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. Embrace the advantage of advanced technology with Sanzhi's 185kw High Volume Two-Stage Screw Air Compressor for Industrial Use, ensuring remarkable durability and consistency in your operations. Experience unmatched efficiency, reliability, and cost-effectiveness with Sanzhi's revolutionary compressor technology, engineered to elevate your industrial processes to new heights of performance and sustainability.
Internal Structure Frontside
Internal Structure Backside
Working Principle
In an ideal air compression scenario, the power required for single-stage pressure transmission equals the cumulative power for multi-stage compression. However, during real-world operations, the power demand increases due to factors like coupling transmission losses, bearing friction, and the cooling effects of liquid viscosity. To boost efficiency, it is crucial to minimize the compression ratio at each stage, ensuring that the overall power required for multi-stage compression remains lower than that of single-stage compression.
The two-stage screw air compressor boasts a sophisticated dual rotary screw mechanism, incorporating both active and passive screws. Driven by an external transmission, the active screw propels the passive screw. The system initiates with a low-pressure screw group in the first stage, followed by a high-pressure screw group in the second stage. Each screw is encased by a sealing air film, which facilitates the gas compression through sequential suction, pressurization, and exhaust cycles during the screw's rotation.
First Stage Compression: In this initial phase, the low-pressure screw group starts the gas compression process. Gas is drawn into the screw compression chamber through the suction valve, where the rapid rotation of the screw rotor further compresses the gas, transferring it efficiently to the second stage.
Second Stage Compression: At this advanced stage, gas enters a more confined screw space and undergoes compression at significantly higher temperatures and pressures. The exhaust valve then opens, releasing the high-pressure gas from the system.
Natural air is first drawn into the initial stage through an air filter, where it mixes with a small amount of lubricating oil in the compression chamber. The gas is then compressed to interstage pressure and cooled in the cooling channel by contact with oil mist, which significantly lowers its temperature. The cooled gas proceeds to the second-stage rotor for further compression to the final exhaust pressure. The entire process concludes 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 and efficiency of our High Volume Centrifugal Fan Two-Stage Air Compressor! This advanced system, equipped with a high-speed rotating impeller, precisely accelerates and decelerates the air for axial entry and rapid cooling. Outperforming conventional air-cooled fans, it supports continuous operations and significantly extends service life.
1) High Efficiency of PM Motor:Our cutting-edge permanent magnet motor offers an expanded constant torque range and weak magnetic range, achieving 20-30% higher efficiency than standard motors. It maintains outstanding performance, even when deviating from the rated frequency.
2) Maintenance-Free Motor:Our permanent magnet motor is ingeniously designed without internal bearings, eliminating the costly maintenance and replacement associated with motor bearings.
3) Integrated Frequency Converter:Outfitted with China's premier frequency system, our compressor features a wide and precise speed regulation range. It seamlessly adapts to actual gas demand, offering incredible energy-saving capabilities.
4) Zero Transmission Loss:The embedded integrated shaft structure directly connects the permanent magnet motor to the compressor, eliminating the need for couplings and other transmission parts, ensuring flawless 100% transmission efficiency.
5) Variable Frequency Start and Soft Start:This feature significantly reduces the impact on power grid equipment, effectively safeguarding electrical systems from potential damage.
6) Reduced Energy Consumption:Our frequency conversion ranges from 25% to 100%, surpassing the standard 50% to 100% range. This delivers over 30% energy savings compared to fixed-speed air compressors and about 5% more than standard variable frequency compressors. Larger fluctuations in system gas consumption further amplify these energy-saving effects.
7) Unique Two-Stage Compression Air End:Our uniquely designed air end integrates first-stage and second-stage compression rotors within a single case, each driven directly by gears. This design ensures optimal linear speed and enhances compression efficiency.
8) Innovative Internal Spray Curtain Cooling Method:Our high energy-saving internal spray curtain cooling method delivers exceptional cooling, significantly reducing the temperature of compressed air. It achieves near-isothermal compression, reduces interstage pressure loss, lowers compression ratios, and enhances overall compression efficiency.
9) Minimized Internal Leakage:By reducing the compression ratio for each stage, our two-stage compression method minimizes internal leakage from high-pressure to low-pressure ends, thereby greatly enhancing volume efficiency.
10) Noise Reduction:The two-stage compression system effectively lowers the compression ratio, resulting in significantly reduced noise levels, particularly during unloading.
11) Easy Maintenance and Service:With a two-stage compressor unit, the similarities in systems and structures to single-stage compression make maintenance and user servicing straightforward and convenient, aside from the screw air end.
1. Unmatched Price Competitiveness
We offer direct ex-factory prices, ensuring our customers maintain a significant edge in their markets. Experience substantial cost savings combined with outstanding quality, empowering you to lead and conquer your market with confidence.
2. Seamless Direct Transactions
Our products are delivered straight from the factory, enabling us to offer more budget-friendly solutions. By cutting out intermediaries, we pass the savings directly to you, guaranteeing affordability without compromising on quality.
