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.
Internal Structure Frontside
Internal Structure Backside
Working Principle
In an ideal air compression process, the power required for single-stage pressure transmission is equivalent to the combined power needed for multi-stage compression. However, in real-world applications, the actual working power increases due to factors like coupling transmission power loss, bearing friction, and the cooling effect of liquid viscosity. To counteract 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 features a sophisticated two-stage rotary screw mechanism, with each stage comprising an active and a passive screw. The active screw drives the passive screw through an external transmission device. The first stage utilizes a low-pressure rate screw group, while the second stage employs a high-pressure rate screw group. Each screw is enveloped by a sealing air film. As the screws rotate, gas is compressed through 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 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 the air filter and is 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, where it encounters a significant amount of oil mist, drastically reducing its temperature. The cooled, compressed gas 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 features an advanced high-speed rotating impeller that optimizes airflow acceleration and deceleration. With axial air intake, it significantly enhances motor cooling compared to traditional air-cooled fans. This cutting-edge design guarantees continuous compressor operation and substantially extends its lifespan.
1) High Efficiency of *** Motor:The permanent magnet (***) motor shines with an expansive constant torque range and weak magnetic range. It delivers 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.
2) Maintenance-Free Motor:Designed without internal bearings, the *** motor eliminates the need for expensive bearing maintenance and replacement, ensuring seamless 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.
4) Zero Transmission Loss:The *** motor and compressor boast a direct integrated shaft connection for a more compact design. By removing couplings and other transmission parts, it ensures 100% transmission efficiency.
5) Variable Frequency and Soft Start:This feature minimizes the impact on power grid equipment, safeguarding electrical systems from potential harm.
6) Reduced Energy Consumption:Featuring 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 result in 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.
8) Internal Spray Curtain Cooling Method:Our high-efficiency internal spray curtain cooling drastically 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 technique reduces each stage's compression ratio, decreasing internal leakage from high to low pressure ends and thus enhancing volumetric efficiency.
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.
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 and user-friendly.
1. Unbeatable Price Advantage
We offer direct ex-factory prices that ensure our clients remain highly competitive in their respective markets, maximizing profitability and market share.
2. Seamless Direct Deal
Our products come directly from the factory to you, allowing us to provide more cost-effective solutions without intermediary markups.
3. Premium OEM & ODM Services
Our advanced production and management capabilities enable us to deliver superior OEM and ODM services, tailored to your exact specifications and business needs.
4. Tailored Customization Services
We specialize in non-standard and export orders, customizing voltage, power, pressure, and more to meet your specific requirements. Get in touch to discuss personalized solutions.
5. Small Order Flexibility
Start with a small trial order to experience the exceptional quality of our products and see the difference firsthand.
6. Rapid and Reliable Delivery
We guarantee that our high-quality products will be delivered to you swiftly and efficiently, ensuring your operations remain uninterrupted.
7. Comprehensive Authorization
For our distributors, we provide complete authorization certificates, empowering you to sell SANZHI brand products with full 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, boasting over a decade of industry expertise.
Q2. How do you control quality?
A: 1. Each raw material undergoes a stringent inspection process.
2. Installation procedures are controlled with meticulous precision.
3. Every machine must endure a rigorous minimum of 5 hours of continuous testing before shipment.
Q3. What information must I provide to get the suitable machine?
1. Specify the desired air delivery capacity (Unit: CFM or m³/Min).
2. Indicate the required working pressure (Unit: PSI, Bar, or Mpa).
3. Provide voltage and frequency specifications in your country (V/Hz).
4. List any additional accessories needed, such as air tanks, filters, and/or air dryers.
Share these details with us, and we will recommend the best tailored solutions for you!
Q4. What is the general unit conversion?
1 Bar = 0.1 Mpa = 14.5 PSI
1 m³/min = 35.32 cfm
1 KW = 1.34 HP
Q5. What are the available voltage options for air compressors?
A: Sanzhi offers diverse voltage options, including 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, and 440v/60hz/3p. Customization to your specific needs is also available.
Q6. How long is the delivery time?
A: For standard voltage options, expect a prompt delivery of 15 working days post-order confirmation. For non-standard requirements, contact our sales team for a customized timeline.
Q7. What's the payment term?
A: We offer a flexible payment structure: 30% T/T in advance, 40% T/T before shipment, and the remaining 30% T/T against the B/L copy. Payments in both USD and RMB are accepted.
Q8. How about your warranty?
A: Benefit from our comprehensive warranty: one year for the entire machine and two years for the screw air compressor, excluding consumable parts.
Q9. What about the maintenance?
A: Perform initial maintenance after 500 hours of operation, followed by routine maintenance every 2000-3000 hours, with adjustments as needed based on the working environment.
Q10. Can machines be run in high-temperature environment?
A: Certainly, our machines are engineered to perform efficiently in high-temperature environments, with an operational range from -20° to 45° (-4ºF to 113ºF).
Q11. Do you offer OEM service?
A: Yes, we offer comprehensive OEM & ODM services, supported by our expert design team, to meet your specific requirements.
Q12. How long could your air compressor be used?
A: Our durable air compressors are designed to provide reliable service for over 10 years.
Q13. Will you provide some spare parts for the machines?
A: Absolutely! We are committed to ensuring your machine operates at peak efficiency by supplying all essential spare parts.
Q14. How about your after-sales service?
A: We provide an all-encompassing after-sales service that includes detailed online instructions for both installation and commissioning. Our experienced engineers are readily available to assist with training and installation, ensuring a seamless experience.
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