Introducing the revolutionary Low-Pressure Compressor from Sanzhi (Henan) Compressor Co., Ltd.! This groundbreaking Two-Stage Compression Permanent Magnet Variable Frequency Drive (VFD) Screw Air Compressor is a true masterpiece of engineering, designed to elevate industrial performance to new heights. With an extensive array of power options, including 15KW, 22KW, 30KW, 37KW, 45KW, 55KW, 75KW, 90KW, 110KW, 132KW, 160KW, 185KW, 200KW, and 250KW, this versatile powerhouse promises unmatched efficiency and reliability. Transform your operations with this cutting-edge solution, expertly crafted to cater to the diverse and challenging needs of today's advanced industries.
Internal Structure Frontside
Internal Structure Backside
Working Principle
In the realm of air compression, the theoretical energy needed for single-stage pressure transmission matches the total energy demands of multi-stage compression. However, in practical applications, factors such as coupling power losses, bearing friction, and the cooling effects of fluid viscosity lead to increased operational power usage. By reducing the compression ratio at each stage, these inefficiencies can be minimized. As a result, the overall power consumption for multi-stage compression is notably lower than for single-stage compression.
Introducing our state-of-the-art two-stage screw air compressor, featuring an exceptionally advanced twin-stage rotary screw mechanism. This revolutionary system includes an active screw in each stage that drives a passive screw through a formidable external power transmission setup. The initial stage utilizes a low-pressure screw group, while the subsequent stage employs a high-pressure screw group. Each screw is precisely encased within a sealing air film to ensure optimal performance. During operation, the gas follows a tri-phase process: suction, pressurization, and exhaust, guaranteeing unmatched compression efficiency.
First Stage Compression: At the onset of our two-stage screw air compressor's operation, gas is effectively compressed using a low-pressure screw group. The gas is initially drawn into the compression chamber through the suction valve, where the screw rotor's rapid rotation compresses it, setting the stage for a seamless transition to the second stage.
Second Stage Compression: In the second stage screw group, the gas undergoes further compression within a more confined screw space, reaching elevated temperatures and pressures. The process reaches its pinnacle as the exhaust valve opens, allowing the high-pressure gases to be released from the system, thereby completing the compression cycle.
Natural air is initially drawn through the air filter into the first compression stage, where it blends with a small amount of lubricating oil. This mixture is compressed to an intermediate pressure level. Following this, the gas is directed into a cooling channel, where it interacts with a significant amount of oil mist, substantially reducing its temperature. The cooled, compressed gas then progresses to the second-stage rotor for its final compression to the ultimate exhaust pressure. Once fully compressed, the gas exits the system through the exhaust valve, concluding the compression cycle.
1) High efficiency of PM motor:Discover the pinnacle of efficiency with our cutting-edge permanent magnet motor. Its expansive constant torque and weak magnetic ranges offer an impressive 20-30% efficiency enhancement over conventional motors. Regardless of operating away from the rated frequency, the motor maintains peak efficiency, ensuring top-tier performance consistently.
2) Two-stage compression unique air end:Introducing our groundbreaking two-stage compression screw machine with an ingeniously designed air end. The integration of first and second-stage compression rotors in a single casing, directly gear-driven, allows each rotor to reach ideal linear speeds, thereby optimizing compression efficiency to its fullest potential.
3) Integrated frequency converter: Fitted with China's leading frequency system, this compressor provides extensive speed modulation and precision. Users can tailor the frequency to actual gas requirements, resulting in substantial energy savings and boosting operational efficacy.
4) Reduce internal leakage:Our two-stage compression technology decreases each stage's compression ratio, effectively cutting down internal leakage from high-pressure to low-pressure ends and significantly boosting volumetric efficiency.
5) Variable frequency start and the soft startof the motor is executed flawlessly, drastically diminishing power grid equipment impact and averting potential harm to electrical components.
6) Reduce energy consumption: With frequency conversion ranging from 25% to 100%, surpassing the typical 50% to 100% range, this system ensures energy savings over 30% compared to fixed-speed compressors. Even when compared to standard variable frequency compressors, it offers around 5% enhanced energy efficiency, with superior savings for systems facing variable gas demands.
7) No transmission loss: The innovative permanent magnet motor and compressor utilize an integrated shaft direct connection, offering a compact design. Eliminating couplings and other transmission parts, it achieves an unmatched 100% transmission efficiency.
