Unleash the Power with Sanzhi's 200KW 272HP Two-Stage Screw Compressor! As a trusted China supplier, we offer factory prices on our Permanent Magnet Variable Frequency Screw Air Compressor. Designed with high-quality centrifugal fans, this energy-saving marvel ensures high efficiency for industrial use. Perfect for stationary applications, our compressor is the epitome of performance and reliability.
Internal Structure Frontside
Internal Structure Backside
Working Principle
In an ideal air compression process, the power required for single-stage pressure transmission equals the sum of the power needed for multi-stage compression. However, actual compression sees increased working power due to coupling power loss, bearing friction, and cooling effects from liquid viscosity. Reducing the compression ratio at each stage minimizes useless power, making the total power for multi-stage compression less than that for single-stage compression.
The two-stage screw air compressor consists of a two-stage rotary screw system. Each stage features an active and a passive screw, with the active screw driving the passive screw via an external power transmission. The first stage employs a low-pressure rate screw group, while the second stage uses a high-pressure rate screw group. A sealing air film surrounds each screw, allowing gas compression through suction, pressurization, and exhaust.
First stage compression: The initial stage of the two-stage screw air compressor utilizes a low-pressure rate screw group to squeeze the gas. The gas enters the screw compression chamber via the suction valve, where it is progressively compressed and transferred to the second stage through the screw rotor's high-speed rotation.
Second stage compression: The second stage screw group compresses the gas within a tighter space at higher temperatures and pressures. The exhaust valve then opens to discharge high-pressure gases from the system.
Natural air enters the first compression stage through the air filter, mixing with a small amount of lubricating oil in the compression chamber. This combination compresses the gas to interstage pressure. The compressed gas then passes through a cooling channel, encountering oil mist that significantly reduces its temperature. The cooled gas enters the second-stage rotor for further compression to the final exhaust pressure, culminating in discharge through the exhaust valve, completing the entire compression process.
| 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 utilizes a high-speed rotating impeller to accelerate and decelerate the air. Air enters the impeller axially, which cools the motor faster than a general air-cooled fan. This process keeps the compressor running continuously, extending the compressor's service life.
1) High efficiency of PM motor:The constant torque and weak magnetic ranges are wider. The efficiency of the permanent magnet motor is 20-30% higher than that of a regular motor. Even when operating away from the rated frequency, it maintains extremely high efficiency.
2) Motor maintenance-free:The permanent magnet motor has no bearings, eliminating the cost of bearing maintenance and replacement.
3) Integrated frequency converter:Uses China's top frequency system, featuring a wide range of speed regulation and high precision. It modulates operation frequency based on actual gas demand, resulting in remarkable energy savings for the air compressor.
4) No transmission loss:The direct connection between the permanent magnet motor and compressor via an embedded integrated shaft creates a compact structure. With no coupling or other transmission parts, transmission efficiency reaches 100%.
5) Variable frequency start and soft startThe motor's variable frequency start and soft start significantly reduce impact on power grid equipment, preventing damage to electrical devices.
6) Reduce energy consumption:Frequency conversion ranges from 25% to 100% (ordinary frequency conversion is 50% to 100%). Compared to fixed-speed air compressors, energy savings exceed 30%. Compared to standard variable frequency compressors, savings are about 5%. The greater the fluctuation in system gas consumption, the more substantial the energy savings.
7) Two-stage compression unique air end:The two-stage compression design features a unique air end. It integrates the first and second-stage compression rotors in a single case, rotating them through gears to achieve optimal linear speeds and higher compression efficiency.
8) Internal spray curtain cooling method:Utilizes a high-energy-saving internal spray curtain cooling method, significantly reducing the temperature of compressed air. This nearly achieves isothermal compression, reduces pressure loss between stages, optimizes the compression ratio, and enhances compression efficiency.
9) Reduce internal leakage:Adopting two-stage compression reduces the compression ratio for each stage, decreasing internal leakage from high-pressure to low-pressure ends, thereby improving volume efficiency.
10) Noise reduction:Two-stage compression lowers the compression ratio, significantly reducing noise, especially during unloading.
11) Easy maintenance and service:The two-stage compressor unit, aside from the screw air end, retains similar systems and structures to single-stage compressors, facilitating maintenance and user convenience.
1. Competitive Pricing
We offer direct ex-factory prices, ensuring our customers have a competitive edge in the market.