3. Exceptional OEM & ODM Services
Harnessing our advanced production and management capabilities, we deliver superior OEM and ODM services tailored precisely to your needs. Collaborate with us to realize your vision with unmatched precision and excellence.
4. Tailored Customization
We are open to non-standard, export, and custom orders for voltage, power, pressure, and more. Reach out to discuss your specific needs, and let us craft a solution that perfectly aligns with your unique specifications.
5. Acceptance of Small Orders
Initiate a small trial order to experience the outstanding quality of our products firsthand. See why our clients consistently rely on SANZHI for superior performance and reliability.
6. Swift and Reliable Delivery
Take advantage of our premium products coupled with prompt and efficient delivery services. We ensure that your orders arrive on time, keeping your operations seamlessly functional.
7. Comprehensive Authorization
For our valued distributors, we offer complete authorization certificates, empowering you to market SANZHI brand products with utmost confidence. Utilize our brand's strength to enhance your sales and credibility.
Sanzhi (Henan) Compressor Co., Ltd. stands as a beacon of excellence in the manufacturing industry, renowned for producing high-quality screw air compressors and vacuum pumps. With over a decade of relentless dedication, our diverse portfolio includes standard and low-pressure screw air compressors, cutting-edge permanent magnet frequency conversion models, two-stage compression units, laser cutting-specific compressors, and versatile mobile screw compressors. Available in single and double-tank variants, our offerings come in both electric and diesel versions, complemented by our innovative screw vacuum pumps.
Our production processes epitomize efficiency and modernity, showcasing state-of-the-art multi-air compressor assembly lines. Supported by a skilled team of over 50 employees, we continually enhance our ERP-driven management systems, significantly reducing lead times and ensuring the timely delivery of premium quality products.
Adhering to the highest standards, our factory proudly holds ISO9001 certification, a testament to our unwavering commitment to quality management. We rigorously enforce comprehensive quality control measures, ensuring each machine undergoes meticulous material inspections, production assessments, and thorough pre-delivery checks before it leaves our facility.
Our customer service ethos is unmatched. Our pre-sales team provides expert guidance to help you select the ideal air equipment, with extensive customization options available for appearance and configuration. We specialize in creating bespoke OEM products tailored to specific dealer requirements. Our after-sales team, composed of experienced professionals, guarantees swift 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 enduring customer relationships. Our efficient delivery schedules, superior machines, and competitive pricing ensure you receive exceptional compressed air solutions every time.
Strategically located in Xinzheng City, Henan Province, China, our factory offers easy accessibility. We provide complimentary transportation from Xinzheng International Airport to our premises, a brief 30-kilometer journey that takes approximately one hour. We warmly welcome you to visit us!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a specialized manufacturer focusing on screw air compressors, with over a decade of professional experience.
Q2. How do you control quality?
A: 1. Strict inspection of raw materials.
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 for air compressors?
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, we ensure swift delivery with a lead time of just 15 working days post order confirmation. Should you require custom, non-standard voltage specifications, please connect with our sales team for precise, tailored delivery timelines that meet your unique requirements.
Q7. What's the payment term?
A: To facilitate a seamless transaction experience, our payment terms are structured as follows: a 30% T/T deposit is required at the outset, followed by 40% T/T prior to shipment, and the remaining 30% T/T upon receipt of the B/L copy. We accept payments in both USD and RMB to accommodate your preferences.
Q8. How about your warranty?
A: Our comprehensive warranty program offers a one-year warranty for the entire machine, alongside an extended two-year warranty specifically for the screw air compressor, ensuring coverage for non-consumable components.
Q9. What about the maintenance?
A: We recommend an initial maintenance check-up after the first 500 operating hours. Following this, regular maintenance should be carried out every 2000-3000 hours, based on specific working conditions to sustain optimal performance.
Q10. Can machines be run in high-temperature environment?
A: Certainly, our machines are meticulously engineered to maintain peak performance in high-temperature environments, functioning efficiently within a temperature range of -20° to 45° (-4ºF to 113ºF).
Q11. Do you offer OEM service?
A: Yes, we proudly offer comprehensive OEM and ODM services. Our dedicated design team is committed to providing innovative and flexible solutions to precisely meet your unique specifications.
Q12. How long could your air compressor be used?
A: Engineered for exceptional durability, our air compressors boast a remarkable lifespan exceeding 10 years, ensuring long-term reliability and peace of mind.
Q13. Will you provide some spare parts for the machines?
A: Absolutely, we ensure the availability of spare parts for all our machinery, guaranteeing you have the essential components for efficient maintenance and timely repairs.
Q14. How about your after-sales service?
A: Our extensive after-sales service includes comprehensive online guidance for installation and commissioning. For added convenience, we can also dispatch engineers for on-site training and installation support, ensuring seamless and efficient operation from day one.
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