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. Elevate your operations with the assurance of superior quality and unmatched reliability, engineered to perfection for optimal productivity and long-term sustainability.
Internal Structure Frontside
Internal Structure Backside
Working Principle
In an ideal air compression process, the power required for single-stage pressure transmission equates to the combined power necessary for multi-stage compression. However, real-world applications often see increased actual working power due to factors like coupling transmission power loss, bearing friction, and the cooling effect of liquid viscosity. By reducing the compression ratio at each stage, one can significantly lower the total power required for multi-stage compression, making it more efficient than single-stage compression.
The two-stage screw air compressor boasts a sophisticated two-stage rotary screw mechanism, with each stage featuring an active and a passive screw. 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 undergoes three phases: suction, pressurization, and exhaust.
First Stage Compression: The initial phase of the two-stage screw air compressor uses a low-pressure rate screw group. Gas is drawn into the screw compression chamber through 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 the air filter and mixed with a minimal amount of lubricating oil within the compression chamber. This mixture is compressed to interstage pressure. The compressed gas then flows through the cooling channel, encountering substantial oil mist, which significantly reduces its temperature. The cooled, compressed gas then enters the second-stage rotor for additional compression to the final exhaust pressure. The entire 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, featuring an advanced high-speed rotating impeller, is engineered to optimize airflow acceleration and deceleration. With axial air intake, it significantly enhances motor cooling compared to traditional air-cooled fans. This cutting-edge design guarantees uninterrupted compressor operation, thereby substantially extending its lifespan.
1) High Efficiency of *** Motor:The permanent magnet (***) motor stands out with an expansive constant torque range and weak magnetic range, delivering 20-30% higher efficiency than conventional motors. Remarkably, the *** motor retains its exceptional efficiency even when operating outside its rated frequency, ensuring consistent top-tier performance across various conditions.
2) Maintenance-Free Motor:Engineered without internal bearings, the *** motor eliminates the need for costly bearing maintenance and replacement, ensuring seamless, hassle-free performance.
3) Integrated Frequency Converter:Utilizing China's premier frequency system, this unit provides precise, extensive speed regulation. It dynamically adjusts operation based on real-time gas demands, delivering outstanding energy-saving performance and operational efficiency.
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 parts, it ensures 100% transmission efficiency, maximizing performance.
5) Variable Frequency and Soft Start:This feature minimizes the impact on power grid equipment, safeguarding sensitive electrical systems from potential harm and ensuring smooth operation.
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 versus fixed-speed models and approximately 5% more than typical variable frequency compressors. Greater system gas consumption fluctuations lead to even more significant energy savings.
7) Unique Two-Stage Compression Air End:This pioneering design integrates first and second stage compression rotors within a single case, driven by gears for optimal speed, significantly enhancing compression efficiency and performance.
8) Internal Spray Curtain Cooling Method:Our high-efficiency internal spray curtain cooling method drastically reduces compressed air temperatures. By achieving near-isothermal compression, it minimizes pressure loss and compression ratios, thereby enhancing overall system efficiency.
9) Minimized Internal Leakage:The two-stage compression technique reduces each stage's compression ratio, decreasing internal leakage from high to low-pressure ends, thus enhancing volumetric efficiency and overall performance.
10) Noise Reduction:The dual-stage compression design significantly lowers the compression ratio, resulting in a notable reduction in both operational and unloading noise levels, contributing to a quieter working environment.
11) Easy Maintenance and Service:Aside from the screw air end, the two-stage compressor unit shares similar structures and systems with single-stage units, making maintenance and service straightforward, user-friendly, and economical.
1. Unbeatable Price Advantage
We offer direct ex-factory prices that give our clients a significant edge in their markets, enhancing both profitability and market share through competitive pricing.
2. Seamless Direct Deal
Our products come straight from the factory to you, providing cost-effective solutions without any intermediary markups, ensuring more value for your investment.
3. Premium OEM & ODM Services
With advanced production and management capabilities, we provide exceptional OEM and ODM services, meticulously crafted to meet your precise specifications and business objectives.
4. Tailored Customization Services
Specializing in non-standard and export orders, we customize voltage, power, pressure, and more to perfectly align with your needs. Contact us to explore bespoke solutions.
5. Small Order Flexibility
Begin with a small trial order to experience the superior quality of our products firsthand and witness the SANZHI difference.
6. Rapid and Reliable Delivery
We ensure our high-quality products are delivered quickly and reliably, keeping your operations running smoothly without delays.
7. Comprehensive Authorization
For our distributors, we provide full authorization certificates, enabling you to promote and sell SANZHI brand products with complete confidence and support.
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 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 offers a range of voltages including 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, 440v/60hz/3p, with customization options to meet your specific requirements.
Q6. How long is the delivery time?
A: For standard voltage units, delivery is within 15 working days post order confirmation. For non-standard requirements, please contact our sales team.
Q7. What's the payment term?
A: Payment terms include 30% T/T in advance, 40% T/T before shipment, and the remaining 30% T/T upon B/L copy. Payments can be made in USD or RMB.
Q8. How about your warranty?
A: We offer a comprehensive warranty of 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 initial maintenance is required after 500 hours of operation. Subsequent maintenance should be performed every 2000-3000 hours, taking into account 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 excel in both OEM & ODM services, backed by our professional design team. Your custom orders are highly welcomed.
Q12. How long could your air compressor be used?
A: Our air compressors are engineered for longevity, typically exceeding 10 years of service life.
Q13. Will you provide some spare parts for the machines?
A: Certainly, we provide an array of spare parts to ensure the smooth operation of your machines.
Q14. How about your after-sales service?
A: We offer comprehensive after-sales support, including online installation and commissioning guidance, and can arrange engineers for training and installation assistance as needed.
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