Introducing the revolutionary Low-Pressure Compressor by Sanzhi (Henan) Compressor Co., Ltd.! This cutting-edge, Two-Stage Compression Permanent Magnet Variable Frequency Drive Screw Air Compressor has been masterfully engineered to redefine industrial excellence. Available in a comprehensive range of power options-including 15KW, 22KW, 30KW, 37KW, 45KW, 55KW, 75KW, 90KW, 110KW, 132KW, 160KW, 185KW, 200KW, and 250KW-this versatile marvel guarantees unparalleled efficiency and reliability. Elevate your operations with this state-of-the-art solution, meticulously crafted to meet the diverse and demanding requirements of today's modern industries. Experience the peak of performance, where innovation meets reliability, and transform your productivity with the unparalleled capabilities of the Sanzhi Reliable Industrial High Power Twin-Stage Screw Air Compressor System.
Internal Structure Frontside
Internal Structure Backside
Working Principle
In an ideal air compression scenario, the energy required for single-stage pressure transmission equates to the combined energy demands of multi-stage compression. Realistically, however, factors such as coupling power losses, bearing friction, and the cooling effects of fluid viscosity result in higher operational power requirements. Reducing the compression ratio at each stage minimizes these inefficiencies. Consequently, the total power consumption for multi-stage compression is lower than that of single-stage compression.
Our cutting-edge two-stage screw air compressor features a highly advanced twin-stage rotary screw mechanism. This groundbreaking system includes an active screw in each stage driving a passive screw via a robust external power transmission setup. The first stage uses a low-pressure screw group, while the second stage employs a high-pressure screw group. Each screw is meticulously encased within a sealing air film. During operation, the gas undergoes a tri-phase process-suction, pressurization, and exhaust-ensuring unparalleled compression efficiency.
First Stage Compression: In the initial stage of our two-stage screw air compressor, the gas is efficiently compressed using a low-pressure screw group. The gas is first drawn into the compression chamber through the suction valve, where the high-speed rotation of the screw rotor compresses it. This compressed gas is then seamlessly transferred to the second stage.
Second Stage Compression: In the second stage screw group, the gas is further compressed within a more confined screw space, achieving higher temperatures and pressures. The process culminates as the exhaust valve opens, releasing the high-pressure gases from the system, thus completing the sophisticated compression cycle.
Natural air is initially drawn through the air filter into the first compression stage, where it merges with a small quantity of lubricating oil. This mixture is compressed to an intermediate pressure. Subsequently, the gas moves into a cooling channel, where it interacts with a significant amount of oil mist, dramatically lowering its temperature. The cooled, compressed gas then advances to the second-stage rotor for its final compression to the ultimate exhaust pressure. The fully compressed gas then exits the system through the exhaust valve, thus completing the highly efficient compression cycle.
1) High efficiency of PM motor:Experience unparalleled efficiency with our advanced permanent magnet motor. Its constant torque range and weak magnetic range are significantly wider, delivering an efficiency boost of 20-30% over conventional motors. Even when operating away from the rated frequency, the motor sustains its high efficiency, ensuring optimal performance at all times.
2) Two-stage compression unique air end:Our revolutionary two-stage compression screw machine features a uniquely designed air end. The first and second-stage compression rotors are combined within a single casing and driven directly by gears, enabling each rotor to achieve the optimal linear speed and thereby maximizing compression efficiency.
3) Integrated frequency converter: Equipped with China's premier frequency system, the air compressor offers a wide range of speed regulation and high precision. Users can modulate the frequency according to actual gas demand, leading to remarkable energy savings and operational efficiency.
4) Reduce internal leakage:Employing two-stage compression technology reduces the compression ratio for each stage, thereby minimizing internal leakage from the high-pressure end to the low-pressure end while significantly enhancing volumetric efficiency.
5) Variable frequency start and the soft startof the motor are achieved, significantly reducing the impact on power grid equipment and preventing damage to electrical components.
6) Reduce energy consumption: Our frequency conversion operates from 25% to 100%, a significant improvement over the ordinary 50% to 100% range. Compared to fixed-speed air compressors, energy savings can exceed 30%. Even against regular variable frequency compressors, it offers around 5% more energy efficiency, with greater savings for systems with fluctuating gas demands.
