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.
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 initially drawn into the compression chamber via the suction valve, where the high-speed rotation of the screw rotor compresses it before it is transferred seamlessly 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. 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 the epitome of tranquility and efficiency with Sanzhi's state-of-the-art two-stage compression technology. Our advanced system significantly lowers the compression ratio, resulting in an exceptional reduction in operational noise, particularly during unloading phases. Revel in a quieter and more productive work environment, and elevate your industrial capabilities with the Sanzhi Heavy Duty High Capacity Two-Stage Screw Air Compressor.
15) Effortless Maintenance and Service:Our groundbreaking two-stage compressor unit maintains the familiar structure and systems of traditional single-stage compressors, simplifying your experience. By only modifying the screw air end, we ensure maintenance and service remain straightforward and user-friendly, even for those new to the technology. Enjoy seamless upkeep and reliable, top-tier performance with Sanzhi's Heavy Duty High Capacity Two-Stage 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. Competitive Pricing
Experience exceptional value by partnering with us. By sourcing directly from Sanzhi (Henan) Compressor Co., Ltd., you gain access to unbeatable factory-direct prices, keeping you at the forefront of a competitive market.
2. Direct Transactions
Capitalize on enhanced cost-efficiency and the assurance of direct transactions. All our offerings are supplied directly from the factory to you, ensuring maximum savings and reliability.
3. OEM & ODM Services
Unlock the potential of our extensive production and management capabilities. We provide tailored OEM and ODM services to meet your precise specifications, ensuring your unique needs are perfectly addressed.
4. Customized Solutions
We specialize in catering to non-standard and export orders, accommodating specific voltage, power, and pressure requirements. Reach out with your customization requests and let us deliver solutions that perfectly match your needs.
5. Small Order Acceptance
Initiate your engagement with a small trial order and witness the superior quality of our products firsthand, ensuring complete satisfaction before scaling up.
6. Rapid Delivery
Enjoy the peace of mind that comes with our swift and timely delivery services. We ensure your high-quality products are delivered promptly, keeping your operations smooth and uninterrupted.
7. Comprehensive Authorization
Enhance your distribution capabilities with our full authorization certificates. Confidently market and sell SANZHI brand products, backed by comprehensive 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 proudly offers a versatile range of voltage options, including 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, and 440v/60hz/3p. We also provide customizable solutions tailored to meet your unique specifications.
Q6. How long is the delivery time?
A: For units with standard voltage, we guarantee delivery within 15 working days post order confirmation. For customized voltage requirements, please reach out to our dedicated sales team for precise timelines.
Q7. What's the payment term?
A: Our payment terms include 30% T/T in advance, 40% T/T before shipment, and the final 30% T/T upon receipt of the B/L copy. Payments are accepted in both USD and RMB.
Q8. How about your warranty?
A: We provide a robust warranty of one year for the entire machine and an extended two-year warranty 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 performed every 2000-3000 hours, considering the actual working conditions.
Q10. Can machines be run in high-temperature environment?
A: Absolutely! Our machines are engineered to operate efficiently in high-temperature environments, with a working temperature 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 professional design team. We welcome all custom orders with enthusiasm.
Q12. How long could your air compressor be used?
A: Our air compressors are designed for exceptional durability, typically providing over 10 years of reliable service.
Q13. Will you provide some spare parts for the machines?
A: Certainly. We offer a comprehensive selection of premium spare parts to ensure the seamless and efficient operation of your machinery, maximizing longevity and performance.
Q14. How about your after-sales service?
A: We provide outstanding after-sales support, which includes detailed online installation and commissioning guidance. Additionally, we can dispatch expert engineers for hands-on training and meticulous installation assistance as needed.
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