Unleash unparalleled performance with the Large Power Oil-Lubricated Screw Compressor from Sanzhi (Henan) Compressor Co., Ltd.! As a distinguished leader in the Chinese market, we proudly offer Factory Price Permanent Magnet Variable Frequency Two-Stage Screw Air Compressors, meticulously integrated with top-tier Industrial Centrifugal Fans. Expect nothing short of excellence with our energy-saving and high-efficiency solutions, crafted in a robust stationary type design to seamlessly meet all your industrial requirements. Our compressors promise remarkable reliability, superior functionality, and unmatched durability, ensuring your operations run smoothly and efficiently. Choose Sanzhi for innovation, quality, and unparalleled industrial air compression solutions.
Internal Structure Frontside
Internal Structure Backside
Working Principle
In an ideal air compression process, the power required for single-stage pressure transmission is comparable to the combined power needed for multi-stage compression. However, in practical applications, actual working power increases due to coupling transmission power loss, bearing friction, and the cooling effect of liquid viscosity. To mitigate these effects, reducing the compression ratio at each stage can significantly decrease the total power needed for multi-stage compression, making it more efficient than single-stage compression.
The two-stage screw air compressor is engineered with a sophisticated two-stage rotary screw mechanism, featuring an active and a passive screw in each stage. The active screw drives the passive screw via an external transmission device. The first stage employs a low-pressure rate screw group, while the second stage utilizes a high-pressure rate screw group. Each screw is enveloped by a sealing air film. As the screws rotate, gas is systematically compressed through three phases: suction, pressurization, and exhaust.
First Stage Compression: During the initial phase, the two-stage screw air compressor uses a low-pressure rate screw group. Gas is drawn into the screw compression chamber via the suction valve, where it is incrementally compressed by the high-speed rotation of the screw rotor before being transferred to the second stage.
Second Stage Compression: In the second phase, the gas enters a more confined screw space and is subjected to higher temperatures and pressures. The exhaust valve then opens, releasing the high-pressure gases from the system.
Natural air is initially drawn into the compressor through an air filter and mixed with a small quantity of lubricating oil in the compression chamber. This mixture is compressed to interstage pressure. The compressed gas flows through the cooling channel, encountering significant oil mist, which drastically reduces its temperature. The cooled, compressed gas then enters the second-stage rotor for further compression to the final exhaust pressure. The process culminates with the gas being discharged 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. |
The centrifugal fan showcases a state-of-the-art high-speed rotating impeller, meticulously designed to optimize airflow acceleration and deceleration. Coupled with axial air intake, this innovation significantly enhances motor cooling when compared to traditional air-cooled fans. This ground-breaking design ensures uninterrupted compressor operation and substantially prolongs its lifespan.
1) High Efficiency of *** Motor:The permanent magnet (***) motor is renowned for its expansive constant torque range and weak magnetic range, offering 20-30% higher efficiency than traditional motors. Impressively, the *** motor maintains its outstanding efficiency even when operating beyond its rated frequency, guaranteeing unwavering top-tier performance.
2) Maintenance-Free Motor:Engineered without internal bearings, the *** motor eradicates the necessity for costly bearing maintenance and replacement, ensuring flawless performance.
3) Integrated Frequency Converter:Leveraging China's foremost frequency system, this unit delivers precise and extensive speed regulation. It dynamically adjusts its operation based on real-time gas demands, resulting in exceptional energy-saving performance.
4) Zero Transmission Loss:The *** motor and compressor feature a direct integrated shaft connection, creating a more compact design. By eliminating couplings and other transmission components, it guarantees 100% transmission efficiency.
5) Variable Frequency and Soft Start:This functionality mitigates the impact on power grid equipment, protecting electrical systems from potential damage.
6) Reduced Energy Consumption:With a frequency conversion range of 25% to 100% (compared to the standard 50% to 100%), this compressor achieves over 30% energy savings compared to fixed-speed models and approximately 5% more than typical variable frequency compressors. Greater fluctuations in system gas consumption translate to more substantial energy savings.
7) Unique Two-Stage Compression Air End:This innovative design combines first and second stage compression rotors within a single case, driven by gears for optimal speed, significantly enhancing compression efficiency.
8) Internal Spray Curtain Cooling Method:Our highly efficient internal spray curtain cooling dramatically reduces compressed air temperatures. Achieving near-isothermal compression, it minimizes pressure loss and compression ratios, thereby boosting overall efficiency.
9) Minimized Internal Leakage:The two-stage compression technique lowers each stage's compression ratio, reducing internal leakage from high to low pressure ends and thus improving volumetric efficiency.
10) Noise Reduction:The dual-stage compression design substantially reduces the compression ratio, resulting in a significant decrease in both operational and unloading noise levels.
