Introducing the groundbreaking Low-Pressure Compressor by Sanzhi (Henan) Compressor Co., Ltd.! Meticulously engineered to elevate industrial excellence, this state-of-the-art Two-Stage Compression Permanent Magnet Variable Frequency Drive Screw Air Compressor stands as a testament to innovation and reliability. Designed to cater to a wide array of industrial needs, it offers a vast selection of power options, including 15KW, 22KW, 30KW, 37KW, 45KW, 55KW, 75KW, 90KW, 110KW, 132KW, 160KW, 185KW, 200KW, and an impressive 250KW. This versatile marvel ensures unmatched efficiency and unwavering dependability, making it the ideal choice for those seeking to elevate their operations. Experience the pinnacle of precision and performance with this cutting-edge solution, crafted to surpass the diverse and rigorous demands of today's dynamic industries.
Internal Structure Frontside
Internal Structure Backside
Working Principle
In the realm of air compression, the ideal scenario envisions the energy needed for a single-stage compression to match that required for a multi-stage process. Yet, in reality, energy losses arise from coupling power losses, bearing friction, and the viscosity-induced cooling of fluids, resulting in increased power demands. By optimizing the compression ratio in each stage, these inefficiencies are minimized. Thus, the overall power consumption for multi-stage compression becomes significantly lower than that of single-stage compression, offering substantial energy savings.
Introducing our state-of-the-art two-stage screw air compressor, designed with an innovative dual-stage rotary screw architecture. This revolutionary system integrates a dynamic screw at each stage that drives a complementary passive screw through a powerful external transmission. The initial stage features a low-pressure screw group, while the subsequent stage utilizes a high-pressure screw group. Each screw is precisely enveloped in a sealing air film. During operation, the gas seamlessly transitions through a three-phase process-intake, compression, and discharge-guaranteeing exceptional compression efficiency.
First Stage Compression: At the forefront of our advanced two-stage screw air compressor is the initial compression phase, where gas is adeptly compressed using a low-pressure screw group. Here, gas is drawn into the compression chamber through the suction valve, where the rapid rotation of the screw rotor compresses it effectively before it is smoothly conveyed to the second stage.
Second Stage Compression: The second stage is where the gas is further compressed within a tightly confined screw space, achieving elevated temperatures and pressures. As the process reaches its zenith, the exhaust valve opens, releasing the high-pressure gases, thus completing the sophisticated compression cycle.
The air compression journey begins with natural air being drawn through an air filter into the first compression stage, where it mingles with a minimal amount of lubricating oil. This blend is compressed to an intermediate pressure and then progresses into a cooling channel, interacting with an abundance of oil mist which significantly reduces its temperature. The cooled, compressed gas then advances to the second-stage rotor for its final compression, reaching the ultimate exhaust pressure. Upon full compression, the gas exits the system through the exhaust valve, marking the completion of an efficient compression cycle.
1) High efficiency of PM motor:Experience unparalleled efficiency with our advanced permanent magnet motor. Its constant torque range and weak magnetic range are significantly wider, delivering an efficiency boost of 20-30% over conventional motors. Even when operating away from the rated frequency, the motor sustains its high efficiency, ensuring optimal performance at all times.
2) Two-stage compression unique air end:Our revolutionary two-stage compression screw machine features a uniquely designed air end. The first and second-stage compression rotors are combined within a single casing and driven directly by gears, enabling each rotor to achieve the optimal linear speed and thereby maximizing compression efficiency.
3) Integrated frequency converter: Equipped with China's premier frequency system, the air compressor offers a wide range of speed regulation and high precision. Users can modulate the frequency according to actual gas demand, leading to remarkable energy savings and operational efficiency.
4) Reduce internal leakage:Employing two-stage compression technology reduces the compression ratio for each stage, thereby minimizing internal leakage from the high-pressure end to the low-pressure end while significantly enhancing volumetric efficiency.
5) Variable frequency start and the soft startof the motor are achieved, significantly reducing the impact on power grid equipment and preventing damage to electrical components.
