Introducing the groundbreaking Low-Pressure Compressor, a product of unmatched innovation by Sanzhi (Henan) Compressor Co., Ltd. This exceptional Two-Stage Compression Permanent Magnet Variable Frequency Drive Screw Air Compressor stands as a testament to modern engineering prowess, setting new standards in industrial excellence. Offering a remarkable selection of power options, from 15KW to an impressive 250KW, this versatile giant guarantees exceptional efficiency and unwavering reliability for all applications. Elevate your operations with this state-of-the-art marvel, meticulously engineered to meet and surpass the varied and demanding needs of today's industries. Experience the zenith of air compression technology with this high-capacity powerhouse, expertly designed for heavy-duty applications. Its advanced two-stage air cooling system ensures peak performance and enduring longevity, making it the perfect choice for businesses aiming to streamline operations and boost productivity. Embrace the future of industrial compressors with Sanzhi's trailblazing innovation, where unparalleled quality meets extraordinary performance to redefine your expectations.
Internal Structure Frontside
Internal Structure Backside
Working Principle
Within a meticulously controlled air compression environment, our advanced technology equates the energy demand for single-stage compression to that of multi-stage compression. However, real-world variables-such as coupling power losses, bearing friction, and the cooling effects due to fluid viscosity-often lead to increased energy consumption. By ingeniously reducing the compression ratio at each stage, these inefficiencies are significantly curtailed. As a result, the overall power consumption for multi-stage compression is reduced compared to single-stage compression, ensuring an operation that is both cost-effective and highly efficient.
Introducing the groundbreaking two-stage screw air compressor by Sanzhi, a paragon of modern engineering, featuring an elegantly sophisticated twin-stage rotary screw mechanism. This inventive setup incorporates an active screw at both stages, each driving a passive screw with precision through a robust external power transmission system. The initial stage is equipped with a low-pressure screw group, followed by a high-pressure screw group in the subsequent stage. Each screw is meticulously enveloped in a sealing air film. During operation, the gas gracefully traverses a three-phase cycle-suction, pressurization, and exhaust-delivering exceptional compression efficiency and superior performance.
First Stage Compression: At the commencement of our two-stage screw air compressor's operation, the gas is expertly compressed via a low-pressure screw group. Initially, the gas is drawn into the compression chamber through the suction valve, where it is swiftly compressed by the rotating screw rotor. Following this initial compression, the gas flows effortlessly to the second stage, setting the stage for further compression refinement.
Second Stage Compression: Progressing into the subsequent stage, the gas undergoes additional compression within a more compact screw environment, experiencing an increase in temperature and pressure. This process reaches its pinnacle as the exhaust valve opens, enabling the high-pressure gases to seamlessly discharge from the system, thereby completing the entire compression cycle with unmatched precision.
Natural air is initially drawn through the air filter into the first compression stage, where it is infused with a trace amount of lubricating oil. This mixture undergoes compression to an intermediate pressure level. Post this stage, the gas advances into a cooling channel where it interacts with a substantial amount of oil mist, effectively reducing its temperature. The cooled, compressed gas then moves onto the second-stage rotor for its final compression to reach the ultimate exhaust pressure. At this juncture, the fully compressed gas exits the system through the exhaust valve, concluding the compression cycle with outstanding precision and efficiency.
1) High efficiency of PM motor:Experience the pinnacle of energy efficiency with our cutting-edge permanent magnet motor. This marvel of engineering provides a remarkable 20-30% boost in efficiency over traditional motors, courtesy of its extensive constant torque and expansive weak magnetic range. Even when operating at frequencies beyond its rated capacity, it maintains superb efficiency, guaranteeing peak performance at all times.
2) Two-stage compression unique air end:Our advanced two-stage compression screw system is meticulously designed with a uniquely engineered air end, incorporating dual compression rotors within a single casing. These rotors, directly powered by gears, function at their optimal linear speeds, thus amplifying compression efficiency and delivering unmatched reliability.
3) Integrated frequency converter: Equipped with China's premier frequency system, our compressor excels with an extensive speed regulation range and remarkable precision. Users can easily adjust the frequency to match actual gas needs, realizing significant energy savings and exceptional operational efficiency.
4) Reduce internal leakage:Our revolutionary two-stage compression technology effectively reduces the compression ratio for each stage, minimizing internal leakage from high to low-pressure ends. This advancement results in enhanced volumetric efficiency and superior overall compressor performance.
