Introducing the groundbreaking Low-Pressure Compressor by Sanzhi (Henan) Compressor Co., Ltd.! Step into the future of industrial excellence with our innovative Two-Stage Compression Permanent Magnet Variable Frequency Drive Screw Air Compressor. This masterpiece of engineering has been meticulously designed to transform the landscape of industrial performance. With a diverse array of power options ranging from 15KW to a formidable 250KW (including 15KW, 22KW, 30KW, 37KW, 45KW, 55KW, 75KW, 90KW, 110KW, 132KW, 160KW, 185KW, 200KW, and 250KW), this adaptable marvel ensures exceptional efficiency and steadfast reliability. Elevate your operational capabilities with this cutting-edge solution, expertly crafted to fulfill the varied and challenging demands of contemporary industries worldwide.
Internal Structure Frontside
Internal Structure Backside
Working Principle
In an optimal air compression scenario, the energy needed for single-stage pressure transmission balances the cumulative energy requirements of multi-stage compression. However, in practical applications, various factors such as coupling power losses, bearing friction, and cooling fluid viscosity influence increased operational power demands. By reducing the compression ratio across each stage, these inefficiencies are minimized. As a result, the overall power consumption for multi-stage compression is typically lower compared to single-stage compression.
Our state-of-the-art two-stage screw air compressor is equipped with a highly sophisticated twin-stage rotary screw design. This revolutionary system comprises an active screw in each stage, which drives a passive screw through a durable external power transmission mechanism. The first stage utilizes a low-pressure screw assembly, while the second stage employs a high-pressure screw assembly. Each screw is precisely housed within a sealing air film. Throughout operation, the gas undergoes a comprehensive tri-phase process including suction, pressurization, and exhaust, delivering unmatched compression efficiency.
First Stage Compression: In the initial stage of our two-stage screw air compressor, gas is effectively compressed using a low-pressure screw assembly. The gas is first drawn into the compression chamber via the suction valve, where the rapid rotation of the screw rotor compresses it before smoothly transferring it to the second stage.
Second Stage Compression: Within the second-stage screw assembly, gas is further compacted within a more restricted screw space, reaching enhanced temperatures and pressures. The cycle concludes as the exhaust valve opens, allowing the release of high-pressure gases from the system and completing the compression cycle.
Ambient air is initially channeled through the air filter into the first compression stage, where it combines with a small quantity of lubricating oil. This mixture undergoes compression to an intermediate pressure. Subsequently, the gas passes through a cooling channel, interacting with a substantial amount of oil mist to dramatically reduce its temperature. The cooled, compressed gas then proceeds to the second-stage rotor for final compression, culminating in the ultimate exhaust pressure. The fully compressed gas then exits the system through the exhaust valve, completing the comprehensive compression cycle.
1) High efficiency of PM motor:Experience the pinnacle of efficiency with our cutting-edge permanent magnet motor. It boasts an expansive constant torque and weak magnetic range, increasing efficiency by a remarkable 20-30% compared to traditional motors. The motor maintains its high-efficiency performance across variable frequencies, ensuring optimal functionality under all operating conditions.
2) Two-stage compression unique air end:Discover innovation with our state-of-the-art two-stage compression screw machine, featuring a uniquely engineered air end. The first and second-stage compression rotors are ingeniously merged within a single casing and driven directly by gears, allowing for each rotor to achieve its ideal linear speed, thereby optimizing compression efficiency to unprecedented levels.
3) Integrated frequency converter: Harnessing the prowess of China's leading frequency modulation system, this air compressor offers an extensive speed regulation range with exceptional precision. Users can fine-tune the frequency to match real-time gas demands, resulting in astonishing energy savings and superior operational efficiency.
4) Reduce internal leakage:Our two-stage compression technology smartly reduces the compression ratio for each stage, thereby minimizing internal leakage from high-pressure to low-pressure ends and dramatically boosting volumetric efficiency.
5) Variable frequency start and the soft startof the motor are seamlessly achieved, significantly diminishing stress on power grid equipment and safeguarding electrical components from damage.
