Introducing the groundbreaking Low-Pressure Twin-Stage Compression Permanent Magnet Variable Frequency Electric Drive Screw Compressor from Sanzhi (Henan) Compressor Co., Ltd.! Engineered with precision for industrial applications, this state-of-the-art Twin-Screw Air Compressor delivers unmatched value and superior performance. Available in an extensive range of power options, including 37KW, 45KW, 55KW, 75KW, 90KW, 110KW, 132KW, 160KW, 185KW, 200KW, and 250KW, this energy-efficient wonder ensures both efficiency and reliability. Opt for our top-rated compressor to experience unparalleled quality at a highly competitive price.
Meticulously Crafted Internal Structure - Frontside
Intricately Designed Internal Structure - Backside
Advanced Working Principle
In the realm of ideal air compression, the power required for single-stage transmission matches the cumulative power needed for multi-stage compression. However, real-world applications deviate due to coupling power losses, bearing friction, and the cooling effect of liquid viscosity. By strategically reducing the compression ratio per stage, these inefficiencies diminish, resulting in a total power demand for multi-stage compression that is more efficient and lower than that of single-stage compression.
The cutting-edge two-stage screw air compressor boasts a refined dual-stage rotary screw arrangement. Each stage is equipped with an active and a passive screw. Through an external power transmission mechanism, the active screw drives the passive one. The initial stage features a low-pressure screw group, while the subsequent stage employs a high-pressure screw group. Surrounding each screw, a sealing air film ensures optimal compression as the screws rotate, effectively managing the gas through three distinct phases: suction, pressurization, and discharge.
First Stage Compression: At the outset, the gas is compressed by a low-pressure screw group. Entering the screw compression chamber via the suction valve, the gas undergoes gradual compression under the high-speed rotation of the screw rotors, subsequently being directed to the secondary compression stage.
Second Stage Compression: Here, the gas is channeled into a more confined screw space, experiencing compression at elevated temperatures and pressures. This stage concludes with the opening of the exhaust valve, allowing the expulsion of the high-pressure gas from the system.
Natural air, filtered through an air filter, enters the first compression stage and mixes with a small amount of lubricating oil in the compression chamber. This blended gas is simultaneously compressed to an intermediate pressure. As the compressed gas traverses the cooling channel, it contacts substantial oil mist, significantly reducing its temperature. This cooled, compressed gas is then subjected to further compression in the second stage rotor, reaching the final exhaust pressure. The entire process culminates as the gas is expelled through the exhaust valve.
1) High Efficiency of PM Motor:The constant torque range and weak magnetic range of our permanent magnet motor are significantly wider, delivering 20-30% higher efficiency compared to regular motors. Regardless of frequency, the motor maintains unrivaled efficiency, ensuring peak performance consistently.
2) Motor Maintenance-Free:Our permanent magnet motor is ingeniously designed without internal bearings, eliminating the need for costly bearing maintenance and replacement.
3) Integrated Frequency Converter: Utilizing China's premier frequency system, it offers extensive speed regulation with high precision. Tailored to actual gas demand, the system excels in energy conservation, making it exceptionally efficient.
4) No Transmission Loss: The innovative embedded integrated shaft design directly connects the permanent magnet motor and compressor, resulting in a more compact structure. With no couplings or other transmission parts, it ensures 100% transmission efficiency.
5) Variable Frequency Start and Soft Start:These features significantly reduce the impact on power grid equipment, preventing potential damage to electrical components.
6) Reduce Energy Consumption: With a frequency conversion range of 25% to 100% (compared to the ordinary range of 50% to 100%), our system delivers over 30% energy savings versus fixed-speed compressors. It also outperforms standard variable frequency compressors by about 5%, with even greater savings when system gas consumption fluctuates.
7) Two-Stage Compression Unique Air End:Our two-stage compression screw machine features a uniquely designed air end, combining the first and second-stage compression rotors in a single case. Driven directly by gears, each rotor achieves optimal linear speed, greatly enhancing compression efficiency.
8) Internal Spray Curtain Cooling Method: The high energy-saving internal spray curtain cooling method delivers superior cooling, significantly reducing compressed air temperatures. This near-isothermal compression minimizes pressure loss and improves overall compression efficiency.
9) Reduce Internal Leakage:By adopting two-stage compression, we lower the compression ratio for each stage, reducing internal leakage from high to low pressure ends and enhancing volume efficiency.
10) Noise Reduction:The two-stage compression process reduces the compression ratio, greatly decreasing operational noise, especially during unloading.
11) Easy Maintenance and Service:Besides the screw air end, the two-stage compressor unit's systems and structures are similar to single-stage compression units, simplifying maintenance and usage for users.
| 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. |
1. Unparalleled Price Advantage
By eliminating the middleman, we deliver industry-leading ex-factory prices. This ensures you gain a significant market edge with our competitively priced, top-tier compressors.
2. Direct Transactions
Experience the assurance of factory-direct products, guaranteeing premium quality and cost-efficiency for all your air compression needs.
