Unleash unparalleled performance with the Large Power Oil Lubricated Screw-Compressor from the esteemed 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. These compressors are meticulously integrated with top-tier Industrial Centrifugal Fans, ensuring optimal functionality. Expect nothing short of excellence with our Energy-Saving and High-Efficiency solutions, specifically crafted in a robust Stationary Type design to seamlessly cater to all your industrial requirements. Experience the pinnacle of innovation and reliability with Sanzhi's state-of-the-art compressor technology, designed to elevate your operational efficiency.
Detailed Overview: Internal Structure Frontside
Detailed Overview: Internal Structure Backside
Innovative Working Principle
In the realm of ideal air compression, the energy required for single-stage pressure transmission equals the combined power needed for multi-stage compression. However, real-world conditions introduce variables like coupling transmission power loss, bearing friction, and the cooling impact of liquid viscosity, which elevate the actual working power. To mitigate these inefficiencies, reducing the compression ratio at each stage can greatly diminish the total power needed for multi-stage compression. This refined approach ensures it is more efficient than single-stage compression.
The advanced two-stage screw air compressor boasts a state-of-the-art two-stage rotary screw mechanism. Each stage features an active and a passive screw. The active screw propels the passive screw via an external transmission device. The initial stage employs a low-pressure rate screw group, while the subsequent stage utilizes a high-pressure rate screw group. Every screw is enveloped by a sealing air film. During rotation, gas undergoes three phases of compression: suction, pressurization, and exhaust, ensuring optimal performance.
First Stage Compression: The initial phase in the two-stage screw air compressor employs a low-pressure rate screw group. Gas is drawn into the compression chamber through the suction valve. Here, it undergoes incremental compression by the high-speed rotation of the screw rotor before advancing to the second stage.
Second Stage Compression: In this phase, gas enters a more confined screw space, experiencing elevated temperatures and pressures. The exhaust valve then opens, efficiently releasing the high-pressure gases from the system, completing the compression cycle.
In the initial phase, natural air is drawn through the air filter and mixed with a small quantity of lubricating oil within the compression chamber. This mixture is then compressed to interstage pressure. The compressed gas flows through a cooling channel, encountering substantial oil mist, which significantly reduces its temperature. Subsequently, the cooled, compressed gas enters the second-stage rotor for additional compression, reaching the final exhaust pressure. The process culminates 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. |
Our state-of-the-art centrifugal fan incorporates an advanced high-speed rotating impeller, expertly designed to optimize airflow acceleration and deceleration. Featuring axial air intake, it dramatically enhances motor cooling compared to traditional air-cooled fans. This innovative design guarantees continuous compressor operation, significantly extending its lifespan with unparalleled reliability.
1) High Efficiency of *** Motor:Our premium permanent magnet (***) motor excels with an extensive constant torque range and a superior weak magnetic range. Offering 20-30% higher efficiency than conventional motors, it maintains exceptional performance even outside its rated frequency, ensuring consistent, top-tier results.
2) Maintenance-Free Motor:Engineered without internal bearings, the *** motor eliminates the need for costly bearing maintenance and replacement, ensuring uninterrupted and seamless performance.
3) Integrated Frequency Converter:Equipped with China's premier frequency system, this unit provides precise and extensive speed regulation. It dynamically adjusts operation based on real-time gas demands, delivering superior energy-saving performance and operational efficiency.
4) Zero Transmission Loss:Featuring a direct integrated shaft connection between the *** motor and compressor, this design eliminates the need for couplings and other transmission parts, ensuring 100% transmission efficiency for a more compact and efficient compressor.
5) Variable Frequency and Soft Start:This advanced feature minimizes the impact on power grid equipment, effectively safeguarding electrical systems from potential damage and enhancing overall reliability.
6) Reduced Energy Consumption:Boasting a frequency conversion range of 25% to 100% (compared to the standard 50% to 100%), this compressor delivers over 30% energy savings versus fixed-speed models and approximately 5% more than typical variable frequency compressors. The greater the fluctuations in system gas consumption, the more significant the energy savings.
7) Unique Two-Stage Compression Air End:Our pioneering two-stage compression design integrates first and second stage compression rotors within a single case, driven by gears at optimal speeds, significantly boosting compression efficiency and performance.
8) Internal Spray Curtain Cooling Method:Our innovative high-efficiency internal spray curtain cooling system drastically reduces compressed air temperatures. Achieving near-isothermal compression, it minimizes pressure loss and compression ratios, thereby enhancing overall efficiency and performance.
9) Minimized Internal Leakage:The advanced two-stage compression technique reduces each stage's compression ratio, decreasing internal leakage from high to low pressure ends. This enhancement boosts volumetric efficiency and overall performance.
10) Noise Reduction:Our dual-stage compression design significantly lowers the compression ratio, resulting in a notable reduction in both operational and unloading noise levels, creating a quieter work environment.
11) Easy Maintenance and Service:With a design that shares similar structures and systems with single-stage units, aside from the screw air end, our two-stage compressor unit ensures maintenance and service are straightforward and user-friendly.
1. Unbeatable Price Advantage
We offer direct ex-factory prices that ensure our clients stay ahead in their markets, maximizing both profitability and market share.
2. Seamless Direct Deal
Our products come straight from our factory to you, providing cost-effective solutions without the added costs of intermediaries.
3. Premium OEM & ODM Services
With advanced production and management capabilities, we deliver superior OEM and ODM services tailored to your exact specifications and business needs.
4. Tailored Customization Services
Specializing in non-standard and export orders, we customize voltage, power, pressure, and more to meet your specific requirements. Contact us for personalized solutions.
5. Small Order Flexibility
Start with a small trial order to experience the exceptional quality of our products and witness the difference for yourself.
6. Rapid and Reliable Delivery
We ensure that our high-quality products are delivered swiftly and efficiently, keeping your operations running smoothly without interruption.
7. Comprehensive Authorization
For our distributors, we provide full authorization certificates, empowering you to confidently sell SANZHI brand products with our complete 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 state-of-the-art 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 requirements, our lead time is 15 working days post-confirmation. For non-standard voltage requests, we recommend contacting our sales team to obtain precise timelines tailored to your needs.
Q7. What's the payment term?
A: We require a structured payment plan of 30% T/T in advance, 40% T/T prior to shipment, and the remaining 30% T/T upon receipt of the B/L copy. Payments can be made in both USD and RMB currencies.
Q8. How about your warranty?
A: Our warranty offers comprehensive coverage for one year on the entire machine and two years on the screw air compressor, excluding consumable spare parts.
Q9. What about the maintenance?
A: The initial maintenance should be conducted after 500 operating hours. Subsequent maintenance is recommended every 2000-3000 hours, depending on the actual working environment.
Q10. Can machines be run in high-temperature environment?
A: Absolutely. Our machines are engineered to operate efficiently in high-temperature environments, with a working temperature range from -20° to 45°C (-4°F to 113°F).
Q11. Do you offer OEM service?
A: Indeed, we provide both OEM and ODM services, supported by our professional design team, ensuring high adaptability to your specific requirements.
Q12. How long could your air compressor be used?
A: Our air compressors boast a robust lifespan, typically lasting over 10 years with proper maintenance.
Q13. Will you provide some spare parts for the machines?
A: Yes, we will definitely provide essential spare parts for the machines to ensure their longevity and performance.
Q14. How about your after-sales service?
A: We offer an all-inclusive after-sales service package that includes online guidance for installation and commissioning. Additionally, we can arrange for our engineers to provide on-site training and installation support.
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