Discover the 200KW 272HP Screw-Compressor from a Leading China Supplier. Offering Factory Prices on our Permanent Magnet Variable Frequency Two-Stage Screw Air Compressor, this powerhouse is engineered with top-tier Centrifugal Fans. Experience unmatched Energy Saving and High Efficiency in a Stationary Type design, perfect for Industrial Use.
Internal Structure Frontside
Internal Structure Backside
Working Principle
In an ideal air compression process, the power needed for single-stage pressure transmission equals the collective power required for multi-stage compression. However, real-world scenarios entail higher power demands due to transmission power loss, bearing friction, and liquid viscosity cooling effects. By minimizing the compression ratio at each stage, the total power required for multi-stage compression can be significantly lower than that of single-stage compression, enhancing efficiency and reducing unnecessary power usage.
The two-stage screw air compressor features a dual rotary screw system. Each stage includes an active and a passive screw, where the active screw drives the passive screw through an external power transmission mechanism. The first stage employs a low-pressure screw group, and the second stage utilizes a high-pressure screw group. Sealing air films around each screw facilitate the compression process through three phases: suction, pressurization, and exhaust.
First stage compression: The initial stage in the two-stage screw air compressor utilizes a low-pressure screw group. Here, gas enters the screw compression chamber via the suction valve and is compressed as the screw rotor spins at high speed. This gas is then transferred to the second stage for further compression.
Second stage compression: In the second stage, the gas enters a more confined screw space, where it is subjected to higher pressures and temperatures. The exhaust valve opens to expel the high-pressure gases from the system, finalizing the compression process.
Natural air first enters through the air filter and mixes with a small amount of lubricating oil in the compression chamber. This mixture is compressed to interstage pressure and then cooled significantly via contact with oil mist in the cooling channel. The cooled gas enters the second-stage rotor, undergoing a secondary compression to the final exhaust pressure. The entire process culminates as the compressed gas is expelled through the exhaust valve, completing the air compression cycle.
| 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, leveraging advanced German technology, employs a high-speed rotating impeller to dynamically accelerate and decelerate air. This innovative design facilitates axial air entry into the impeller, significantly enhancing motor cooling efficiency. Compared to conventional air-cooled fans, this mechanism allows for faster temperature reduction, ensuring continuous, uninterrupted compressor operation, and extending the compressor's service life.
1) High efficiency of PM motor:The permanent magnet (PM) motor boasts an extended constant torque range and a broader weak magnetic range. Its efficiency surpasses that of regular motors by 20-30%. Remarkably, the PM motor maintains its high efficiency even when operating away from the rated frequency, ensuring optimal performance under varying conditions.
2) Motor maintenance-free:The permanent magnet motor is designed without internal bearings, eliminating the costs associated with motor bearing maintenance and replacement, further reducing overall maintenance expenses.
3) Integrated frequency converter: Incorporating China's top-tier frequency system, our compressor features a wide speed regulation range and exceptional precision. The system adjusts to actual gas demand, delivering remarkable energy savings and optimizing operational efficiency.
4) No transmission loss: The compressor features a direct shaft connection structure with the embedded permanent magnet motor, ensuring a compact design. This eliminates the need for couplings and other transmission components, achieving 100% transmission efficiency.
5) Variable frequency start and soft startof the motor significantly reduce impact on power grid equipment, preventing damage to electrical systems and enhancing overall system longevity.
6) Reduced energy consumption: With a frequency conversion range spanning from 25% to 100% (compared to the standard 50% to 100%), our system offers over 30% energy savings compared to fixed-speed compressors. Additionally, it provides approximately 5% more energy savings than typical variable frequency compressors, with greater benefits for systems with fluctuating gas consumption.
7) Unique two-stage compression air end:Featuring a distinctive design, the two-stage compression screw machine integrates both the first and second-stage compression rotors within a single casing. Each rotor is individually gear-driven to achieve optimal linear speed, maximizing compression efficiency.
8) Internal spray curtain cooling method: Utilizing a high-efficiency internal spray curtain cooling technique, this method provides superior cooling effects, significantly lowering compressed air temperatures. This achieves near-isothermal compression, reduces pressure loss between stages, lowers the compression ratio, and enhances overall compression efficiency.
9) Reduced internal leakage:The two-stage compression system lowers the compression ratio for each stage, minimizing internal leakage between high and low-pressure ends, and improving volumetric efficiency.
10) Noise reduction:The reduced compression ratio in the two-stage system also significantly diminishes noise levels, particularly during unloading operations, ensuring a quieter working environment.