5) Variable frequency start and the soft startWith variable frequency and soft start features, our motor significantly reduces stress on power grid systems, protecting electrical components from potential damage and extending their lifespan.
6) Reduce energy consumption: Our state-of-the-art frequency conversion system performs efficiently across a broad range from 25% to 100%, vastly surpassing the typical 50% to 100% range. Compared to fixed-speed compressors, it achieves over 30% energy savings, with an additional 5% efficiency boost beyond standard variable frequency systems, making it perfect for handling fluctuating gas demands.
7) No transmission loss: The sleek design of the direct connection structure between the permanent magnet motor and the compressor eradicates transmission components. This ensures flawless 100% transmission efficiency, delivering peak performance without compromise.
8) Air cooling method: Our highly efficient air cooling system offers exceptional cooling capacity, significantly reducing compressed air temperatures. This nearly isothermal compression minimizes pressure loss, optimizes the compression ratio, and enhances overall efficiency.
9)Smart Touch Controller: Our sophisticated smart controller is equipped with built-in intelligence, minimizing the need for manual intervention. Featuring a high-resolution color electronic display, it provides intuitive graphical interfaces, maintenance alerts, fault warnings, and safety shutdown notifications, ensuring seamless and uninterrupted operation.
10)Special Type Intake Valve:The automatic opening ensures seamless engine fuel injection and oil circulation, boosting overall system efficiency.
With an ultra-low oil circuit loss, our system efficiency is significantly enhanced.
The normally open solenoid valve securely seals during emergency stops, preventing oil injection and ensuring maximum system safety.
11)Excellent Air Filter:Our top-tier air filter provides unparalleled air purification with a robust three-stage filtration system, ensuring superior air quality. It effectively eliminates steam and dust, exceeding even the highest emission standards for environmentally friendly operation.
12)High-Quality Soundproof Cotton:With a compact noise reduction housing and premium soundproof cotton, our design significantly reduces operational vibrations and noise, creating a quieter and more efficient work environment.
13) Motor maintenance-free:Our pioneering maintenance-free permanent magnet motor is a marvel of modern engineering, designed without internal bearings. This ingenious feature eradicates the need for any bearing maintenance or replacement, drastically slashing long-term upkeep costs while soaring reliability to new heights.
14) Noise reduction:Immerse yourself in an oasis of tranquility with the revolutionary two-stage compression technology, expertly engineered by Sanzhi (Henan) Compressor Co., Ltd. This state-of-the-art system cleverly optimizes the compression ratio, delivering a striking reduction in operational noise, especially during unloading phases. Delight in a quieter, more efficient work environment and amplify your productivity with the Sanzhi Efficient Robust Two-Stage Permanent Magnet VFD Screw Compressor-perfectly tailored for heavy-duty tasks. Transform your industrial operations with Sanzhi's unparalleled engineering prowess.
15) Effortless Maintenance and Unmatched Service:Our groundbreaking two-stage compressor unit, envisioned by Sanzhi (Henan) Compressor Co., Ltd., preserves the familiar architecture and systems of a single-stage compressor, with the sole enhancement being the screw air end. This innovative design ensures that maintenance and service are incredibly straightforward and user-friendly. Relish in hassle-free upkeep and consistent, superior performance with the Sanzhi Efficient Robust Two-Stage Permanent Magnet VFD Screw Compressor for Heavy Duty Tasks. Rely on Sanzhi for seamless maintenance and extraordinary results.
| 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
Unlock unbeatable value with Sanzhi (Henan) Compressor Co., Ltd. By choosing us, you gain exclusive access to factory-direct pricing, empowering you with a distinct competitive edge in your market. Elevate your position with our superior pricing strategy.
2. Direct Transactions
Experience cost-efficiency and unwavering reliability with our direct transaction model. Our seamless logistics ensure products are delivered directly from our factory to you, maximizing your savings while guaranteeing a steady, dependable supply chain.
3. OEM & ODM Services
Leverage our cutting-edge production and management prowess for premium OEM and ODM services. We tailor each offering to meet your unique specifications, ensuring that every custom requirement is flawlessly realized to perfection.
4. Customized Solutions
Master the art of handling non-standard and export orders with our tailored solutions. We expertly meet diverse voltage, power, and pressure specifications. Convey your unique demands, and we'll engineer solutions that seamlessly match your precise expectations.
5. Small Order Acceptance
Begin your journey with us through a small trial order to witness the exceptional quality of our products firsthand. Ensure your complete satisfaction before committing to larger orders, giving you peace of mind.
