Internal Structure Frontside
Internal Structure Backside
Working Principle
In the ideal realm of air compression, the energy needed for single-stage pressure engagement equals the combined energy required for multiple stages. However, in practice, factors such as coupling transmission losses, bearing friction, and viscosity's cooling effects contribute to increased operational power. By minimizing each stage's compression ratio, we effectively reduce overall power consumption in multi-stage systems, achieving superior efficiency compared to single-stage setups.
This two-stage screw air compressor is ingeniously designed with a dual-stage rotary screw mechanism. Each stage boasts an active and passive screw, where the active screw, driven by an external power source, powers the passive counterpart. This cutting-edge design utilizes a low-pressure screw group initially, transitioning to a high-pressure screw group in the second stage. Each screw is enveloped in a sealing air film for optimal efficiency. As these screws rotate, the air undergoes an intricate transformation through three critical phases: suction, pressurization, and exhaust.
First Stage Compression: In the initial phase of the two-stage screw air compressor, a specialized low-pressure screw group actively compresses the gas drawn into the chamber through the suction valve. The rapid rotation of the screw rotor intensively compresses the gas, priming it for the next stage.
Second Stage Compression: As the gas advances into this phase, it enters a more confined screw space, significantly raising its temperature and pressure. The exhaust valve strategically opens to release the high-pressure gases efficiently from the system, concluding the compression journey.
Natural air is meticulously inducted into the initial compression stage via an air filter, where it seamlessly merges with a precise amount of lubricating oil. This expertly compressed mixture is propelled to an interstage pressure. Following compression, the gas navigates through a cooling conduit, encountering a robust oil mist that dramatically reduces its temperature. This cooled gas is then propelled into the second-stage rotor for further compression, achieving the targeted final exhaust pressure. Ultimately, the compressor adeptly expels the gas through the exhaust valve, completing the compression cycle with excellence.
| 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 an impressively wider constant torque and weak magnetic range. It elevates performance by a staggering 20-30% compared to conventional motors. This cutting-edge permanent magnet motor guarantees exceptional efficiency, even when not operating at the rated frequency, ensuring consistently outstanding performance.
2) Maintenance-Free Motor:Our permanent magnet motor is a masterpiece of engineering, elegantly designed without bearings. This innovation means you can say goodbye to costly bearing maintenance and replacements, granting you a truly maintenance-free experience.
3) Advanced Integrated Frequency Converter:Featuring China's top-tier frequency system, this unit is a marvel of speed regulation and precision. It adapts flawlessly to real-time gas demand, showcasing remarkable energy-saving capabilities while maintaining high performance.
4) Zero Transmission Loss:Our ingenious compact design integrates the shaft connection between the permanent magnet motor and compressor, eliminating couplings and transmission components. This seamless integration achieves a perfect 100% transmission efficiency.
5) Variable and Soft Start MechanismsOur advanced variable frequency start and soft start functions act as guardians for power grid equipment, reducing impact and protecting electrical components from damage, ensuring longevity and reliability.
6) Enhanced Energy Conservation:With an impressive frequency conversion range of 25% to 100%, surpassing the typical 50%-100%, this unit achieves energy savings of over 30% compared to fixed-speed compressors. In systems with variable gas demands, the energy-saving effect is even more pronounced.
7) Unique Two-Stage Compression Air End:Our sophisticated two-stage compression screw design houses both the first and second-stage rotors within a single casing. Driven by gears, each stage optimizes linear speeds, significantly boosting overall compression efficiency like never before.
8) Innovative Internal Spray Curtain Cooling:Harnessing the power of a high-energy saving internal spray curtain cooling technique, it dramatically decreases compressed air temperature, achieving near isothermal compression. This cutting-edge innovation reduces pressure loss and elevates compression efficiency to new heights.
9) Minimized Internal Leakage:The two-stage compression cleverly reduces the compression ratios for each stage, effectively minimizing internal leakage and significantly enhancing volumetric efficiency.
10) Superior Noise Reduction:Our two-stage compression design doesn't just lower the compression ratio; it also substantially reduces noise levels, especially noticeable during unloading, offering a quieter and more pleasant experience.
11) Effortless Maintenance and Service:Designed with the user in mind, the two-stage compressor shares system and structural similarities with single-stage units, aside from the screw air end, ensuring straightforward maintenance and seamless operation.
12) Door Panels are Removable:The unit is constructed with sound-dampening metal panels, lined with high-density sound-absorbing materials, ensuring compliance with international noise standards. The removable door panels provide an expansive 270-degree access, greatly simplifying maintenance tasks and enhancing service efficiency.
1. Unbeatable Price Advantage
We proudly present our esteemed customers with access to highly competitive, factory-direct pricing, ensuring you maintain a robust edge in ever-evolving market dynamics.
2. Direct Transactions
By capitalizing on direct factory supply for all our exceptional products, we are poised to offer you the most cost-effective and valuable solutions on the market.
3. Comprehensive OEM & ODM Services
With our vast production mastery and solid management capabilities, we adeptly fulfill all your OEM/ODM service needs with unparalleled precision and professionalism.
4. Tailored Customization
Experience our tailored approach with custom orders addressing non-standard, export, voltage/power/pressure specifications. Connect with us to discuss your distinctive needs, and we will craft a personalized solution that aligns perfectly with your specifications.
5. Small Order Acceptance
Begin with a small trial order and witness firsthand the exceptional quality that our products consistently embody.