7) No transmission loss: The permanent magnet motor and compressor utilize an embedded integrated shaft direct connection structure, making it more compact. With no couplings or other transmission parts, the transmission efficiency reaches an unparalleled 100%.
8) Air cooling method: Our high energy-efficient air cooling method delivers excellent cooling performance, significantly reducing the temperature of compressed air. This near-isothermal compression also minimizes pressure loss between stages, reducing the compression ratio and enhancing overall efficiency.
9)Smart Touch Controller:Our state-of-the-art built-in intelligence requires minimal manual operation. Featuring a high-precision color electronic screen, it provides clear graphical displays, maintenance information, fault alarms, and safety shutdown alerts for seamless operation.
10)Special Type Intake Valve:Automatically controlled opening ensures smooth engine fuel injection and lubricating oil circulation.
Ultra-low oil circuit loss enhances overall efficiency.
The normally open solenoid valve automatically closes during emergency stops to prevent oil injection, ensuring system safety.
11)Excellent Air Filter:Our top-tier air filter boasts exceptional air purification capabilities, ensuring a clean air system with three-stage filtration for superior air quality. It efficiently removes steam and dust, meeting stringent emission standards.
12)High-Quality Soundproof Cotton:Our compact noise reduction housing, coupled with high-quality soundproof cotton, minimizes operational vibration and significantly enhances noise reduction, ensuring a quieter, more efficient workspace.
13) Motor maintenance-free:Our permanent magnet motor, free of internal bearings, eliminates the need for motor bearing maintenance and replacement, reducing long-term maintenance costs and enhancing reliability.
14) Noise reduction:Experience unparalleled tranquility with our state-of-the-art two-stage compression technology. This cutting-edge system significantly lowers the compression ratio, dramatically reducing operational noise, especially during unloading. Revel in a quieter, more efficient working environment and elevate your productivity with the Sanzhi Reliable Industrial High Power Twin-Stage Screw Air Compressor System.
15) Effortless Maintenance and Service:Our innovative two-stage compressor unit preserves the familiar structure and systems of a single-stage compressor. By excluding only the screw air end, we ensure that maintenance and service remain straightforward and user-friendly for everyone. Enjoy hassle-free upkeep and consistent, optimal performance with the Sanzhi Reliable Industrial High Power Twin-Stage Screw Air Compressor System.
| 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. Unbeatable Competitive Pricing
Experience unparalleled value by partnering with Sanzhi (Henan) Compressor Co., Ltd. Secure direct access to unbeatable factory-direct prices, ensuring you stay ahead in a competitive marketplace.
2. Direct, Seamless Transactions
Take advantage of superior cost-efficiency and the confidence of direct transactions. All our products come straight from the factory to you, guaranteeing maximum savings and unmatched reliability.
3. Custom OEM & ODM Services
Experience the power of our extensive production and management capabilities. We offer bespoke OEM and ODM services tailored to your exact specifications, ensuring your unique requirements are flawlessly met.
4. Tailored Solutions for You
We excel in fulfilling non-standard and export orders, adapting to specific voltage, power, and pressure needs. Contact us with your customization requests, and we'll deliver solutions that perfectly align with your expectations.
5. Small Order Flexibility
Start your journey with a small trial order to experience the superior quality of our products firsthand, ensuring your complete satisfaction before committing to larger volumes.
6. Fast & Timely Delivery
Enjoy the assurance of our rapid and timely delivery services. We guarantee your high-quality products arrive promptly, ensuring your operations remain smooth and uninterrupted.
7. Extensive Authorization
Boost your distribution capabilities with our comprehensive authorization certificates. Confidently market and sell SANZHI brand products, supported by thorough certification.
Sanzhi (Henan) Compressor Co., Ltd is a distinguished and reputable manufacturer specializing in cutting-edge screw air compressors and screw vacuum pumps. With over a decade of unparalleled industry expertise, we offer a versatile and comprehensive product lineup, including normal pressure and low-pressure screw air compressors, permanent magnet frequency conversion screw air compressors, two-stage compression screw air compressors, screw air compressors specifically designed for laser cutting, and single-tank and double-tank mobile screw air compressors. Additionally, we provide electric and diesel mobile screw air compressors, as well as state-of-the-art screw vacuum pumps.
