market our prestigious SANZHI brand products with assurance and pride.
Sanzhi (Henan) Compressor Co., Ltd. stands as a hallmark of innovation and excellence in the manufacturing realm, celebrated for our profound expertise in designing screw air compressors and screw vacuum pumps. Over the past decade, we have honed our skills and broadened our offerings to deliver a diverse array of top-tier solutions. Our esteemed collection features standard and low-pressure screw air compressors, pioneering permanent magnet frequency conversion models, and sophisticated two-stage compression screw air compressors. Our specialized range also includes screw air compressors for laser cutting, dynamic single-tank and double-tank mobile screw air compressors, versatile electric and diesel mobile versions, and state-of-the-art screw vacuum pumps-a showcase of our pioneering spirit.
Within our state-of-the-art production facility, we achieve unmatched operational efficiency, courtesy of our meticulously designed lean multi-air compressor assembly lines. Supported by a dedicated team of over 50 exceptional employees, our operations thrive on continuous improvements to management systems, including ERP, aimed at minimizing lead times and ensuring rapid delivery of products that are second to none in quality.
Upholding an unwavering commitment to excellence, our factory proudly holds the ISO9001 certification. We adhere to stringent and rigorous quality management protocols, ensuring that each machine undergoes exhaustive inspections-from meticulous material checks to comprehensive production evaluations-culminating in thorough pre-delivery assessments.
Our encompassing customer service journey covers every phase from pre-sales to after-sales. Before purchasing, we offer expert consultations, guiding you to select the ideal air equipment. We provide extensive customization options, including bespoke OEM products tailored to specific dealer requirements. After purchase, our highly trained sales and service team is ever-ready to promptly address and fulfill any customer inquiries and requests.
At Sanzhi (Henan) Compressor Co., Ltd., we are steadfast in our pursuit of delivering superior, trustworthy products while fostering enduring customer relationships. Our commitment to swift delivery, outstanding quality, and competitive pricing firmly positions us as your trusted partner in securing the most efficient compressed air solutions.
Strategically nestled in Xinzheng City, Henan Province, China, our factory offers complimentary transportation from Xinzheng International Airport, a mere 30 kilometers away. This convenient one-hour journey ensures a warm and hospitable introduction to our esteemed company!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a distinguished manufacturer specializing in screw air compressors, proudly possessing over a decade of industry excellence and innovation.
Q2. How do you control quality?
A: 1. We conduct thorough inspections on all raw materials to ensure they meet our exceptional quality standards.
2. We enforce stringent control over our installation processes to maintain our superior standards.
3. Each machine is subjected to a minimum of five hours of continuous testing prior to dispatch, guaranteeing exceptional reliability.
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 precise information, and we will craft a tailored solution to perfectly suit your needs!
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: Experience the pinnacle of precision with Sanzhi air compressors, meticulously crafted to effortlessly meet a diverse array of voltage needs. Whether your requirements align with standard options such as 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, or 440v/60hz/3p, rest assured, our compressors are ready to perform. For those seeking a bespoke touch, our customization services stand at the ready, delivering tailor-made solutions that align precisely with your unique needs, ensuring an unmatched fit and finish.
Q6. How long is the delivery time?
A: For orders with standard voltage, we commit to a swift delivery process, achieving dispatch within an impressive 15 working days post order confirmation. For orders with non-standard specifications, our diligent sales team is on hand to offer personalized support, ensuring your requirements are seamlessly met without delay.
Q7. What's the payment term?
A: Our payment terms are structured to offer optimal flexibility and ease, comprising 30% T/T initially, 40% T/T before shipment, and the final 30% T/T upon receipt of the B/L copy. Payments can be processed in either USD or RMB, aligning with your preferences for a smooth transaction process.
Q8. How about your warranty?
A: We guarantee the superiority of our products with a robust one-year warranty on the entire machine, complemented by an additional two-year warranty specifically for the screw air compressor. Please be aware, consumable spare parts are excluded from this warranty.
Q9. What about the maintenance?
A: To maintain optimal compressor performance, we recommend the first maintenance following 500 hours of operation. Subsequent routine maintenance is advised every 2000-3000 hours, customized to your operational environment to ensure peak efficiency.
Q10. Can machines be run in high-temperature environment?
A: Absolutely! Our machines are engineered to deliver exceptional performance even in high-temperature environments, maintaining robust functionality within a wide temperature range of -20° to 45° (-4ºF to 113ºF), ensuring reliable efficiency.
Q11. Do you offer OEM service?
A: Absolutely! Our OEM & ODM services are designed to cater to your specific requirements. Our proficient design team is fully equipped to handle customized orders, transforming your unique needs and creative concepts into reality with precision.
Q12. How long could your air compressor be used?
A: Engineered for exceptional durability, our air compressors promise unwavering performance and reliability, withstanding the test of time to offer more than 10 years of outstanding service.
Q13. Will you provide some spare parts for the machines?
A: Certainly, we are committed to ensuring uninterrupted machine operation. We supply essential spare parts as needed, providing peace of mind and continuous productivity.
Q14. How about your after-sales service?
A: We offer an extensive range of after-sales services, from online installation guidance and commissioning to deploying our expert engineers for hands-on training and installation support, ensuring your complete satisfaction and operational excellence at every phase.
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