2. Direct Transactions
Our products come straight from the factory, enabling us to provide more cost-effective solutions.
3. Tailored OEM & ODM Services
With robust production and management capabilities, our factory is equipped to offer comprehensive OEM/ODM services to meet your specific needs.
4. Customization to Your Specifications
We accept non-standard orders, including export specifications and custom voltage/power/pressure requirements. Contact us to discuss your unique demands.
5. Small Order Friendly
We accommodate small trial orders to give you the opportunity to test the superior quality of our products.
6. Prompt Delivery
Enjoy high-quality products delivered to you in a timely manner.
7. Comprehensive Authorization
For our distributors, we provide full authorization certificates to facilitate the sale of our SANZHI brand products with confidence.
Sanzhi (Henan) Compressor Co., Ltd is a distinguished manufacturer specializing in the production of screw air compressors and screw vacuum pumps. With over a decade of expertise, our extensive product lineup features normal and 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, and various mobile screw air compressors, including single-tank, double-tank, electric, and diesel variants, along with premium screw vacuum pumps.
Utilizing advanced multi-air compressor assembly lines, our production processes are lean and modern, ensuring maximum efficiency. With a dedicated team of over 50 employees, we continuously refine our management systems, including ERP, to expedite lead times and deliver top-tier products swiftly.
Our commitment to quality is unwavering, as evidenced by our ISO9001 certification. We rigorously adhere to stringent quality management systems and standard quality control processes, ensuring each machine undergoes thorough material, production, and pre-delivery inspections.
Our exceptional customer service begins with pre-sales, where we provide expert guidance to help customers choose the right air equipment, offering high customization options for appearance and configuration. We also excel in creating unique OEM products tailored to the specific needs of dealers. Our professional sales and service team ensures a rapid response for any after-sales inquiries.
At Sanzhi (Henan) Compressor Co., Ltd, our mission is to deliver superior, stable products and build lasting customer relationships. With efficient delivery, top-quality machines, and competitive pricing, we are your trusted partner for all your compressed air solutions.
Located in Xinzheng City, Henan Province, China, our factory is conveniently accessible. We offer pickup from Xinzheng International Airport, just 30 kilometers away, making it a mere one-hour journey to our premises. We warmly welcome you to visit our company!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a professional manufacturer specializing in screw air compressors, boasting over 10 years of industry experience.
Q2. How do you control quality?
A: 1. We conduct rigorous inspections of all raw materials.
2. Our installation procedures are meticulously controlled.
3. Each machine must undergo at least 5 hours of continuous testing before leaving our factory.
Q3. What information must I provide to get the suitable machine?
1. The required air delivery capacity (Unit: CFM or m³/Min)
2. The desired working pressure (Unit: PSI, Bar or Mpa)
3. The voltage and frequency in your country of residence (V/Hz)
4. Whether additional accessories such as an air tank, filters, and/or air dryers are needed.
Provide us with this information, and we will offer a tailored 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 various voltages including 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, 440v/60hz/3p, and can customize according to your specific requirements.
Q6. How long is the delivery time?
A: For standard voltage units, delivery is guaranteed within 15 working days post order confirmation. For non-standard specifications, please contact our dedicated sales team for precise timelines.
Q7. What's the payment term?
A: Payment terms are as follows: 30% T/T in advance, 40% T/T prior to shipment, and the remaining 30% T/T upon presentation of the B/L copy. We accept payments in both USD and RMB.
Q8. How about your warranty?
A: We offer a comprehensive one-year warranty for the entire machine and an extended two-year warranty for the screw air compressor, excluding consumable spare parts.
Q9. What about the maintenance?
A: Initial maintenance is required after 500 operational hours. Subsequent routine maintenance should be performed every 2000-3000 hours, contingent on 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 proudly offer both OEM and ODM services, backed by our expert design team, ensuring customized solutions for your needs.
Q12. How long could your air compressor be used?
A: Generally, our air compressors have a robust lifespan exceeding 10 years.
Q13. Will you provide some spare parts for the machines?
A: Yes, we certainly provide spare parts for our machines to ensure seamless operation and longevity.
Q14. How about your after-sales service?
A: We offer comprehensive after-sales support including online installation and commissioning guidance, and can arrange for our engineers to assist with training and on-site installation.
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