6. Rapid Delivery
We are steadfast in our commitment to timely delivery, ensuring that our premium products reach you quickly, keeping your operations seamlessly uninterrupted and efficient.
7. Comprehensive Authorization
For our valued distributors, we provide complete authorization certification, enabling you to market our esteemed SANZHI brand products with confidence and prestige.
Sanzhi (Henan) Compressor Co., Ltd. stands as a distinguished leader in the manufacturing realm, celebrated for our specialized expertise in screw air compressors and screw vacuum pumps. With an illustrious legacy spanning over a decade, our company offers an expansive array of sophisticated products. Our impressive lineup includes normal pressure and low-pressure screw air compressors, cutting-edge permanent magnet frequency conversion screw air compressors, advanced two-stage compression screw air compressors, specialized screw air compressors for laser cutting, and dynamic single-tank and double-tank mobile screw air compressors. Additionally, we provide versatile electric and diesel mobile screw air compressors, along with state-of-the-art screw vacuum pumps, setting a benchmark for innovation and quality in the industry.
In our avant-garde production facility, we harness unmatched efficiency through our meticulously engineered, lean multi-air compressor assembly lines. This efficiency is buoyed by our dedicated team of over 50 exceptional employees, who thrive on continuous management system enhancements like ERP. These enhancements are pivotal in minimizing lead times and ensuring the expeditious delivery of superior quality products, embodying our commitment to excellence and precision.
With an unwavering commitment to quality management, our factory proudly upholds the prestigious ISO9001 certification. We strictly adhere to rigorous quality management protocols, ensuring each machine undergoes comprehensive inspections. This meticulous process includes material checks, production evaluations, and rigorous pre-delivery assessments, all designed to ensure our products meet the highest quality standards every time.
Our exemplary customer service journey spans from pre-sales to after-sales. Before your purchase, we offer expert consultation to guide you in selecting the perfect air equipment, with extensive customization options, including bespoke OEM products tailored for specific dealer needs. After your purchase, our highly skilled sales and service team remains poised to swiftly address and fulfill customer requests, ensuring satisfaction and continued support.
At Sanzhi (Henan) Compressor Co., Ltd., we are unwaveringly devoted to delivering superior, dependable products while nurturing long-lasting customer relationships. Our steadfast commitment to efficient delivery, outstanding quality, and competitive pricing elevates us as your esteemed partner for the most effective compressed air solutions, designed to meet and exceed your expectations.
Our strategically situated factory in Xinzheng City, Henan Province, China, offers complimentary transportation from Xinzheng International Airport, just 30 kilometers away. This convenient, approximately one-hour journey ensures a warm and hospitable welcome to our esteemed company, setting the stage for an exceptional experience with Sanzhi.
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. Our commitment to innovation and quality sets us apart as industry leaders, consistently delivering superior products.
Q2. How do you control quality?
A: 1. We conduct rigorous inspections of all raw materials to ensure top-notch quality, guaranteeing that only the best materials are used in production.
2. We uphold strict control over installation procedures to maintain superior standards throughout the manufacturing process, ensuring durability and reliability.
3. Every machine undergoes at least five hours of continuous testing before it is dispatched to guarantee reliability and peak performance, embodying our commitment to excellence.
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! Our dedication to customization ensures optimal satisfaction and performance.
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 engineered to accommodate a diverse array of voltage requirements, such as 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, and 440v/60hz/3p. Plus, we offer customization options to perfectly tailor our compressors to your specific needs, ensuring a seamless fit for your application.
Q6. How long is the delivery time?
A: For orders featuring standard voltage specifications, we excel with a rapid delivery time of a mere 15 working days post confirmation. For any non-standard requirements, our exemplary sales team is readily available to provide personalized assistance and solutions.
Q7. What's the payment term?
A: We offer flexible and convenient payment terms: 30% T/T in advance, 40% T/T before shipment, and the concluding 30% T/T upon receipt of the B/L copy. Payments can be made in either USD or RMB, as per your preference.
Q8. How about your warranty?
A: We confidently back our products with a comprehensive one-year warranty for the entire machine, along with an extended two-year warranty specifically for the screw air compressor. Please be advised that consumable spare parts are not covered under this warranty.
Q9. What about the maintenance?
A: Scheduled maintenance is crucial for optimal performance. The first maintenance should occur after 500 hours of use. Thereafter, we advise regular maintenance every 2000-3000 hours, adjusted to the specific working environment to maintain peak efficiency and longevity.
Q10. Can machines be run in high-temperature environment?
A: Certainly, our machines are meticulously designed to deliver outstanding performance in high-temperature conditions, efficiently operating within a temperature spectrum of -20° to 45°(-4ºF to 113ºF).
Q11. Do you offer OEM service?
A: Absolutely! We are thrilled to provide OEM & ODM services. Thanks to the expertise of our skilled design team, we welcome custom orders tailored to your precise specifications and unique needs.
Q12. How long could your air compressor be used?
A: Our air compressors are renowned for their remarkable durability and longevity, expertly crafted to deliver reliable performance for an impressive duration surpassing 10 years.
Q13. Will you provide some spare parts for the machines?
A: Absolutely, to ensure the continuous and smooth operation of your machines, we provide essential spare parts as required, fostering uninterrupted functionality.
Q14. How about your after-sales service?
A: Our comprehensive after-sales services include online guidance for installation and commissioning, complemented by the availability of our highly skilled engineers who can offer hands-on training and installation support to enhance your experience.
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