Internal Structure Frontside
Internal Structure Backside
Working Principle
In the optimal realm of air compression, the energy required for a single-stage pressure transmission equals the total energy necessary for multi-stage compression. However, in real-world applications, various challenges such as coupling transmission inefficiencies, bearing friction, and the cooling effect of viscosity cause a rise in operational power. By strategically reducing the compression ratio at each stage, we can significantly decrease overall power consumption in multi-stage compression systems, thereby surpassing the efficiency of single-stage compression.
The two-stage screw air compressor is meticulously crafted with a dual-stage rotary screw mechanism, where each stage incorporates a dynamic partnership between active and passive screws. The active screw, energized by an external power source, ingeniously drives the passive screw. This groundbreaking design uses a low-pressure rate screw assembly for the initial phase, transitioning smoothly to a high-pressure rate screw group in the secondary phase. Encased in a cutting-edge sealing air film, each screw optimizes performance. As the screws rotate, the air undergoes a remarkable transformation through three crucial stages: suction, pressurization, and exhaust.
First Stage Compression: In the initial stage of the two-stage screw air compressor, a specialized low-pressure rate screw assembly works with precision to compress the gas, which is expertly drawn into the compression chamber through the suction valve. The high-speed rotation of the screw rotor diligently compresses the gas, efficiently prepping it for the subsequent stage.
Second Stage Compression: As the gas advances into this stage, it finds itself in a more confined screw space, dramatically amplifying its temperature and pressure. The exhaust valve opens with precision to efficiently release the high-pressure gases from the system, marking the successful completion of the compression journey.
Natural air is meticulously guided into the first compression stage via an advanced air filter, merging seamlessly with an exact measure of lubricating oil. This expertly compressed mixture reaches an interstage pressure. Following compression, the gas moves through a cooling channel, encountering a substantial oil mist that effectively lowers its temperature. This cooled gas is then driven into the second-stage rotor, where it undergoes further compression to reach the desired final exhaust pressure. In a masterful finale, the compressor expertly expels the gas through 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:Discover a groundbreaking elevation in performance with our PM motor, where the spectrum for constant torque and weak magnetic ranges is strikingly broader. Witness an impressive enhancement in efficiency by up to 20-30% over conventional motors. This innovative permanent magnet motor maintains its superior efficiency even under varying frequency conditions, consistently delivering exceptional and reliable performance.
2) Maintenance-Free Motor:Expertly engineered, this bearing-free permanent magnet motor abolishes the hassle and expense of bearing maintenance and replacements. Enjoy a truly maintenance-free operation, promising continuous uptime and reduced operational costs.
3) Advanced Integrated Frequency Converter:Our compressor is outfitted with China's leading frequency system, offering unparalleled precision and an expansive speed regulation range. It adapts intuitively to actual gas demand, showcasing remarkable energy-saving prowess and ensuring that your energy costs are kept to a minimum.
4) Zero Transmission Loss:An innovative, tightly integrated shaft connection between the permanent magnet motor and compressor does away with traditional couplings and transmission components. This results in a flawless 100% transmission efficiency, making it an engineering marvel in energy conservation.
5) Variable and Soft Start MechanismsSafeguard your power grid infrastructure with our advanced variable frequency start and soft start functionalities. By minimizing impact, these mechanisms ensure the longevity and protection of electrical components, preventing potential damage and optimizing performance stability.
6) Enhanced Energy Conservation:Experience groundbreaking energy savings with a frequency conversion range that spans from 25% to 100%, surpassing the traditional 50%-100% range. This unit achieves more than 30% energy efficiency compared to fixed-speed compressors, with even greater savings in systems facing fluctuating gas demands.
7) Unique Two-Stage Compression Air End:Discover the prowess of our two-stage compression screw design, which seamlessly integrates first and second-stage rotors in a single casing. Driven by precision gears, each stage optimizes linear speeds, dramatically amplifying overall compression efficiency to new heights.
8) Innovative Internal Spray Curtain Cooling:Harness the power of high-efficiency internal spray curtain cooling, which significantly lowers compressed air temperature. This cutting-edge technique achieves near-isothermal compression, reducing pressure loss and substantially elevating compression efficiency for unparalleled performance.
9) Minimized Internal Leakage:Through the revolutionary two-stage compression, each stage's compression ratio is reduced, effectively minimizing internal leakage. This boosts volumetric efficiency and ensures optimal performance and reliability.
10) Superior Noise Reduction:Our two-stage compression innovation not only reduces the compression ratio for enhanced efficiency but also significantly curtails noise levels, especially noticeable during unloading, creating a more pleasant and quieter working environment.
11) Effortless Maintenance and Service:Designed with parity to single-stage units, aside from the screw air end, our two-stage compressor offers user-friendly maintenance. Its ease of operation ensures straightforward serviceability, enhancing the overall user experience.
12) Door Panels are Removable:Crafted with sound-dampening metal panels and lined with premium sound-absorbing materials, this unit adheres to international noise standards. The removable door panels provide an expansive 270-degree access, dramatically simplifying maintenance tasks, optimizing service efficiency, and ensuring compliance with global noise standards.
1. Unbeatable Price Advantage
We empower our esteemed clients with competitive and factory-direct pricing, ensuring you maintain a strategic edge in the ever-evolving market landscape.
2. Seamless Direct Transactions
By utilizing direct factory supply for all our superior products, we provide you with the most cost-effective solutions on the market.
3. Comprehensive OEM & ODM Services
With a wealth of production expertise and sound management capabilities, we are committed to meeting all your OEM/ODM service needs with unmatched accuracy and dedication.