8) Air cooling method: Our highly energy-efficient air cooling system provides exceptional cooling performance, significantly lowering the compressed air temperature. This near-isothermal compression minimizes stage pressure loss, reduces the compression ratio, and elevates overall efficiency.
9)Smart Touch Controller:Our sophisticated built-in intelligence demands minimal manual intervention. Featuring a high-precision color electronic display, it offers clear graphical interfaces, maintenance guidance, fault alerts, and safety shutdown notifications for a seamless operational experience.
10)Special Type Intake Valve:The automatically controlled opening ensures smooth fuel injection and lubricating oil flow.
Ultra-low oil circuit loss enhances overall system efficiency.
The always-open solenoid valve closes automatically during emergency stops to prevent oil injection, ensuring system safety.
11)Excellent Air Filter:Our premium air filter excels in air purification, ensuring a pristine air system through a tri-stage filtration process for top-notch air quality. It efficiently removes steam and dust, complying with rigorous emission standards.
12)High-Quality Soundproof Cotton:Our streamlined noise reduction casing, in harmony with premium soundproof cotton, minimizes operational vibrations and significantly enhances noise reduction, creating a quieter, more productive workspace.
13) Motor maintenance-free:Our permanent magnet motor, devoid of internal bearings, eliminates the necessity for motor bearing maintenance and replacement, significantly reducing long-term upkeep costs and increasing dependability.
14) Noise reduction:Immerse yourself in a world of unrivaled calmness with our revolutionary two-stage compression technology. This avant-garde system expertly minimizes the compression ratio, leading to a substantial decrease in operational noise, particularly noticeable during unloading phases. Revel in a quieter, more productive work environment and boost your efficiency with the Professional Industrial Screw Compressor brought to you by Sanzhi.
15) Seamless Maintenance and Service:Our breakthrough two-stage compressor unit is designed to retain the well-known structure and systems of a traditional single-stage compressor. By cleverly omitting only the screw air end, we guarantee that maintenance and service are as straightforward and user-friendly as ever. Experience effortless upkeep and continuous, top-notch performance with Sanzhi's Professional Industrial Screw 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. Competitive Pricing
Experience unparalleled value by joining forces with us at Sanzhi (Henan) Compressor Co., Ltd. By sourcing directly, you unlock the gateway to exceptional factory-direct pricing, ensuring you remain a leader in the competitive marketplace.
2. Direct Transactions
Harness the power of cost-efficiency and dependability with our direct transaction model. Enjoy the peace of mind that comes from procuring your products straight from our factory, guaranteeing unmatched savings and trust.
3. OEM & ODM Services
Tap into our remarkable production and management prowess. Our bespoke OEM and ODM services are designed to align with your exact specifications, ensuring every unique need is expertly met with precision.
4. Customized Solutions
We proudly excel in handling non-standard and export-specific orders. Catering to diverse voltage, power, and pressure requirements, we invite you to share your customization desires and enjoy solutions that seamlessly fit your vision.
5. Small Order Acceptance
Start your journey with a trial order and experience the exceptional quality that distinguishes our products. This initial step allows you to evaluate our offerings thoroughly, ensuring absolute satisfaction before expanding your order.
6. Rapid Delivery
Revel in the certainty and reliability of our expedited delivery service. We pledge to deliver your premium products with speed and precision, ensuring your operations remain fluid and uninterrupted.
7. Comprehensive Authorization
Elevate your distribution prowess with our extensive authorization certificates. Market and sell SANZHI brand products with absolute confidence, supported by robust and comprehensive certification.
Sanzhi (Henan) Compressor Co., Ltd is a renowned and well-respected manufacturer that specializes in innovative screw air compressors and screw vacuum pumps. With over ten years of unmatched industry expertise, we offer a diverse and comprehensive range of products. Our lineup includes normal and low-pressure screw air compressors, permanent magnet frequency conversion screw air compressors, and two-stage compression screw air compressors. Additionally, we have specialized screw air compressors for laser cutting, along with single-tank and double-tank mobile screw air compressors. Our offerings also include both electric and diesel mobile screw air compressors, as well as cutting-edge screw vacuum pumps.
Our cutting-edge production facility is equipped with advanced multi-air compressor assembly lines, guaranteeing exceptional efficiency and precision in manufacturing. Backed by a dedicated team of over 50 highly skilled employees, we continually refine our management systems, including ERP, to significantly minimize lead times and ensure the rapid delivery of top-tier quality products.