11) Easy maintenance and service:Despite the advanced two-stage compression design, the system's other components and structures remain fundamentally similar to those of single-stage compressors, ensuring ease of maintenance and user convenience.
1. Competitive Pricing Advantage
We offer customers direct ex-factory prices, ensuring they remain highly competitive in the market.
2. Direct Transactions
All our products are supplied directly from the factory, allowing us to offer more cost-effective solutions.
3. Comprehensive OEM & ODM Services
Our robust production and management capabilities enable us to deliver exceptional OEM/ODM services tailored to your needs.
4. Personalized Customization Service
We accept non-standard, export orders, and customizations in voltage, power, pressure, etc. Reach out to us with your specific requirements.
5. Small Order Acceptance
Place a small trial order to evaluate the superior quality of our products.
6. Rapid Delivery
Experience timely delivery of our high-quality products.
7. Full Authorization
For distributors, we provide complete authorization certificates, empowering you to sell our SANZHI brand products with confidence.
Successful Cases
Sanzhi (Henan) Compressor Co., Ltd is a premier manufacturer excelling in the production of screw air compressors and screw vacuum pumps, boasting over a decade of industry experience. Our diverse product portfolio features state-of-the-art screw air compressors and vacuum pumps including normal pressure/low-pressure screw air compressors, permanent magnet frequency conversion models, two-stage compression units, screw air compressors for laser cutting, single-tank and double-tank mobile screw air compressors, electric and diesel mobile screw air compressors, and advanced screw vacuum pumps.
In production, our cutting-edge assembly lines facilitate the most efficient manufacturing processes. Thanks to our dedicated team of over 50 employees, we continuously optimize management systems such as ERP to minimize lead times and ensure the swift delivery of high-quality products.
In management, our factory proudly holds ISO9001 quality management system certification. We adhere to stringent quality standards, implementing rigorous quality control processes. Every machine undergoes comprehensive inspections, including material checks, production assessments, and pre-delivery evaluations, ensuring only the finest products leave our facility.
In customer service, we excel in pre-sales consultation, offering professional guidance to help customers select the ideal air equipment tailored to their specific needs. Our high level of customization extends to both appearance and configuration, and we provide OEM services to meet unique dealer demands. For after-sales support, our professional sales and service team ensures prompt and efficient customer responses.
At Sanzhi (Henan) Compressor Co., Ltd, we are committed to delivering superior, stable products and fostering long-term customer relationships. With efficient delivery, top-quality machines, and competitive pricing, we are your reliable partner for comprehensive compressed air solutions.
Our factory is conveniently located in Xinzheng City, Henan Province, China. We offer complimentary pick-up services from Xinzheng International Airport, located just 30 kilometers away-about an hour's drive. We warmly welcome your visit to our company!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a seasoned manufacturer specializing in screw air compressors, backed by over 10 years of expertise.
Q2. How do you control quality?
A: 1. We rigorously inspect all raw materials.
2. Installation procedures are meticulously controlled.
3. Each machine undergoes a minimum of 5 hours of continuous testing before leaving our factory to ensure optimal performance.
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 for your country (V/Hz)
4. Additional accessories needed (e.g., air tanks, filters, air dryers).
Provide these details, and we will design 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 air compressors are available in various voltages including 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, 440v/60hz/3p, and can be customized to meet your specific requirements.
Q6. How long is the delivery time?
A: For standard voltage, your order will be processed within a swift 15 working days after confirmation. For non-standard specifications, kindly reach out to our sales team for detailed timelines.
Q7. What's the payment term?
A: We require 30% T/T upfront, another 40% T/T before shipment, and the final 30% T/T upon receipt of the B/L copy. Payments can be made 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 specifically for the screw air compressor, excluding consumable spare parts.
Q9. What about the maintenance?
A: The initial maintenance should be conducted after 500 hours of operation. Subsequent maintenance is required every 2000-3000 hours, adjusted according to 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°C to 45°C (-4°F to 113°F).
Q11. Do you offer OEM service?
A: Yes, we proudly offer OEM and ODM services, facilitated by our professional design team. Your custom orders are highly welcome.
Q12. How long could your air compressor be used?
A: Typically, our air compressors have a lifespan exceeding 10 years.
Q13. Will you provide some spare parts for the machines?
A: Certainly, we will provide spare parts for your machines.
Q14. How about your after-sales service?
A: We offer comprehensive after-sales support, including online instructions for installation and commissioning. Additionally, our engineers are available for training and installation assistance.
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