11) Easy Maintenance and Service:Apart from the screw air end, the two-stage compressor unit shares similar structures and systems with single-stage units, making maintenance and service both straightforward and user-friendly.
1. Unbeatable Price Advantage
We offer direct ex-factory prices, ensuring that our clients remain highly competitive in their markets. Benefit from maximum profitability and enhanced market share with our cost-efficient pricing model.
2. Seamless Direct Deal
Our products come straight from the factory to you, providing more cost-effective solutions by eliminating intermediary markups. Experience the benefits of a seamless direct deal.
3. Premium OEM & ODM Services
With advanced production and management capabilities, we offer superior OEM and ODM services. These are crafted to meet your exact specifications and business needs, ensuring the best fit for your market.
4. Tailored Customization Services
We excel in non-standard and export orders, customizing voltage, power, pressure, and more. Discuss your specific requirements with us to obtain personalized solutions that perfectly match your needs.
5. Small Order Flexibility
Initiate with a small trial order to evaluate the exceptional quality of our products. Witness the remarkable difference firsthand and build confidence in our offerings.
6. Rapid and Reliable Delivery
We guarantee swift and efficient delivery of our high-quality products, ensuring that your operations proceed without delay. Trust in our reliable logistics.
7. Comprehensive Authorization
For our distributors, we provide complete authorization certificates. This empowers you to sell SANZHI brand products with full confidence and comprehensive support from us.
Sanzhi (Henan) Compressor Co., Ltd. stands as a distinguished leader in the manufacturing of screw air compressors and screw vacuum pumps. With over a decade of rich industry expertise, we proudly offer a comprehensive product portfolio, including normal pressure/low-pressure screw air compressors, permanent magnet frequency conversion screw air compressors, two-stage compression screw air compressors, specialized screw air compressors for laser cutting, single-tank and double-tank mobile screw air compressors, electric and diesel mobile screw air compressors, and high-performance screw vacuum pumps.
Our production operations are a testament to efficiency and modernity, leveraging lean, multi-air compressor assembly lines. Supported by a dedicated workforce of over 50 professionals, we continuously refine our management systems, such as ERP, to minimize lead times and guarantee the rapid delivery of top-tier products.
Our commitment to excellence is validated by our ISO9001 quality management system certification. Adhering to stringent quality management protocols and standardized control processes, we ensure that each machine undergoes thorough material, production, and pre-delivery inspections, guaranteeing impeccable quality.
We pride ourselves on delivering exceptional customer service. During pre-sales, we offer expert guidance to help clients choose the ideal air equipment and provide highly customized solutions, including unique OEM products tailored to specific dealer requirements. Post-sales, our professional sales and service team ensures prompt responses to customer inquiries, maintaining customer satisfaction.
At Sanzhi (Henan) Compressor Co., Ltd., our commitment is to deliver superior and reliable products, fostering long-term relationships with our clientele. With efficient delivery, premium quality machines, and competitive pricing, we aim to provide unparalleled compressed air solutions.
Our factory is conveniently located in Xinzheng City, Henan Province, China. We offer hassle-free pick-up services from Xinzheng International Airport to our factory, situated approximately 30 kilometers away-a journey of about one hour. We warmly welcome you to visit our company and witness our operations firsthand!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a dedicated manufacturer of screw air compressors with over 10 years 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 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, our lead time is 15 working days post-confirmation. For non-standard voltage requirements, kindly reach out to our sales team for precise timelines.
Q7. What's the payment term?
A: We require a payment structure of 30% T/T in advance, 40% T/T before shipment, and the remaining 30% T/T upon receipt of the B/L copy. We accept both USD and RMB as payment currencies.
Q8. How about your warranty?
A: Our warranty covers one year for the entire machine and two years for the screw air compressor, excluding consumable spare parts.
Q9. What about the maintenance?
A: The first maintenance should be conducted after 500 operating hours. Subsequent maintenance is required every 2000-3000 hours, depending on the actual working environment.
Q10. Can machines be run in high-temperature environment?
A: Absolutely, our machines are designed to operate efficiently in high-temperature environments, with a working temperature range from -20° to 45° (-4ºF to 113ºF).
Q11. Do you offer OEM service?
A: Yes, we offer both OEM and ODM services, backed by our professional design team, making us highly adaptable to your unique needs.
Q12. How long could your air compressor be used?
A: Our air compressors have a robust lifespan, typically exceeding 10 years.
Q13. Will you provide some spare parts for the machines?
A: Yes, we will definitely provide spare parts for the machines.
Q14. How about your after-sales service?
A: We offer comprehensive after-sales service including online guidance for installation and commissioning. Additionally, we can arrange for our engineers to provide training and installation support.
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