3. Tailored OEM & ODM Services
Leverage our factory's exceptional production and management capabilities to receive customized OEM/ODM services that perfectly align with your unique requirements.
4. Bespoke Customization Services
We invite orders for non-standard and export specifications, accommodating various voltage, power, and pressure needs. Reach out to us to cater to your specific demands.
5. Small Order Acceptance
Evaluate the superior performance of our products with a small trial order, ensuring that they meet and exceed your quality expectations.
6. Swift Delivery
Receive high-quality products with a commitment to timely and reliable delivery, ensuring your operational efficiency.
7. Comprehensive Authorization
Empower your sales strategy with our full authorization certificates, granting you the confidence to represent and sell SANZHI brand products effectively.
Sanzhi (Henan) Compressor Co., Ltd. stands as a premier manufacturer with a wealth of over 10 years of expertise in crafting top-quality screw air compressors and vacuum pumps. Our expansive range encompasses normal and low-pressure screw air compressors, permanent magnet frequency conversion screw air compressors, twin-stage compression screw air compressors, specialized screw air compressors for laser cutting, versatile single-tank and double-tank mobile screw air compressors, both electric and diesel-powered, as well as screw vacuum pumps. Discover unparalleled engineering excellence with our diverse product lineup.
Our production prowess is powered by cutting-edge, lean multi-air compressor assembly lines, ensuring unmatched efficiency. With a dedicated team exceeding 50 professionals, we continually refine our management systems, including ERP, to minimize lead times and guarantee rapid delivery of superior products.
Our commitment to excellence is reflected in our ISO9001 quality management system certification. We uphold rigorous quality management standards, meticulously implementing stringent quality control measures. Each machine is subjected to comprehensive material, production, and pre-delivery inspections, ensuring the highest standards of quality.
Our exceptional customer service begins with expert pre-sales guidance, helping clients select the ideal air equipment tailored to their facilities, complete with high customization options in appearance and configuration. We excel in crafting OEM solutions to meet unique dealer requirements. Our after-sales team, composed of skilled sales and service professionals, ensures swift and efficient responses to all customer inquiries and needs.
At Sanzhi (Henan) Compressor Co., Ltd., we are unwavering in our commitment to deliver reliable and superior products. We focus on fostering enduring relationships with our customers, ensuring efficient delivery, high-quality machines, and competitive pricing. Trust us to provide exceptional compressed air solutions that meet your every need.
Located in Xinzheng City, Henan Province, China, our factory is easily accessible. We offer complimentary pick-up services from Xinzheng International Airport, just 30 kilometers away-a short one-hour journey to our facility. We warmly invite you to visit us and experience our operations firsthand!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a seasoned manufacturer of screw air compressors, boasting over a decade of experience.
Q2. How do you control quality?
A: 1. Rigorous inspection of raw materials.
2. Stringent 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. Required air delivery capacity (Unit: CFM or m³/Min)
2. Desired working pressure (Unit: PSI, Bar, or Mpa)
3. Voltage and frequency specifications of your country (V/Hz)
4. Any additional accessories needed, such as air tanks, filters, or air dryers.
Provide this information, and we will engineer the perfect solution tailored 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 is the available voltage air compressor?
A: Sanzhi offers a comprehensive range of voltage options including 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, 440v/60hz/3p, with customization available to meet your specific requirements.
Q6. How long is the delivery time?
A: For our standard voltage models, experience expedited delivery within just 15 working days from order confirmation. For non-standard models, please feel free to contact our dedicated and knowledgeable sales team for personalized assistance.
Q7. What's the payment term?
A: Secure your order with a 30% T/T deposit, followed by a 40% T/T payment before shipment. The remaining 30% T/T is due upon presentation of the B/L copy. We are pleased to accept payments in both USD and RMB for your convenience.
Q8. How about your warranty?
A: Enjoy unmatched peace of mind with our comprehensive warranty: one year for the entire machine and an extended two-year warranty specifically for the screw air compressor, excluding consumable spare parts.
Q9. What about the maintenance?
A: The first maintenance is required after 500 hours of operation, with regular maintenance every 2000-3000 hours thereafter. Always take the actual working environment into account to optimize performance.
Q10. Can machines be run in high-temperature environments?
A: Absolutely, our machines are meticulously engineered to perform efficiently in high-temperature environments, with a robust working temperature range from -20° to 45° (-4ºF to 113ºF).
Q11. Do you offer OEM service?
A: Yes, we are proud to offer both OEM and ODM services, supported by our professional design team. Bring your innovative ideas to life with our expertise.
Q12. How long could your air compressor be used?
A: Typically, our air compressors boast an impressive lifespan exceeding 10 years, ensuring long-term reliability and performance.
Q13. Will you provide some spare parts for the machines?
A: Certainly, we provide essential spare parts to ensure the seamless and uninterrupted operation of your machines.
Q14. How about your after-sales service?
A: We offer comprehensive after-sales support, including detailed online installation and commissioning instructions. Additionally, our engineers are available for on-site training and installation assistance to ensure optimal performance.
Audited Supplier 
){kind=link}
){kind=link}