Unleash unparalleled industrial prowess with the Large Power Oil-Lubricated Screw-Compressor from China's premier supplier, Sanzhi (Henan) Compressor Co., Ltd. Benefit from factory-direct pricing on this cutting-edge Permanent Magnet Variable Frequency Two-Stage Screw Air Compressor, meticulously designed for exceptional energy savings and superior efficiency. Featuring top-tier High-Quality Centrifugal Fans, this stationary compressor establishes a new benchmark in reliability and performance, tailored for the most demanding applications. Experience the epitome of engineering excellence with Sanzhi's flagship offering, ensuring robust, long-lasting, and economical operation for all your industrial needs.
Internal Structure Frontside
Internal Structure Backside
Working Principle
In an ideal air compression scenario, the power needed for single-stage pressure transmission equals the cumulative power needed for multi-stage compression. However, real-world operations face increased power demands due to coupling transmission losses, bearing friction, and the cooling effects of liquid viscosity. To optimize efficiency, it is crucial to reduce each stage's compression ratio, ensuring that the total power required for multi-stage compression remains lower than that of single-stage compression.
The two-stage screw air compressor features a dual rotary screw mechanism, with both active and passive screws. Driven by an external transmission, the active screw propels the passive screw. The first stage incorporates a low-pressure screw group, while the second stage contains a high-pressure screw group. Each screw is enveloped by a sealing air film, facilitating gas compression through suction, pressurization, and exhaust cycles as the screws rotate.
First Stage Compression: In this initial stage, the low-pressure screw group begins compressing the gas. Gas enters the screw compression chamber via the suction valve, and the high-speed rotation of the screw rotor further compresses the gas, transferring it to the second stage.
Second Stage Compression: During the second stage, gas enters a more confined screw space, undergoing compression at elevated temperatures and pressures. The exhaust valve subsequently opens, releasing the high-pressure gases from the system.
Natural air is drawn into the first stage through an air filter, where it mixes with a small amount of lubricating oil in the compression chamber. The gas is compressed to interstage pressure and cooled in the cooling channel by oil mist contact, significantly reducing its temperature. The cooled gas then enters the second-stage rotor for further compression to the final exhaust pressure. The entire process culminates as the compressor discharges the high-pressure gas through the exhaust valve.
| Sanzhi (Henan) Compressor Co,. Ltd. |
| Two-Stage Compression Permanent Magnet Variable Frequency 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. |
Experience the unparalleled power of our High Volume Two-Stage Centrifugal Screw Compressor! Utilizing a high-speed rotating impeller, our compressor accelerates and decelerates air with meticulous precision, ensuring axial entry for rapid and efficient cooling. This advanced cooling mechanism surpasses typical air-cooled fans, allowing for continuous operation and significantly extending the service life of the compressor.
1) High Efficiency of PM Motor:Our cutting-edge permanent magnet motor features an extensive constant torque and weak magnetic range, delivering 20-30% higher efficiency compared to conventional motors. It maintains this exceptional efficiency even when operating outside the rated frequency.
2) Maintenance-Free Motor:Designed without internal bearings, our permanent magnet motor eliminates the costs and labor associated with motor bearing maintenance and replacement.
3) Integrated Frequency Converter:Featuring China's leading frequency system, our compressor offers a wide speed regulation range with unparalleled precision, adapting seamlessly to your actual gas demand and ensuring superior energy-saving performance.
4) Zero Transmission Loss:Our permanent magnet motor and compressor are connected through an embedded integrated shaft structure, completely eliminating couplings and other transmission components for 100% transmission efficiency.
5) Variable Frequency Start and Soft Start:This advanced feature significantly reduces the impact on power grid equipment, safeguarding your electrical systems from potential damage.
6) Reduced Energy Consumption:Our frequency conversion ranges from 25% to 100%, unlike the typical range of 50% to 100%. This results in energy savings exceeding 30% compared to fixed-speed air compressors, and approximately 5% more than standard variable frequency compressors. The greater the fluctuation in system gas consumption, the more pronounced the energy-saving effect.
7) Unique Two-Stage Compression Air End:Our two-stage compression screw machine features a uniquely designed air end that integrates first-stage and second-stage compression rotors within a single casing. Driven directly by gears, each rotor achieves optimal linear speed, enhancing compression efficiency.
8) Innovative Internal Spray Curtain Cooling Method:Our high energy-saving internal spray curtain cooling method ensures superior temperature reduction of compressed air, achieving near-isothermal compression. This reduces pressure loss between stages, lowers the compression ratio, and boosts overall compression efficiency.
9) Minimized Internal Leakage:By lowering the compression ratio for each stage, our two-stage compression design minimizes internal leakage from high-pressure to low-pressure ends, thereby enhancing volume efficiency.
10) Noise Reduction:The two-stage compression system reduces the overall compression ratio, significantly lowering noise levels, particularly during unloading.
11) Easy Maintenance and Service:The two-stage compressor unit retains similar systems and structures to single-stage compressors, except for the screw air end. This design ensures that maintenance and user servicing remain straightforward and convenient.
1. Exceptional Price Advantage
We offer direct ex-factory prices, ensuring our customers stay highly competitive in their markets. Enjoy unparalleled cost savings while maintaining superior quality, providing you with the competitive edge needed to dominate your market.