Our state-of-the-art production facility features advanced multi-air compressor assembly lines, ensuring exceptional efficiency and precision. Supported by a dedicated team of over 50 highly skilled employees, we continuously enhance our management systems, such as ERP, to significantly reduce lead times and guarantee the swift delivery of premier quality products.
Our meticulously designed management systems are dedicated to upholding the highest quality standards. Proudly certified under the ISO9001 quality management system, we adhere to rigorous quality control protocols. Each machine undergoes comprehensive inspections at various stages, from material and production checks to pre-delivery evaluations, ensuring unmatched product reliability and excellence.
Our exemplary customer service begins with a pre-sales team that offers expert guidance for selecting the ideal air equipment tailored to diverse facilities. We provide extensive customization options, including appearance and configuration, and create bespoke products to meet specific dealer demands through our OEM services. Our professional sales and service team is always on standby to deliver prompt and efficient post-sales support, ensuring your needs are swiftly addressed.
At Sanzhi (Henan) Compressor Co., Ltd, we are unwavering in our commitment to delivering superior, reliable, and stable products. Dedicated to forging long-term relationships with our clients, we promise efficient delivery, high-quality machinery, and competitive pricing, ensuring you receive the optimal compressed air solution for your requirements.
Located in the picturesque Xinzheng City, Henan Province, China, our factory is conveniently situated just 30 kilometers from Xinzheng International Airport, approximately an hour's drive away. We warmly invite you to visit our facility and experience our exceptional offerings firsthand!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a distinguished manufacturer specializing in screw air compressors, proudly boasting over a decade of industry expertise.
Q2. How do you control quality?
A: 1. Our raw materials undergo rigorous inspection to ensure the highest quality.
2. The meticulous installation process is stringently monitored.
3. Every machine is subjected to a minimum of 5 continuous hours of testing before dispatch to ensure optimal performance.
Q3. What information must I provide to get the suitable machine?
1. Your required air delivery capacity (Unit: CFM or m³/Min).
2. The desired working pressure (Unit: PSI, Bar or Mpa).
3. The voltage and frequency specifications of your country of residence (V/Hz).
4. Any additional accessories needed, such as an air tank, filters, or air dryers.
Share this information with us, and we will tailor a perfect 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 a versatile range of voltages such as 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, 440v/60hz/3p. Additionally, we provide customization options to precisely meet your unique needs.
Q6. How long is the delivery time?
A: For units with standard voltage, delivery is assured within 15 working days after order confirmation. For non-standard requirements, please reach out to our dedicated sales team.
Q7. What's the payment term?
A: Our payment terms are structured as follows: 30% T/T in advance, 40% T/T before shipment, and the remaining 30% T/T upon B/L copy. Payments are accepted in both USD and RMB.
Q8. How about your warranty?
A: We proudly offer a comprehensive warranty: one year for the entire machine and two years for the screw air compressor, excluding consumable spare parts.
Q9. What about the maintenance?
A: Initial maintenance is required after 500 hours of operation. Subsequent maintenance should be carried out every 2000-3000 hours, taking into account the specific working environment.
Q10. Can machines be run in high-temperature environment?
A: Absolutely, our machines are engineered to perform efficiently in high-temperature environments, with an operating range from -20° to 45° (-4ºF to 113ºF).
Q11. Do you offer OEM service?
A: Yes, we specialize in both OEM & ODM services, supported by our expert design team. Custom orders are warmly welcomed.
Q12. How long could your air compressor be used?
A: Our air compressors are meticulously designed for longevity, often exceeding a service life of 10 years.
Q13. Will you provide some spare parts for the machines?
A: Certainly, we offer a comprehensive selection of high-quality spare parts to ensure the seamless and efficient operation of your machinery, thereby extending its lifespan and maintaining peak performance.
Q14. How about your after-sales service?
A: We deliver outstanding after-sales support, including extensive online installation and commissioning guidance. Moreover, we can deploy skilled engineers for on-site training and meticulous installation assistance as needed.
Audited Supplier 
){kind=link}
){kind=link}