Introducing the groundbreaking Low-Pressure Compressor, masterfully designed by Sanzhi (Henan) Compressor Co., Ltd.! Experience the pinnacle of industrial innovation with the Two-Stage Compression Permanent Magnet Variable Frequency Drive Screw Air Compressor. This marvel of engineering is poised to set new standards of excellence, offering a versatile range of power options to suit all your professional needs: 15KW, 22KW, 30KW, 37KW, 45KW, 55KW, 75KW, 90KW, 110KW, 132KW, 160KW, 185KW, 200KW, and 250KW. Ensuring unmatched efficiency and reliability, this state-of-the-art solution is meticulously crafted to cater to the diverse and rigorous demands of contemporary industries. Elevate your operations to new heights with this revolutionary compressor, designed to transform and enhance your industrial capabilities.
Internal Structure Frontside
Internal Structure Backside
Working Principle
In the realm of air compression, the ideal scenario proposes that the energy needed for single-stage pressure transmission closely aligns with the cumulative energy of multi-stage compression. However, real-world factors such as coupling power losses, bearing friction, and fluid viscosity's cooling effects drive up operational power demands. By minimizing the compression ratio at each stage, these inefficiencies are reduced. Consequently, total power consumption for multi-stage compression proves to be more efficient and lower than single-stage compression.
Introducing our innovative two-stage screw air compressor, equipped with a state-of-the-art twin-stage rotary screw mechanism. This revolutionary setup includes an active screw in each stage, energetically driving a passive screw via a strong external power transmission system. The first stage involves a low-pressure screw group, followed by the second stage with a high-pressure screw group. Each screw is precisely encased within a sealing air film. During operation, the gas undergoes a comprehensive tri-phase process of suction, pressurization, and exhaust, delivering unmatched compression efficiency.
First Stage Compression: At the onset of compression in our two-stage screw air compressor, gas is expertly compressed using a low-pressure screw group. Initially drawn into the compression chamber through the suction valve, the high-speed rotation of the screw rotor efficiently compresses the gas, preparing it for seamless transition to the second stage.
Second Stage Compression: Within the second stage screw group, the gas undergoes further compression in a more confined screw space, resulting in heightened temperatures and pressures. This process culminates with the opening of the exhaust valve, allowing the high-pressure gases to exit the system and complete the compression cycle.
Natural air is first drawn through the air filter into the initial compression stage, where it mixes with a modest amount of lubricating oil. This blend is compressed to an intermediary pressure before moving into a cooling channel. Here, the gas interacts with a substantial oil mist, significantly reducing its temperature. The cooled, compressed gas then proceeds to the second-stage rotor for its final compression to the ultimate exhaust pressure. The fully compressed gas exits the system through the exhaust valve, marking the completion of the compression cycle.
1) High efficiency of PM motor:Discover exceptional efficiency with our cutting-edge permanent magnet motor. Enhanced with an expansive constant torque and magnetic range, it outperforms conventional motors by a remarkable 20-30%. Even when operating away from its rated frequency, the motor maintains peak efficiency, ensuring optimal performance is achieved consistently.
2) Two-stage compression unique air end:Introducing our groundbreaking two-stage compression screw machine, featuring an ingeniously crafted air end. The combined first and second-stage compression rotors, housed within a unified casing and gear-driven, enable optimal linear speeds for each rotor, thus maximizing compression efficiency to unprecedented levels.
3) Integrated frequency converter: With China's foremost frequency system onboard, our air compressor offers an extensive speed regulation range with impressive precision. Users can precisely adjust the frequency to suit actual gas demands, leading to substantial energy conservation and enhanced operational efficiency.
4) Reduce internal leakage:Utilizing advanced two-stage compression technology, we effectively lower the compression ratio for each stage. This innovation minimizes internal leakage from high to low-pressure ends and significantly boosts volumetric efficiency, setting new benchmarks for performance.
5) Variable frequency start and the soft startof the motor are seamlessly implemented, drastically minimizing the impact on power grid equipment and safeguarding electrical components from potential damage.
6) Reduce energy consumption: Our dynamic frequency conversion operates from 25% to 100%, a notable advancement from the usual 50% to 100% range. Compared to fixed-speed air compressors, our solution can yield energy savings exceeding 30%. Even against standard variable frequency compressors, it offers around 5% more efficiency, with greater savings for systems with variable gas demands.
7) No transmission loss: The synergy between our permanent magnet motor and compressor through an integrated shaft direct connection design ensures utmost compactness. Without couplings or other transmission parts, this design achieves an extraordinary transmission efficiency of 100%.
8) Air cooling method: Our superior energy-efficient air cooling methodology offers exceptional cooling performance, significantly lowering the temperature of compressed air. This near-isothermal compression reduces pressure loss between stages, lowers the compression ratio, and enhances overall system efficiency.
9)Smart Touch Controller: Embrace the future of convenience with our state-of-the-art smart touch controller. Minimal manual intervention is required thanks to its high-precision color electronic screen, which provides lucid graphical displays, maintenance information, fault alarms, and safety shutdown alerts, streamlining operations effortlessly.
10)Special Type Intake Valve:With an automatically controlled opening, it ensures seamless engine fuel injection and lubricating oil circulation.
The ultra-low oil circuit loss significantly boosts overall efficiency.
In emergencies, the normally open solenoid valve automatically closes to prevent oil injection, ensuring the utmost system safety.
11)Excellent Air Filter:Our premium air filter excels in air purification, guaranteeing a pristine air system with its comprehensive three-stage filtration for superior air quality. It effectively eliminates steam and dust, satisfying even the most stringent emission standards.