4. Tailored Customization
Experience our bespoke customization services for non-standard, export, voltage/power/pressure specifications. Let's collaborate to design the perfect solution tailored to your unique requirements.
5. Small Order Flexibility
Start with a small trial order and witness the exceptional quality and reliability our products consistently offer.
6. Expedited Rapid Delivery
We pledge to deliver our premium products promptly, ensuring your operations remain uninterrupted and efficient.
7. Robust Comprehensive Authorization
For our valued distributors, we provide complete authorization certification, empowering you to confidently promote and market our prestigious SANZHI brand products.
Sanzhi (Henan) Compressor Co., Ltd. stands as an eminent leader in the manufacturing industry, highly acclaimed for our specialized expertise in developing screw air compressors and screw vacuum pumps. Over the span of a decade, we have honed our skills and expanded our product offerings to include an extensive selection of high-quality solutions. Our impressive portfolio boasts normal pressure and low-pressure screw air compressors, innovative permanent magnet frequency conversion screw air compressors, and pioneering two-stage compression screw air compressors. We also provide specialized screw air compressors for laser cutting, dynamic single-tank and double-tank mobile screw air compressors, versatile electric and diesel mobile screw air compressors, and state-of-the-art screw vacuum pumps, among other groundbreaking innovations.
In our state-of-the-art production facility, we achieve unparalleled efficiency through our meticulously designed, lean multi-air compressor assembly lines. Supported by a dedicated team of over 50 extraordinary employees, our operations thrive on continuous improvements in management systems, including ERP, aiming to minimize lead times seamlessly and ensure the swift delivery of superior quality products.
With an unyielding dedication to quality management, our factory proudly holds ISO9001 certification. We strictly adhere to rigorous quality management protocols, ensuring every machine undergoes comprehensive inspections, including material checks, production evaluations, and thorough pre-delivery assessments.
Our stellar customer service journey encompasses every phase from pre-sales to after-sales. Before purchase, we provide expert consultations to guide you in selecting the perfect air equipment. We offer expansive customization options, including bespoke OEM products tailored to meet specific dealer needs. After purchase, our highly skilled sales and service team stands ready to promptly address and fulfill customer requests.
At Sanzhi (Henan) Compressor Co., Ltd., we remain steadfastly committed to delivering superior, reliable products while fostering enduring customer relationships. Our unwavering dedication to efficient delivery, outstanding quality, and competitive pricing positions us as your esteemed partner for the most effective compressed air solutions.
Our strategically located factory in Xinzheng City, Henan Province, China, offers complimentary transportation from Xinzheng International Airport, a mere 30 kilometers away. This convenient journey, which takes approximately one hour, ensures a warm welcome to our esteemed company!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a distinguished manufacturer specializing in screw air compressors, boasting over a decade of industry excellence.
Q2. How do you control quality?
A: 1. We conduct rigorous inspections of all raw materials to ensure top-notch quality.
2. We uphold strict control over installation procedures to maintain superior standards.
3. Every machine undergoes at least five hours of continuous testing before it is dispatched to guarantee 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: Sanzhi air compressors are meticulously designed to accommodate a wide array of voltage needs, effortlessly aligning with varied standards like 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, and 440v/60hz/3p. For those seeking something unique, we offer bespoke customization to precisely align with your individual specifications, ensuring you receive the perfect solution tailored to your demands.
Q6. How long is the delivery time?
A: For standard voltage orders, we are committed to delivering swiftly within an impressive timeframe of just 15 working days post order confirmation. Should you require non-standard specifications, our dedicated and highly responsive sales team is on standby, ready to provide personalized support and ensure your needs are met without delay.
Q7. What's the payment term?
A: Our payment terms are crafted to offer remarkable flexibility and ease, accommodating a structure of 30% T/T in advance, 40% T/T prior to shipment, and the remaining 30% T/T upon receiving the B/L copy. Choose freely between payments in USD or RMB, depending on your preference.
Q8. How about your warranty?
A: We confidently assure you of our product's excellence with a solid one-year warranty covering the entire machine, complemented by an additional two-year warranty specifically for the screw air compressor. Please be advised that consumable spare parts fall outside the warranty's scope.
Q9. What about the maintenance?
A: To maintain peak performance, the initial maintenance should be conducted after 500 hours of operation. Thereafter, we advise scheduling regular maintenance every 2000-3000 hours, adapting to the specific conditions of your operational environment for ultimate efficiency.
Q10. Can machines be run in high-temperature environment?
A: Absolutely, our machines are ingeniously engineered to deliver outstanding performance even in high-temperature settings, with a robust operational capability within a temperature spectrum of -20° to 45°(-4ºF to 113ºF), ensuring reliability and efficiency no matter the heat.
Q11. Do you offer OEM service?
A: Yes, indeed! We are thrilled to extend our OEM & ODM services. Our highly skilled design team is fully equipped to embrace customized orders, ensuring your specific needs and visions are brought to life with precision and creativity.
Q12. How long could your air compressor be used?
A: Our air compressors are ingeniously crafted for longevity, promising steadfast reliability and robust performance that exceeds expectations and extends beyond 10 years of service.
Q13. Will you provide some spare parts for the machines?
A: Certainly, we are committed to ensuring your machines operate seamlessly and uninterrupted. We offer essential spare parts whenever necessary, delivering peace of mind and continuous productivity.
Q14. How about your after-sales service?
A: We deliver an all-encompassing suite of after-sales services, from online guidance for installation and commissioning to the deployment of our expert engineers for practical, hands-on training and installation support, guaranteeing your complete satisfaction and operational success.
){kind=link}