Introducing the groundbreaking Low-Pressure Compressor by Sanzhi (Henan) Compressor Co., Ltd.! This innovative Two-Stage Compression Permanent Magnet Variable Frequency Drive Screw Air Compressor has been meticulously engineered to set new standards of industrial excellence. Available in an extensive range of power options-including 15KW, 22KW, 30KW, 37KW, 45KW, 55KW, 75KW, 90KW, 110KW, 132KW, 160KW, 185KW, 200KW, and 250KW-this versatile powerhouse ensures unmatched efficiency and reliability. Transform your operations with this state-of-the-art solution, expertly designed to meet the diverse and demanding needs of today's dynamic industries.
Internal Structure Frontside
Internal Structure Backside
Working Principle
In an ideal air compression environment, the energy required for single-stage pressure transfer equals the cumulative energy for multi-stage compression. However, real-world factors such as coupling power losses, bearing friction, and fluid viscosity cooling result in increased operational power demands. By lowering the compression ratio per stage, these inefficiencies are significantly reduced. Consequently, the overall power consumption for multi-stage compression is less than that of single-stage compression.
Our state-of-the-art two-stage screw air compressor features a sophisticated twin-stage rotary screw mechanism. This revolutionary system includes an active screw in each stage, driving a passive screw via a robust external power transmission setup. The first stage employs a low-pressure screw group, while the second stage uses 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. Initially, the gas is drawn into the compression chamber via the suction valve, where the high-speed rotation of the screw rotor compresses it before seamlessly transferring it 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 and completing the 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, completing the compression cycle.
1) High Efficiency of PM Motor:Experience unparalleled efficiency with our advanced permanent magnet motor. Boasting a significantly wider constant torque and weak magnetic range, it delivers an impressive 20-30% efficiency boost over conventional motors. Even when operating away from its rated frequency, the motor maintains high efficiency, ensuring consistent optimal performance.
2) Innovative Two-Stage Compression Air End:Our revolutionary two-stage compression screw machine features a uniquely designed air end, which integrates the first and second-stage compression rotors within a single casing and drives them directly by gears. Each rotor achieves optimal linear speed, maximizing compression efficiency.
3) Integrated Frequency Converter:Equipped with China's premier frequency system, this air compressor offers a broad range of speed regulation and high precision. Users can adjust the frequency based on actual gas demand, resulting in remarkable energy savings and enhanced operational efficiency.
4) Minimized Internal Leakage:Our two-stage compression technology reduces the compression ratio for each stage, minimizing internal leakage from the high-pressure end to the low-pressure end, and significantly enhancing volumetric efficiency.
5) Variable Frequency Start and Soft Start:The motor achieves variable frequency start and soft start, significantly reducing the impact on power grid equipment and preventing damage to electrical components.
6) Reduced Energy Consumption:Our frequency conversion system operates from 25% to 100%, a substantial improvement over the ordinary 50% to 100% range. Compared to fixed-speed air compressors, energy savings can exceed 30%. Even against standard variable frequency compressors, it offers around 5% more energy efficiency, especially for systems with fluctuating gas demands.
7) Zero Transmission Loss:The permanent magnet motor and compressor utilize an embedded integrated shaft direct connection structure, making the system more compact. Without couplings or other transmission parts, transmission efficiency reaches an unparalleled 100%.
8) Superior Air Cooling Method:Our highly efficient air cooling method delivers exceptional cooling performance, significantly reducing the temperature of compressed air. This near-isothermal compression 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. The high-precision color electronic screen offers clear graphical displays, maintenance information, fault alarms, and safety shutdown alerts, ensuring seamless operation.
10)Special Type Intake Valve:The 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, combined with high-quality soundproof cotton, minimizes operational vibration and significantly enhances noise reduction, ensuring a quieter, more efficient workspace.
