Unveiling 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 is crafted with precision to redefine industrial excellence. Offered in a comprehensive spectrum of power options - ranging from 15KW up to a robust 250KW - this adaptable titan provides unparalleled efficiency and reliability. Elevate your operations with this avant-garde solution, meticulously created to cater to the varied and rigorous demands of modern dynamic industries.
Internal Structure Frontside
Internal Structure Backside
Working Principle
In the realm of air compression, a perfectly optimized environment demands that the energy required for a single-stage compression matches the cumulative energy of multi-stage compressions. However, practical scenarios introduce variables such as coupling power losses, bearing friction, and fluid viscosity cooling, all contributing to increased power demands. By strategically minimizing the compression ratio for each stage, these inefficiencies are effectively curtailed. This results in a noteworthy reduction in total power consumption for multi-stage compression over its single-stage counterpart.
Introducing our cutting-edge two-stage screw air compressor, a marvel of engineering that features a highly advanced twin-stage rotary screw mechanism. This trailblazing system operates with an active screw in each stage, which drives a passive screw through a vigorous external power transmission arrangement. The initial stage is powered by a low-pressure screw assembly, while the subsequent stage capitalizes on a high-pressure screw assembly. Each screw is expertly enveloped in a sealing air film, ensuring optimal performance. Throughout its operation, the gas is subjected to a tri-phase process-suction, pressurization, and exhaust-guaranteeing unmatched compression efficiency.
First Stage Compression: At the commencement of our sophisticated two-stage screw air compressor's operation, gas is adeptly compressed through a low-pressure screw assembly. The process begins as the gas is drawn into the compression chamber via the suction valve, where the rapid rotation of the screw rotor compresses it effectively before seamlessly transitioning it to the subsequent stage.
Second Stage Compression: The subsequent stage involves a more refined compression by the second stage screw assembly, where the gas is further compressed within a compact screw chamber, reaching elevated temperatures and pressures. This process reaches its zenith as the exhaust valve opens, releasing the high-pressure gases and concluding the compression cycle with precision.
The journey of natural air begins as it is drawn through the air filter into the first compression stage, where it combines with a modest amount of lubricating oil. This mixture undergoes compression to an intermediate pressure level, after which it transits into a cooling channel. Here, it encounters a substantial volume of oil mist, which significantly reduces its temperature. This cooled, compressed gas then progresses to the second-stage rotor, where it undergoes its ultimate compression to reach the final exhaust pressure. The fully compressed gas gracefully exits the system through the exhaust valve, completing the compression cycle with finesse.
1) High efficiency of PM motor:Discover the pinnacle of efficiency with our cutting-edge permanent magnet motor. Its expanded constant torque and weak magnetic ranges deliver a remarkable 20-30% efficiency increase over traditional motors. Even when deviating from the rated frequency, this motor maintains peak efficiency, ensuring incomparable performance round-the-clock.
2) Two-stage compression unique air end:Our groundbreaking two-stage compression screw machine boasts a uniquely engineered air end. By seamlessly integrating the first and second-stage compression rotors within a unified casing and driving them directly with gears, each rotor achieves its optimal linear speed, maximizing compression efficiency like never before.
3) Integrated frequency converter: Equipped with China's top-tier frequency control system, our air compressor offers exceptional speed regulation and precision. Users can customize frequency settings to match actual gas demands, leading to impressive energy savings and superior operational efficiency.
4) Reduce internal leakage:Embrace our two-stage compression technology, which diminishes the compression ratio for each stage, effectively minimizing internal leakage from high-pressure to low-pressure ends and significantly boosting volumetric efficiency.
5) Variable frequency start and the soft startof the motor are realized, dramatically lessening the impact on power grid equipment and safeguarding electrical components.
6) Reduce energy consumption: Our innovative frequency conversion system operates across a dynamic 25% to 100% range, outshining the standard 50% to 100% spectrum. Compared to fixed-speed air compressors, energy savings exceed 30%. It even offers around 5% more efficiency over standard variable frequency models, with pronounced savings for systems experiencing fluctuating gas demands.
7) No transmission loss: The integration of the permanent magnet motor and compressor through an embedded integrated shaft direct connection makes it exceptionally compact. By eliminating couplings and other transmission components, the transmission efficiency achieves an unrivaled 100%.
8) Air cooling method: Our highly efficient air cooling method provides exceptional cooling performance, drastically lowering the temperature of compressed air. This near-isothermal compression minimizes pressure loss between stages, reducing the compression ratio and significantly enhancing overall efficiency.
9)Smart Touch Controller:Our advanced built-in intelligence requires minimal manual intervention. With a high-precision color electronic screen, it offers clear graphical displays, maintenance insights, fault alerts, and safety shutdown notifications, ensuring seamless operation.
10)Special Type Intake Valve:Automatically controlled opening guarantees smooth engine fuel injection and lubricating oil circulation. Ultra-low oil circuit loss further boosts overall efficiency. The normally open solenoid valve automatically shuts during emergency stops to prevent oil injection, safeguarding system integrity.
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 premium air filter offers outstanding air purification, guaranteeing a pristine air system with three-stage filtration for optimal air quality. It effectively removes steam and dust, adhering to rigorous emission standards.