Our meticulously crafted management systems are committed to maintaining the utmost quality standards. Proudly certified under the ISO9001 quality management system, we adhere to stringent quality control protocols. Each machine undergoes thorough inspections at various stages, from material and production checks to pre-delivery evaluations, ensuring unrivaled product reliability and excellence.
Our outstanding customer service begins with a pre-sales team offering expert guidance to help you select the perfect air equipment tailored to your unique needs. We provide extensive customization options, including appearance and configuration, and develop bespoke products to meet specific dealer demands through our OEM services. Our professional sales and service team is always ready to provide prompt and efficient post-sales support, swiftly addressing your needs.
At Sanzhi (Henan) Compressor Co., Ltd, we are steadfast in our commitment to delivering superior, reliable, and stable products. Dedicated to cultivating long-term relationships with our clients, we promise efficient delivery, top-quality machinery, and competitive pricing, ensuring you receive the best compressed air solution for your needs.
Nestled in the scenic Xinzheng City, Henan Province, China, our factory is ideally located just 30 kilometers from Xinzheng International Airport, approximately an hour's drive away. We warmly invite you to visit our facility and witness our exceptional offerings firsthand!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a distinguished manufacturer specializing in screw air compressors, proudly possessing over a decade of industry expertise.
Q2. How do you control quality?
A: 1. We conduct rigorous inspections of our raw materials to ensure they meet the highest quality standards.
2. Our meticulous installation process is closely monitored for precision.
3. Each machine undergoes a minimum of 5 continuous hours of testing prior to dispatch, ensuring optimal performance.
Q3. What information must I provide to get the suitable machine?
1. Your required air delivery capacity (Unit: CFM or m³/Min).
2. The desired working pressure (Unit: PSI, Bar or Mpa).
3. The voltage and frequency specifications of your country of residence (V/Hz).
4. Any additional accessories needed, such as an air tank, filters, or air dryers.
Share this information with us, and we will create a tailored solution just 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: At Sanzhi, we offer an extensive array of voltage options to cater to diverse needs, including 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, and 440v/60hz/3p. Moreover, we provide customization options to precisely match your unique specifications, ensuring optimal compatibility and satisfaction.
Q6. How long is the delivery time?
A: Our commitment to prompt service means that for standard voltage units, we ensure delivery within an efficient 15 working days post order confirmation. For non-standard requirements, we invite you to reach out to our dedicated sales team for tailored solutions.
Q7. What's the payment term?
A: Our flexible payment terms are designed for your convenience, comprising 30% T/T in advance, 40% T/T before shipment, and the balance 30% T/T upon presentation of the B/L copy. Transactions can be smoothly executed in either USD or RMB, accommodating your financial preferences.
Q8. How about your warranty?
A: We proudly stand behind our products with a comprehensive warranty, offering one year for the entire machine and an extended two years for the screw air compressor, with the exception of consumable spare parts. This ensures peace of mind and reliable performance for our valued customers.
Q9. What about the maintenance?
A: Optimal maintenance is pivotal to longevity. The initial maintenance is requisite after the first 500 hours of operation. Thereafter, maintenance should be diligently carried out every 2000-3000 hours, duly considering the actual working environment to ensure peak performance.
Q10. Can machines be run in high-temperature environment?
A: Absolutely! Our machines are expertly engineered to deliver exceptional performance in high-temperature settings, boasting a versatile working temperature range from -20° to 45° (-4ºF to 113ºF), ensuring reliability under demanding conditions.
Q11. Do you offer OEM service?
A: Certainly! We specialize in providing superior OEM & ODM services, supported by our adept professional design team. Your custom orders are warmly welcomed, and we are committed to bringing your visions to life with precision and expertise.
Q12. How long could your air compressor be used?
A: Our air compressors are meticulously engineered for remarkable longevity, typically surpassing an impressive 10 years of reliable service life, ensuring enduring performance and value.
Q13. Will you provide some spare parts for the machines?
A: Absolutely! We offer a comprehensive range of top-quality spare parts to ensure the seamless, efficient operation of your machinery. This commitment supports longevity and maintains peak performance, safeguarding your investment.
Q14. How about your after-sales service?
A: Our after-sales service is second to none, providing exceptional support that includes detailed online installation and commissioning guidance. When required, we also deploy skilled engineers for hands-on training and precise installation assistance, ensuring your complete satisfaction.
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