13) Maintenance-Free Motor: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) Advanced Noise Reduction:Experience unparalleled tranquility with the state-of-the-art two-stage compression technology, meticulously engineered by Sanzhi (Henan) Compressor Co., Ltd. This revolutionary system drastically reduces the compression ratio, resulting in a significant decline in operational noise, especially during unloading phases. Enjoy a quieter, more efficient workspace and boost your productivity with the Sanzhi Durable Two-Stage Screw Air Compressor for Industries. Elevate your industrial operations with Sanzhi's superior engineering and innovative design.
15) Effortless Maintenance and Service:Our innovative two-stage compressor unit, expertly crafted by Sanzhi (Henan) Compressor Co., Ltd., maintains the familiar structure and systems of a single-stage compressor, except for the advanced screw air end. This design ensures that maintenance and service remain straightforward and user-friendly. Enjoy hassle-free upkeep and consistent, optimal performance with the Sanzhi Durable Two-Stage Screw Air Compressor for Industries. Trust in Sanzhi for easy maintenance and exceptional, reliable results.
| 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. Competitive Pricing
Experience the pinnacle of value with Sanzhi (Henan) Compressor Co., Ltd. By sourcing directly from us, you unlock factory-direct pricing that ensures your market competitiveness remains unmatched.
2. Direct Transactions
Benefit from streamlined cost-efficiency and the reliability of direct transactions. Our products come straight from the factory to you, guaranteeing optimal savings and dependable service.
3. OEM & ODM Services
Harness the power of our robust production and management facilities. We offer bespoke OEM and ODM services tailored to your exact requirements, ensuring your distinct needs are impeccably met.
4. Customized Solutions
We excel in fulfilling non-standard and export orders, adeptly accommodating specific voltage, power, and pressure specifications. Share your customization needs, and we'll craft solutions that align perfectly with your demands.
5. Small Order Acceptance
Begin your partnership with a small trial order and experience the exceptional quality of our products. Ensure your complete satisfaction before scaling your investment.
6. Rapid Delivery
Relish the assurance of our prompt and efficient delivery services. We prioritize delivering your premium products swiftly to maintain the seamless flow of your operations.
7. Comprehensive Authorization
Boost your distribution potential with our extensive authorization certificates. Confidently market and sell SANZHI brand products, fortified 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. Boasting over a decade of unparalleled industry expertise, we present a versatile and comprehensive product lineup that includes 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 both 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 is subjected to 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 (Henan) Compressor Co., Ltd. offers a versatile and comprehensive range of voltage options to meet global requirements, including 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, and 440v/60hz/3p. We also provide bespoke solutions tailored to perfectly match your specific electrical needs.
Q6. How long is the delivery time?
A: For standard voltage units, we guarantee a swift delivery within 15 working days following order confirmation. If you have non-standard voltage requirements, please contact our dedicated sales team for precise delivery timelines.
Q7. What's the payment term?
A: Our payment terms are designed for your convenience: 30% T/T in advance, 40% T/T before shipment, and the remaining 30% T/T upon receiving the B/L copy. We accept payments in both USD and RMB.
Q8. How about your warranty?
A: Sanzhi stands firmly behind its products with a robust 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 crucial and should be performed after 500 operating hours. Subsequent maintenance intervals are set between 2000-3000 hours, depending on the specific working environment.
Q10. Can machines be run in high-temperature environment?
A: Absolutely! Our machines are engineered for high performance even in extreme temperatures, operating efficiently within a range of -20° to 45° (-4ºF to 113ºF).
Q11. Do you offer OEM service?
A: Yes, we specialize in both OEM and ODM services. Our expert design team is poised to bring your custom orders to life, delivering tailor-made solutions that perfectly align with your specifications.
Q12. How long could your air compressor be used?
A: Engineered for exceptional durability, our air compressors boast a remarkable lifespan, typically exceeding 10 years of reliable service.
Q13. Will you provide some spare parts for the machines?
A: Absolutely, we supply a comprehensive range of high-quality spare parts to ensure your machines operate seamlessly and maintain peak performance over an extended period.
Q14. How about your after-sales service?
A: We offer outstanding after-sales support, including detailed online installation and commissioning guidance. Additionally, we can arrange for skilled engineers to provide hands-on training and meticulous installation assistance if necessary.
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