12)High-Quality Soundproof Cotton:Our compact noise reduction housing, combined with top-quality soundproof cotton, minimizes operational vibration and significantly reduces noise, ensuring a quieter and more efficient workspace.
13) Motor maintenance-free:Our permanent magnet motor, devoid of internal bearings, eliminates the necessity for motor bearing maintenance and replacement, cutting long-term maintenance expenses and elevating reliability.
14) Noise reduction:Experience incomparable serenity with the cutting-edge two-stage compression technology meticulously crafted by Sanzhi (Henan) Compressor Co., Ltd. This revolutionary system dramatically lowers the compression ratio, leading to a notable reduction in operational noise, especially during unloading phases. Embrace a quieter, more efficient working atmosphere and amplify your productivity with the Sanzhi Robust Industrial Two-Stage Permanent Magnet VFD Screw Compressor for Heavy Duty Use. Transform your industrial operations with Sanzhi's unmatched engineering excellence.
15) Effortless Maintenance and Service:Our pioneering two-stage compressor unit, expertly engineered by Sanzhi (Henan) Compressor Co., Ltd., maintains the recognizable structure and systems of a single-stage compressor, differing only at the screw air end. This design ensures that maintenance and servicing are straightforward and user-friendly. Benefit from seamless upkeep and continued optimal performance with the Sanzhi Robust Industrial Two-Stage Permanent Magnet VFD Screw Compressor for Heavy Duty Use. Depend on Sanzhi for effortless maintenance and outstanding 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
Elevate your business with the extraordinary value offered by Sanzhi (Henan) Compressor Co., Ltd. Gain the advantage of factory-direct pricing by partnering with us, enabling you to maintain a competitive edge in the market like never before.
2. Direct Transactions
Enjoy the dual benefits of cost-effectiveness and trustworthiness through our direct transaction model. Receive products directly from our factory, ensuring not only significant savings but also dependable and robust service.
3. OEM & ODM Services
Leverage our outstanding production capabilities and strategic management facilities. We provide bespoke OEM and ODM services meticulously crafted to align with your specific requirements, guaranteeing that your unique needs are flawlessly fulfilled.
4. Customized Solutions
Our expertise shines in executing non-standard and export orders with precision, accommodating your unique voltage, power, and pressure criteria. Present your customization requests, and we'll deliver solutions perfectly tailored to your specifications.
5. Small Order Acceptance
Explore the quality of our offerings with an initial small trial order. Experience the superior craftsmanship of our products firsthand and ensure total satisfaction before expanding your investment scope.
6. Rapid Delivery
Experience peace of mind with our reliable and swift delivery services. We are committed to delivering your high-quality products promptly to ensure your operations continue without interruption.
7. Comprehensive Authorization
Enhance your market reach with our thorough authorization certifications. Market and distribute the SANZHI brand with confidence, backed by our comprehensive certification support.
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 present 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, and screw air compressors specifically designed for laser cutting. Our offerings also encompass both single-tank and double-tank mobile screw air compressors, 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.
Nestled in the picturesque Xinzheng City, Henan Province, China, our factory is conveniently located 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. provides an extensive array of voltage options designed to meet global preferences. Our offerings include 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, and 440v/60hz/3p. We excel in crafting customized solutions that align seamlessly with your specific electrical requirements.
Q6. How long is the delivery time?
A: For units operating on standard voltage, we promise prompt delivery within 15 working days following the confirmation of your order. If your needs include non-standard voltage systems, please contact our dedicated sales team for precise delivery schedules tailored to your specifications.
Q7. What's the payment term?
A: Our payment plans are designed with your convenience in mind: a 30% T/T initial deposit, 40% T/T pre-shipment, and the concluding 30% T/T upon receipt of the B/L copy. We facilitate transactions in both USD and RMB.
Q8. How about your warranty?
A: Sanzhi proudly supports its products with a comprehensive warranty: a full year for the entire machine and an extended two years for the screw air compressor, excluding consumable spare parts.
Q9. What about the maintenance?
A: Initial maintenance is essential and should occur after 500 hours of operation. Follow-up maintenance intervals are recommended between 2000-3000 hours, tailored to the specific working conditions.
Q10. Can machines be run in high-temperature environment?
A: Absolutely! Our machines are designed for exceptional performance, even in challenging conditions, efficiently operating within a temperature range of -20° to 45° (-4ºF to 113ºF).
Q11. Do you offer OEM service?
A: Yes, we are adept in offering both OEM and ODM services. Our expert design team is poised to transform your custom orders into reality, providing tailor-made solutions that perfectly meet your specifications.
Q12. How long could your air compressor be used?
A: Designed for durability, our air compressors are known for their outstanding longevity, with a typical service life exceeding 10 years of consistent reliability.
Q13. Will you provide some spare parts for the machines?
A: Absolutely, we offer a vast array of high-quality spare parts to ensure your machines operate smoothly and maintain peak performance over the long term.
Q14. How about your after-sales service?
A: Our after-sales service is exceptional, featuring comprehensive online installation and commissioning guidance. Additionally, we can deploy skilled engineers for hands-on training and meticulous installation assistance when required.
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