12)High-Quality Soundproof Cotton:Our sophisticated noise reduction housing, combined with top-tier soundproof cotton, minimizes operational vibrations and significantly enhances noise reduction, ensuring a quieter, more efficient workspace.
13) Motor maintenance-free:Our permanent magnet motor, devoid of internal bearings, negates the necessity for motor bearing maintenance and replacement, thereby cutting long-term maintenance expenses and boosting reliability.
14) Noise reduction:Immerse yourself in the ultimate serenity offered by our state-of-the-art two-stage compression technology. This advanced system expertly minimizes the compression ratio, significantly reducing operational noise levels, particularly during unloading phases. Revel in a quieter, more efficient work setting and enhance your productivity effortlessly with the Professional Industrial Screw Compressor, a remarkable creation by Sanzhi.
15) Effortless Maintenance and Service:Our pioneering two-stage compressor unit ingeniously retains the well-known structure and systems of a single-stage compressor. By merely omitting the screw air end, we ensure maintenance and service remain straightforward and accessible for all. Experience seamless upkeep and enjoy consistent, peak 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
Partner with us to experience extraordinary value. By choosing Sanzhi (Henan) Compressor Co., Ltd., you tap into unrivaled factory-direct pricing, positioning you ahead in a competitive marketplace.
2. Direct Transactions
Benefit from optimal cost-efficiency and the security of direct transactions. Our products come straight from the factory to you, ensuring maximum savings and dependability.
3. OEM & ODM Services
Harness the power of our vast production and management expertise. We offer customized OEM and ODM services that align with your exact specifications, fulfilling your distinct needs with precision.
4. Customized Solutions
Specializing in non-standard and export orders, we adjust to specific voltage, power, and pressure requirements. Contact us with your customization requests, and we'll provide solutions that meet your demands perfectly.
5. Small Order Acceptance
Start your partnership with a small trial order to directly experience the exceptional quality of our offerings, ensuring your satisfaction before expanding your orders.
6. Rapid Delivery
Relish in the assurance that comes with our fast, efficient delivery services. We guarantee your premium products arrive on time, ensuring the seamless continuation of your operations.
7. Comprehensive Authorization
Boost your distribution prowess with our complete authorization certificates. Confidently market and sell SANZHI brand products, supported by all-encompassing certification.
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 unmatched industry expertise, we showcase 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 laser-cutting specific screw air compressors. Our range also boasts single-tank and double-tank mobile screw air compressors, alongside both electric and diesel mobile screw air compressors, as well as state-of-the-art screw vacuum pumps.
Our state-of-the-art production facility hosts advanced multi-air compressor assembly lines, ensuring remarkable efficiency and precision. Backed by a devoted team of over 50 highly skilled employees, we consistently refine our management systems such as ERP, to drastically shorten lead times and assure the rapid delivery of top-notch quality products.
Our meticulously crafted management systems are committed to maintaining the highest quality standards. Proudly certified under the ISO9001 quality management system, we adhere to strict quality control protocols. Every machine undergoes thorough inspections at various stages, from material checks to production assessments and pre-delivery evaluations, guaranteeing unparalleled product reliability and excellence.
Our exemplary customer service starts with a pre-sales team offering expert guidance to select the ideal air equipment customized for diverse facilities. We offer 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 provide prompt and efficient post-sales support, ensuring your needs are immediately addressed.
At Sanzhi (Henan) Compressor Co., Ltd, we are steadfast in our commitment to delivering superior, reliable, and stable products. Dedicated to fostering long-term relationships with our clients, we assure efficient delivery, high-quality machinery, and competitive pricing, ensuring you receive the optimal compressed air solution for your needs.
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 is proud to present a versatile array of voltage options tailored to your unique needs, including 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, and 440v/60hz/3p. Customize your equipment effortlessly to perfectly suit your specific applications.
Q6. How long is the delivery time?
A: Enjoy rapid fulfillment with standard voltage units, dispatched within 15 working days upon order confirmation. For bespoke configurations, our dedicated sales team is ready to assist you with tailored delivery solutions.
Q7. What's the payment term?
A: Flexible payment terms are available with an initial 30% T/T in advance, followed by 40% T/T before shipment, and a final 30% T/T post-B/L copy. We accommodate transactions in both USD and RMB for your convenience.
Q8. How about your warranty?
A: Benefit from our all-inclusive warranty package: one year coverage for the entire machine and an extended two-year warranty for the screw air compressor, with the exception of consumable spare parts, ensuring peace of mind and reliable performance.
Q9. What about the maintenance?
A: Initiate maintenance at 500 operational hours, then maintain optimal performance with subsequent servicing every 2000-3000 hours. Adapt your maintenance schedule based on actual working conditions for maximum efficiency.
Q10. Can machines be run in high-temperature environment?
A: Absolutely, our machines excel in high-temperature environments, designed to function smoothly within a broad temperature range from -20° to 45° (-4ºF to 113ºF), ensuring consistent performance under demanding conditions.
Q11. Do you offer OEM service?
A: Indeed, we specialize in OEM & ODM services, supported by our expert design team. Bring your custom visions to life with our highly welcomed bespoke orders and exceptional design capabilities.
Q12. How long could your air compressor be used?
A: Our air compressors are meticulously crafted for durability and longevity, typically offering over a decade of reliable service life, ensuring sustained performance and value.
Q13. Will you provide some spare parts for the machines?
A: Certainly, we provide a comprehensive selection of top-quality spare parts, ensuring your machinery operates seamlessly and efficiently for extended periods, maximizing longevity and peak functionality.
Q14. How about your after-sales service?
A: Experience exceptional after-sales service with our thorough online installation and commissioning support. Additionally, benefit from our skilled engineers' onsite training and precise installation assistance whenever necessary, ensuring optimal operation.
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