6) Reduce energy consumption: Our advanced frequency conversion system operates impressively from 25% to 100%, far superior to the conventional 50% to 100% range. This results in energy savings surpassing 30% compared to fixed-speed air compressors and offers approximately 5% more energy efficiency than standard variable frequency compressors, especially beneficial for systems with fluctuating gas demands.
7) No transmission loss: The ingenious integrated shaft direct connection between the permanent magnet motor and compressor eliminates couplings and transmission parts, achieving a flawless 100% transmission efficiency with a compact design.
8) Air cooling method: Our cutting-edge air cooling method offers exceptional cooling performance, drastically reducing the compressed air temperature. This approach closely mimics isothermal compression, minimizing pressure loss between stages and reducing the compression ratio, significantly enhancing overall efficiency.
9)Smart Touch Controller:Our advanced built-in intelligence system requires minimal manual intervention. With a high-precision color electronic screen, it provides clear, graphical displays, maintenance updates, fault alarms, and safety shutdown alerts, ensuring seamless operation and user convenience.
10)Special Type Intake Valve:The intelligently controlled opening facilitates smooth engine fuel injection and lubricating oil circulation.
Ultra-low oil circuit loss enhances overall efficiency.
The normally open solenoid valve automatically secures during emergency stops to prevent oil injection, ensuring system safety and reliability.
11)Excellent Air Filter:Our premium air filter provides outstanding air purification with a robust three-stage filtration system, guaranteeing superior air quality by effectively eliminating steam and dust, meeting rigorous emission standards with ease.
12)High-Quality Soundproof Cotton:The thoughtfully designed compact noise reduction housing, paired with superior soundproof cotton, minimizes operational vibration and drastically reduces noise levels, fostering a quieter, more productive workspace.
13) Motor maintenance-free:Our pioneering permanent magnet motor, devoid of internal bearings, negates the need for motor bearing maintenance and replacement, cutting down long-term maintenance costs and bolstering reliability.
14) Noise reduction:Experience the epitome of serenity with Sanzhi's cutting-edge two-stage compression technology. This state-of-the-art system ingeniously decreases the compression ratio, thereby significantly minimizing operational noise, even during the unloading phases. Revel in a quieter, more efficient workplace and boost your productivity to new heights with the Professional Industrial Screw Compressor by Sanzhi.
15) Effortless Maintenance and Service:Our trailblazing two-stage compressor unit is designed to preserve the familiar architecture and functionality of a single-stage compressor. By merely eliminating the screw air end, we ensure that maintenance and service processes remain effortless and intuitive. Enjoy seamless upkeep and experience consistent, optimal performance with Sanzhi's Professional Industrial Screw 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 unparalleled value when you partner with us. By directly sourcing from Sanzhi (Henan) Compressor Co., Ltd., you open the door to unbeatable factory-direct prices. This ensures that you stay at the cutting edge of market competition.
2. Direct Transactions
Benefit from enhanced cost-efficiency and the confidence that comes with direct transactions. Our products come straight from the factory to your hands, guaranteeing maximum savings and reliability.
3. OEM & ODM Services
Harness the power of our expansive production and management prowess. We offer bespoke OEM and ODM services tailored to your exact specifications, ensuring that your unique requirements are fully met with precision.
4. Customized Solutions
Our expertise lies in catering to non-standard and export orders, accommodating specialized voltage, power, and pressure needs. Contact us with your customization requests and allow us to craft solutions that fit your specific needs seamlessly.
5. Small Order Acceptance
Begin your partnership with a small trial order to experience the superior quality of our offerings firsthand. This ensures complete satisfaction and confidence before scaling up your orders.
6. Rapid Delivery
Revel in the assurance provided by our swift and efficient delivery services. We ensure that your premium products are delivered promptly, keeping your operations running smoothly without interruption.
7. Comprehensive Authorization
Elevate your distribution capabilities with our complete authorization certificates. Market and sell SANZHI brand products with confidence, knowing you are backed by full and comprehensive certification.
