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 fusion of pioneering technology and superior performance with Sanzhi's High Efficiency Durable Twin-Stage Screw Air Compressor, designed specifically for industrial use. Harness the power of innovation and ensure your enterprise stands at the forefront of productivity and sustainability.
Internal Structure Frontside
Internal Structure Backside
Working Principle
In an ideal air compression scenario, the energy required for single-stage pressure transmission is equal to the total energy demands of multi-stage compression. However, real-world factors such as power losses from couplings, bearing friction, and cooling effects due to fluid viscosity lead to higher operational power consumption. By reducing the compression ratio at each stage, these inefficiencies are minimized. This results in a lower overall power consumption for multi-stage compression compared to single-stage compression.
Our innovative two-stage screw air compressor boasts a highly sophisticated twin-stage rotary screw configuration. This revolutionary system features an active screw in each stage, driving a passive screw through a durable external power transmission setup. The first stage operates with a low-pressure screw group, while the second stage utilizes a high-pressure screw group. Each screw is precisely enclosed in a sealing air film. During operation, the gas undergoes a three-phase process-suction, pressurization, and exhaust-ensuring exceptional compression efficiency.
First Stage Compression: During the initial stage of our two-stage screw air compressor, 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 screw rotor's high-speed rotation compresses it, seamlessly transferring it to the second stage.
Second Stage Compression: In the second stage screw group, the gas undergoes further compression within a more confined screw space, reaching higher temperatures and pressures. The process concludes as the exhaust valve opens, releasing the high-pressure gases from the system, completing the compression cycle.
Natural air is initially drawn through the air filter into the first compression stage, where it mixes with a small amount of lubricating oil. This mixture is compressed to an intermediate pressure before moving into a cooling channel. Here, 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 final compression to the ultimate exhaust pressure. The fully compressed gas exits the system through the exhaust valve, concluding 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 broader, delivering an efficiency boost of 20-30% over conventional motors. Even when operating away from the rated frequency, the motor maintains 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, 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, minimizing internal leakage from the high-pressure end to the low-pressure end while significantly enhancing volumetric efficiency.
5) Variable frequency start and 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. Delight in a quieter, more efficient working environment and elevate your productivity with the Sanzhi High Efficiency Durable Twin-Stage Screw Air Compressor for Industrial Use.
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 High Efficiency Durable Twin-Stage Screw Air Compressor for Industrial Use.
| 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. Stay ahead in a competitive market with our cost-effective solutions.
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 unmatched reliability.
3. OEM & ODM Services
Unlock the full potential of our extensive production and management capabilities. We offer tailored OEM and ODM services to meet your precise specifications, ensuring your unique needs are meticulously addressed.
4. Customized Solutions
We specialize in catering to non-standard and export orders, meticulously accommodating specific voltage, power, and pressure requirements. Reach out with your customization requests and let us deliver solutions tailored to your exact needs.
5. Small Order Acceptance
Begin your partnership with a small trial order and experience the superior quality of our products firsthand. Ensure complete satisfaction before scaling up with confidence.
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, maintaining smooth and uninterrupted operations.
7. Comprehensive Authorization
Enhance your distribution capabilities with our full authorization certificates. Confidently market and sell SANZHI brand products, backed by comprehensive and robust 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 an extensive range of voltage options tailored to your needs, including 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, and 440v/60hz/3p. We also provide bespoke customization to perfectly suit your unique requirements.
Q6. How long is the delivery time?
A: For our standard voltage units, you can expect delivery within 15 working days following order confirmation. For any non-standard voltage requirements, please get in touch with our dedicated sales team to discuss timely arrangements.
Q7. What's the payment term?
A: Our flexible payment terms include a 30% T/T advance payment, 40% T/T before shipment, and the final 30% T/T upon receiving the B/L copy. We accept payments in both USD and RMB for your convenience.
Q8. How about your warranty?
A: We stand behind our products with a comprehensive warranty-one year for the entire machine and a two-year warranty specifically for the screw air compressor, excluding consumable spare parts.
Q9. What about the maintenance?
A: The initial maintenance of our compressors is recommended after 500 hours of use. Subsequent maintenance should be conducted every 2000 to 3000 hours, depending on the operating conditions and environment.
Q10. Can machines be run in high-temperature environment?
A: Absolutely, our compressors are expertly engineered to function efficiently in high-temperature environments, with an operational range from -20° to 45° (-4ºF to 113ºF).
Q11. Do you offer OEM service?
A: Yes, we specialize in OEM & ODM services, thanks to our professional design team. We welcome custom orders and are committed to bringing your unique visions to life.
Q12. How long could your air compressor be used?
A: Our air compressors are built to last, often delivering over a decade of reliable, high-performance service.
Q13. Will you provide some spare parts for the machines?
A: Certainly, we supply a broad array of premium spare parts to ensure the smooth and efficient operation of your equipment, contributing to its longevity and peak performance.
Q14. How about your after-sales service?
A: We pride ourselves on offering exceptional after-sales support, including comprehensive online installation and commissioning guidance. Additionally, we can dispatch experienced engineers for hands-on training and meticulous installation assistance, ensuring the optimal performance of your equipment.
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