6) Reduce energy consumption: Our frequency conversion operates from 25% to 100%, a significant improvement over the ordinary 50% to 100% range. Compared to fixed-speed air compressors, energy savings can exceed 30%. Even against regular variable frequency compressors, it offers around 5% more energy efficiency, with greater savings for systems with fluctuating gas demands.
7) No transmission loss: The permanent magnet motor and compressor utilize an embedded integrated shaft direct connection structure, making it more compact. With no couplings or other transmission parts, the transmission efficiency reaches an unparalleled 100%.
8) Air cooling method: Our high energy-efficient air cooling method delivers excellent cooling performance, significantly reducing the temperature of compressed air. This near-isothermal compression also minimizes pressure loss between stages, reducing the compression ratio and enhancing overall efficiency.
9)Smart Touch Controller:Our state-of-the-art built-in intelligence requires minimal manual operation. Featuring a high-precision color electronic screen, it provides clear graphical displays, maintenance information, fault alarms, and safety shutdown alerts for seamless operation.
10)Special Type Intake Valve:Automatically controlled opening ensures smooth engine fuel injection and lubricating oil circulation.
Ultra-low oil circuit loss enhances overall efficiency.
The normally open solenoid valve automatically closes during emergency stops to prevent oil injection, ensuring system safety.
11)Excellent Air Filter:Our top-tier air filter boasts exceptional air purification capabilities, ensuring a clean air system with three-stage filtration for superior air quality. It efficiently removes steam and dust, meeting stringent emission standards.
12)High-Quality Soundproof Cotton:Our compact noise reduction housing, coupled with high-quality soundproof cotton, minimizes operational vibration and significantly enhances noise reduction, ensuring a quieter, more efficient workspace.
13) Motor maintenance-free:Our permanent magnet motor, free of internal bearings, eliminates the need for motor bearing maintenance and replacement, reducing long-term maintenance costs and enhancing reliability.
14) Noise reduction:Experience unparalleled tranquility with our state-of-the-art two-stage compression technology. This revolutionary system significantly lowers the compression ratio, dramatically reducing operational noise, especially during unloading. Delight in a quieter, more efficient working environment and elevate your productivity with the Professional Industrial Screw Compressor by Sanzhi. Designed for those who demand both precision and peace, this compressor transforms your workspace into a sanctuary of productivity.
15) Effortless Maintenance and Service:Our innovative two-stage compressor unit maintains the familiar structure and systems of a single-stage compressor. By only excluding the screw air end, we ensure that maintenance and service remain straightforward and user-friendly for everyone. Enjoy hassle-free upkeep and consistent, optimal performance with Sanzhi's Professional Industrial Screw Compressor. Embrace simplicity and reliability, knowing your compressor is engineered for ease.
| 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. When you source directly from Sanzhi (Henan) Compressor Co., Ltd., you unlock access to unbeatable factory-direct prices, ensuring you remain at the cutting edge of a highly competitive market.
2. Direct Transactions
Maximize cost-efficiency and gain the peace of mind that comes with direct transactions. Our entire range is delivered straight from the factory to you, guaranteeing the utmost savings and reliability.
3. OEM & ODM Services
Unleash the full potential of our extensive production and management prowess. We offer bespoke OEM and ODM services, meticulously tailored to your distinct specifications, ensuring your unique requirements are flawlessly fulfilled.
4. Customized Solutions
We excel in fulfilling non-standard and export orders, meeting specific voltage, power, and pressure demands. Contact us with your customization needs, and allow us to craft solutions that are precisely aligned with your expectations.
5. Small Order Acceptance
Begin your journey with us by placing a small trial order and experience firsthand the exceptional quality of our products, ensuring your complete satisfaction before expanding your commitment.
6. Rapid Delivery
Embrace the assurance of our fast and dependable delivery services. We are committed to delivering your high-quality products swiftly and reliably, ensuring your operations run seamlessly and without delay.
7. Comprehensive Authorization
Amplify your distribution capabilities with our all-encompassing authorization certificates. Market and sell SANZHI brand products with absolute confidence, supported by our thorough certification process.