Sanzhi (Henan) Compressor Co., Ltd is a renowned and trusted manufacturer at the forefront of innovation in screw air compressors and vacuum pumps. With over ten years of unrivaled industry experience, we offer a versatile and comprehensive array of products. Our range includes both normal and low-pressure screw air compressors, cutting-edge permanent magnet frequency conversion screw compressors, and advanced two-stage compression screw air compressors. We also specialize in laser cutting screw air compressors and mobile units available in single-tank and double-tank configurations. Our offerings extend to both electric and diesel mobile screw air compressors, alongside state-of-the-art screw vacuum pumps.
Our cutting-edge production facility boasts advanced multi-air compressor assembly lines, ensuring premier efficiency and precision in our manufacturing process. With a dedicated team of over 50 highly skilled professionals, we are constantly enhancing our management systems, such as ERP, to dramatically reduce lead times and guarantee the rapid delivery of top-tier quality products.
Our meticulously crafted management systems are committed to maintaining the pinnacle of quality standards. Proudly accredited with ISO9001 certification, we adhere to stringent quality control protocols. Every machine undergoes thorough inspections at multiple stages-from material and production checks to pre-delivery evaluations-ensuring exceptional product reliability and unmatched excellence.
Our exemplary customer service begins with a pre-sales team that provides expert guidance for selecting the perfect air equipment tailored to a wide variety of facilities. We offer extensive customization options, including appearance and configuration modifications, and craft bespoke products to meet specific dealer requirements through our OEM services. Our professional sales and service team is always ready to deliver prompt and efficient post-sales support, ensuring your needs are addressed with speed and precision.
At Sanzhi (Henan) Compressor Co., Ltd, we are steadfast in our dedication to providing superior, reliable, and stable products. Committed to building lasting relationships with our clients, we guarantee efficient delivery, high-quality machinery, and competitive pricing, ensuring you receive the utmost in compressed air solutions for your needs.
Nestled in the scenic Xinzheng City of Henan Province, China, our factory is conveniently located just 30 kilometers from Xinzheng International Airport, about an hour's drive away. We warmly welcome you to visit our facility and witness our exceptional offerings firsthand!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a distinguished manufacturer specializing in screw air compressors, with over a decade of esteemed industry expertise.
Q2. How do you control quality?
A: 1. Our raw materials undergo meticulous inspections to ensure the highest quality standards.
2. The installation process is monitored with stringent precision.
3. Each machine is subjected to a rigorous minimum of 5 continuous hours of testing prior to dispatch, ensuring 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 the 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 array of voltage options to suit diverse needs, including 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, and 440v/60hz/3p. Plus, we provide customization to align perfectly with your specific requirements.
Q6. How long is the delivery time?
A: For our standard voltage units, expect prompt delivery within just 15 working days following order confirmation. For non-standard specifications, we invite you to consult with our dedicated sales team for precise scheduling.
Q7. What's the payment term?
A: Our flexible payment terms include 30% T/T upfront, 40% T/T before shipment, and the remaining 30% T/T upon receiving the B/L copy. Transactions can be conducted in both USD or RMB for your convenience.
Q8. How about your warranty?
A: We provide an all-encompassing warranty: one year for the complete machine and an extended two-year warranty for the screw air compressor, excluding consumable spare parts-ensuring peace of mind.
Q9. What about the maintenance?
A: Commence the initial maintenance after 500 hours of operation. Thereafter, conduct routine maintenance every 2000-3000 hours, considering the specific working conditions to optimize performance.
Q10. Can machines be run in high-temperature environment?
A: Absolutely. Our machines are expertly crafted to function optimally even in high-temperature settings, withstanding a wide range of temperatures from -20° to 45° (-4ºF to 113ºF).
Q11. Do you offer OEM service?
A: Certainly, we specialize in OEM & ODM services, supported by our talented design team. We warmly welcome your custom orders to turn your vision into reality.
Q12. How long could your air compressor be used?
A: Our air compressors are designed with durability in mind, consistently delivering reliable performance for over a decade.
Q13. Will you provide some spare parts for the machines?
A: Certainly, we supply a wide array of top-quality spare parts to ensure your machines run smoothly and effectively for extended periods, maintaining peak operational efficiency.
Q14. How about your after-sales service?
A: We offer outstanding after-sales support, which includes thorough online installation and commissioning guidance. Additionally, we can deploy skilled engineers for onsite training and precise installation support when needed.
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