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 the ideal air compression process, the power required for single-stage pressure transmission is similar to the combined power needed for multi-stage compression. However, in real-world applications, actual working power increases due to coupling transmission power loss, bearing friction, and the cooling effect of liquid viscosity. To mitigate these inefficiencies, reducing the compression ratio at each stage can significantly lower the total power required for multi-stage compression. This optimization makes multi-stage compression more efficient than single-stage compression.
The two-stage screw air compressor is meticulously engineered with an advanced two-stage rotary screw mechanism. Each stage consists of an active and a passive screw, with the active screw driving the passive screw via an external transmission device. The first stage employs a low-pressure screw set, while the second stage utilizes a high-pressure screw set. A sealing air film envelops each screw. As the screws rotate, gas is efficiently compressed through three distinct phases: suction, pressurization, and exhaust.
First Stage Compression: In the initial phase, the two-stage screw air compressor employs a low-pressure screw set. Gas is drawn into the screw compression chamber via the suction valve, where it undergoes incremental compression by the high-speed rotation of the screw rotor. This partially compressed gas is then transferred to the second stage for further processing.
Second Stage Compression: During the second phase, the gas enters a more confined screw space, where it is subjected to higher temperatures and pressures. The exhaust valve then opens, releasing the high-pressure gas from the system, completing the compression cycle with precision.
The process begins as natural air is 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 then flows through the cooling channel, encountering a significant oil mist that drastically reduces its temperature. The cooled, compressed gas enters the second-stage rotor for further compression to the final exhaust pressure, culminating with the gas being efficiently 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 features an advanced high-speed rotating impeller, crafted with precision to enhance airflow acceleration and deceleration. With axial air intake, this innovation significantly boosts motor cooling compared to traditional air-cooled fans. This revolutionary design ensures uninterrupted compressor operation and greatly extends its lifespan.
1) High Efficiency of *** Motor:The permanent magnet (***) motor stands out for its extensive constant torque range and weak magnetic range, delivering 20-30% higher efficiency than conventional motors. Remarkably, the *** motor maintains superior efficiency even beyond its rated frequency, ensuring consistent top-tier performance.
2) Maintenance-Free Motor:Designed without internal bearings, the *** motor eliminates the need for costly bearing maintenance and replacement, ensuring seamless performance.
3) Integrated Frequency Converter:Utilizing China's premier frequency system, this unit offers precise and broad speed regulation. It dynamically adjusts operations based on real-time gas demands, providing exceptional energy-saving performance.
4) Zero Transmission Loss:The *** motor and compressor are directly integrated via shaft connection, creating a compact design. Eliminating couplings and other transmission components, it ensures 100% transmission efficiency.
5) Variable Frequency and Soft Start:This feature reduces the impact on power grid equipment, safeguarding electrical systems from potential damage.
6) Reduced Energy Consumption:With a frequency conversion range of 25% to 100% (versus the standard 50% to 100%), this compressor achieves over 30% energy savings compared to fixed-speed models and about 5% more than typical variable frequency compressors. Greater system gas consumption fluctuations lead to more substantial energy savings.
7) Unique Two-Stage Compression Air End:This innovative design integrates 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 system dramatically reduces compressed air temperatures. Achieving near-isothermal compression, it minimizes pressure loss and compression ratios, thereby enhancing overall efficiency.
9) Minimized Internal Leakage:The two-stage compression method reduces each stage's compression ratio, cutting down internal leakage from high to low pressure ends and thereby improving volumetric efficiency.
10) Noise Reduction:The two-stage compression design significantly lowers the compression ratio, leading to a considerable reduction 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 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, ensuring cost-effective solutions by eliminating intermediary markups. Experience the unparalleled benefits of a seamless direct deal.
3. Premium OEM & ODM Services
With cutting-edge production and management capabilities, we provide superior OEM and ODM services. These services are crafted to meet your exact specifications and business needs, ensuring the best fit for your market.
4. Tailored Customization Services
We specialize in non-standard and export orders, offering customized solutions in voltage, power, pressure, and more. Discuss your specific requirements with us to obtain personalized solutions that perfectly match your needs.
5. Small Order Flexibility
Begin 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 dependable 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 a decade of professional expertise.
Q2. How do you control quality?
A: 1. Stringent 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 environments?
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 boast an impressive 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 pride ourselves on offering unparalleled after-sales service to ensure your complete satisfaction. Our comprehensive support includes expert online guidance for both installation and commissioning processes. Furthermore, we can coordinate with our highly skilled engineers to provide hands-on training and installation support to meet all your needs.
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