2. Direct Transactions
Our products come straight from the factory, enabling us to provide more cost-effective solutions. By eliminating middlemen, we pass the savings directly to you, ensuring affordability while maintaining top-notch quality.
3. Comprehensive OEM & ODM Services
Backed by our robust production and management capabilities, we offer exceptional OEM and ODM services tailored to your specific needs. Partner with us to bring your vision to life with precision, excellence, and unmatched craftsmanship.
4. Personalized Customization
We welcome non-standard, export, and custom orders for voltage, power, pressure, and more. Reach out to discuss your specific requirements, and let us create a solution uniquely suited to your specifications.
5. Small Order Acceptance
Place a small trial order to experience the superior quality of our products firsthand. Discover why our clients trust SANZHI for consistent performance, reliability, and excellence.
6. Rapid Delivery
Benefit from our high-quality products paired with timely and efficient delivery services. We ensure you receive your orders promptly, keeping your operations running smoothly and efficiently.
7. Full Authorization
For our distributors, we provide comprehensive authorization certificates, empowering you to market our SANZHI brand products with confidence. Leverage the strength of our brand to boost your sales and credibility.
Sanzhi (Henan) Compressor Co., Ltd, a leading force in the manufacturing industry, specializes in producing top-tier screw air compressors and vacuum pumps. With over a decade of relentless dedication, we offer a comprehensive range of products including standard and low-pressure screw air compressors, cutting-edge permanent magnet frequency conversion models, two-stage compression units, specialized compressors for laser cutting, and versatile mobile screw compressors available in both single and double-tank configurations, powered by either electricity or diesel, as well as innovative screw vacuum pumps.
Our production processes exemplify efficiency and modernity, featuring cutting-edge multi-air compressor assembly lines. Supported by a skilled team of over 50 employees, we continuously enhance our ERP-based management systems, significantly shortening lead times and ensuring the prompt delivery of high-quality products.
Upholding rigorous standards, our factory is ISO9001 certified, highlighting our commitment to exceptional quality management. We meticulously implement stringent quality control measures, ensuring each machine undergoes thorough material inspections, production evaluations, and comprehensive pre-delivery checks before leaving our facility.
Our unparalleled customer service ethos begins with a pre-sales team providing expert advice to help you select the ideal air equipment, complemented by extensive customization options for appearance and configuration. We also excel in creating bespoke OEM products tailored to specific dealer requirements. Our seasoned after-sales team ensures rapid and effective responses to all customer inquiries and needs.
At Sanzhi (Henan) Compressor Co., Ltd, we are dedicated to delivering high-performance, reliable products that foster long-lasting customer relationships. Our efficient delivery schedules, top-tier machines, and competitive pricing guarantee you receive outstanding compressed air solutions every time.
Conveniently located in Xinzheng City, Henan Province, China, our factory is easily accessible. We offer complimentary transportation from Xinzheng International Airport to our premises, a brief 30-kilometer journey taking approximately one hour. We warmly welcome your visit!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a dedicated manufacturer specializing in screw air compressors with over a decade of professional experience.
Q2. How do you control quality?
A: 1. Strict raw material inspection.
2. Rigorous control of installation procedures.
3. Each machine undergoes a minimum of 5 hours of continuous testing before dispatch.
Q3. What information must I provide to get the suitable machine?
1. The required air delivery capacity (Unit: CFM or m³/Min).
2. The necessary working pressure (Unit: PSI, Bar, or Mpa).
3. The voltage and frequency of your location (V/Hz).
4. Any additional accessories needed, such as an air tank, filters, or air dryers.
Provide us with these details, and we will tailor a 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 compressors in voltages of 380V/50Hz/3P, 400V/50Hz/3P, 415V/50Hz/3P, 220V/60Hz/3P, 440V/60Hz/3P, and can customize according to your requirements.
Q6. How long is the delivery time?
A: For standard voltage specifications, our lead time is typically 15 working days following order confirmation. If custom non-standard voltage specifications are necessary, please reach out to our sales team for precise delivery timelines.
Q7. What's the payment term?
A: Our payment terms are carefully structured to ensure smooth transactions: an initial 30% T/T deposit in advance, followed by 40% T/T before shipment, and the remaining 30% T/T upon receipt of the B/L copy. We accept payments in both USD and RMB.
Q8. How about your warranty?
A: We offer an extensive warranty program: one year for the entire machine and an impressive two years for the screw air compressor, with the exclusion of consumable spare parts.
Q9. What about the maintenance?
A: The initial maintenance should be performed after 500 operating hours. Subsequent maintenance intervals are recommended between 2000-3000 hours, depending on specific working conditions.
Q10. Can machines be run in high-temperature environments?
A: Absolutely, our machines are meticulously engineered to perform efficiently in high-temperature environments, operating flawlessly within a temperature range from -20° to 45° (-4ºF to 113ºF).
Q11. Do you offer OEM service?
A: Yes, we provide both OEM and ODM services. Our expert design team ensures maximum flexibility to meet your specific requirements.
Q12. How long could your air compressor be used?
A: Our air compressors are masterfully built for durability, boasting a typical lifespan that exceeds 10 years.
Q13. Will you provide some spare parts for the machines?
A: Yes, we guarantee the availability of essential spare parts for all our machines.
Q14. How about your after-sales service?
A: We offer robust after-sales support, including online guidance for installation and commissioning. Additionally, we can dispatch skilled engineers for on-site training and installation assistance.
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