Sanzhi (Henan) Compressor Co., Ltd. stands as a distinguished and reputable manufacturer in the realm of advanced screw air compressors and vacuum pumps. Our over ten years of expertise have allowed us to create a versatile product lineup, encompassing normal and low-pressure screw air compressors, permanent magnet frequency conversion screw air compressors, two-stage compression screw air compressors, laser cutting-specific models, and both single-tank and double-tank mobile screw air compressors. Furthermore, our offerings include electric and diesel mobile screw compressors, alongside innovative screw vacuum pumps.
Our cutting-edge production facility is outfitted with advanced multi-air compressor assembly lines, ensuring exceptional precision and efficiency. Supported by a team of over 50 highly skilled professionals, we are committed to refining our management systems, including ERP, to drastically cut lead times and assure the rapid delivery of superior quality products.
We pride ourselves on a meticulously designed management system that upholds the highest quality standards. Accredited with the ISO9001 quality management system, we adhere to stringent quality control measures. Every machine undergoes thorough inspections at every stage, from material and production checks to pre-delivery evaluations, guaranteeing superior product reliability and excellence.
Our exemplary customer service begins with an expert pre-sales team offering guidance to select the perfect air equipment tailored to diverse needs. We offer extensive customization options, from appearance to configuration, and provide bespoke solutions to meet specific dealer demands through our OEM services. Our dedicated sales and service team is always ready to offer swift and efficient post-sales support, ensuring immediate responses to your needs.
At Sanzhi (Henan) Compressor Co., Ltd, our dedication to delivering superior, reliable, and stable products is unwavering. We focus on building long-term client relationships by promising prompt delivery, top-tier machinery, and competitive pricing, ensuring you receive the best compressed air solution tailored to your needs.
Nestled in the scenic Xinzheng City, Henan Province, China, our facility enjoys a strategic location just 30 kilometers from Xinzheng International Airport, about an hour's drive away. We warmly welcome you to visit our factory and witness our remarkable offerings firsthand!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a renowned manufacturer specializing in screw air compressors, proudly bearing over a decade of industry expertise.
Q2. How do you control quality?
A: 1. Our raw materials undergo rigorous inspections to ensure the highest quality.
2. The installation process is meticulously monitored with stringent oversight.
3. Each machine is tested for a minimum of 5 continuous hours before dispatch, ensuring peak 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.
Provide this information to us, and we will tailor the ideal solution for your needs!
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 provide an impressive range of voltage options: 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, and 440v/60hz/3p. Additionally, we offer customization to perfectly align with your specific needs.
Q6. How long is the delivery time?
A: For our standard voltage units, expect swift delivery within 15 working days once your order is confirmed. For bespoke or non-standard specifications, please reach out to our dedicated sales team for personalized assistance.
Q7. What's the payment term?
A: Our payment terms are designed for flexibility: 30% T/T upfront, 40% T/T pre-shipment, and a final 30% T/T upon B/L copy confirmation. We accept payments in USD or RMB for your convenience.
Q8. How about your warranty?
A: We proudly offer a comprehensive warranty: one year for the entire machine and a remarkable two-year coverage for the screw air compressor, excluding consumable spare parts to ensure your peace of mind.
Q9. What about the maintenance?
A: Initial maintenance is required after the first 500 hours of operation. Thereafter, maintenance is recommended every 2000-3000 hours, depending on the actual working environment to maintain optimal performance.
Q10. Can machines be run in high-temperature environment?
A: Certainly! Our machines are expertly engineered to perform efficiently in high-temperature conditions, operating seamlessly within a temperature range from -20° to 45° (-4ºF to 113ºF).
Q11. Do you offer OEM service?
A: Absolutely, we specialize in OEM & ODM services, supported by our talented design team. We welcome your custom orders and look forward to bringing your unique visions to life.
Q12. How long could your air compressor be used?
A: Our air compressors are meticulously designed for durability, offering an impressive service life that typically exceeds 10 years, ensuring reliable performance over time.
Q13. Will you provide some spare parts for the machines?
A: Certainly, we provide a comprehensive selection of high-quality spare parts to ensure the seamless operation of your machinery, guaranteeing both longevity and optimal performance.
Q14. How about your after-sales service?
A: Our after-sales service is second to none, offering detailed online installation and commissioning guidance. Furthermore, we can deploy skilled engineers for on-site training and precise installation support when necessary.
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