6. Rapid Delivery
Experience peace of mind with our swift and reliable delivery services. We prioritize the expedited arrival of our high-quality products, ensuring your operations remain uninterrupted and efficient.
7. Comprehensive Authorization
Amplify your distribution network with our robust authorization certifications. Market and distribute SANZHI brand products with unwavering confidence, bolstered by our extensive and thorough certification process.
Sanzhi (Henan) Compressor Co., Ltd stands as a beacon of excellence, leading the forefront in crafting cutting-edge screw air compressors and screw vacuum pumps. With over ten years of unrivaled industry expertise, our product range is nothing short of extraordinary. From standard and low-pressure screw air compressors to highly efficient permanent magnet frequency conversion models and sophisticated two-stage compression screw air compressors, we offer solutions for every need. Our specialized laser cutting screw air compressors and versatile single-tank and double-tank mobile screw air compressors demonstrate our adaptability. Designed for peak performance, our electric and diesel mobile screw air compressors are second to none. Our state-of-the-art screw vacuum pumps are crafted to meet the most stringent industrial demands with precision and reliability.
Our state-of-the-art production facility is outfitted with advanced multi-air compressor assembly lines. This ensures that every product is manufactured with exceptional efficiency and precision. With a team of more than 50 highly skilled experts, we are dedicated to refining our management systems, including ERP, to significantly reduce lead times, ensuring rapid delivery of superior products. Our ceaseless pursuit of innovation places us at the industry's cutting edge, setting new standards for excellence.
Our meticulously developed management systems are designed to maintain the highest quality standards. Backed by the prestigious ISO9001 quality management system certification, we implement stringent quality control protocols. Each machine is subjected to thorough inspections at multiple stages, from material selection and production checks to pre-delivery assessments, guaranteeing unmatched reliability and excellence. Our steadfast commitment to quality provides you with complete confidence, ensuring exceptional performance every time.
Experience exceptional customer service starting with our pre-sales team, offering expert guidance to select the perfect air equipment tailored to diverse facilities. We provide extensive customization options, including design and configuration modifications, and bespoke solutions through our OEM services to meet specific dealer needs. Our professional sales and support team is always prepared to offer swift and effective post-sales assistance, ensuring your needs are addressed promptly and accurately. Enjoy unmatched customer care with Sanzhi.
At Sanzhi (Henan) Compressor Co., Ltd, our mission is to deliver products that exemplify excellence, reliability, and durability. Committed to fostering enduring partnerships with our clients, we guarantee timely delivery, world-class machinery, and competitive pricing. Our aim is to offer the ultimate compressed air solution, perfectly tailored to your needs, providing unparalleled value, performance, and satisfaction.
Located in the picturesque Xinzheng City, Henan Province, China, our factory is strategically positioned just 30 kilometers from Xinzheng International Airport, offering easy access within approximately an hour's drive. We warmly welcome you to visit our facility and experience our extraordinary offerings firsthand. Come and discover the Sanzhi difference in person.
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a distinguished manufacturer specializing in screw air compressors, with over a decade of profound industry experience. Our vast expertise distinctly positions us as leaders in the market.
Q2. How do you control quality?
A: 1. We perform meticulous inspections of our raw materials to ensure they meet our high-quality standards before production begins.
2. Our installation process is carefully monitored at each step to guarantee precision.
3. Each machine undergoes a minimum of 5 continuous hours of testing before dispatch to ensure peak performance and reliability.
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 meticulously craft a perfectly tailored solution just for you! Our expertise ensures we meet your precise needs with unparalleled precision and excellence.
Q4. What is the general unit conversion?
1Bar = 0.1Mpa = 14.5PSI
1m³/min = 35.32 cfm. This precise conversion not only highlights the impressive capacity of our compressors but also ensures they efficiently cater to the diverse demands of various industrial applications, delivering exceptional performance and energy efficiency.
1KW = 1.34 HP. This power conversion emphasizes the remarkable strength of our compressors, enabling them to provide substantial power consistently, guaranteeing reliable operation even under the most challenging conditions.
Q5. What is the available voltage air compressor?
A: At Sanzhi (Henan) Compressor Co., Ltd., we offer a diverse range of voltage options to expertly meet global requirements. Options include 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, and 440v/60hz/3p. Our commitment to excellence ensures meticulously customized solutions tailored to your unique electrical needs for seamless compatibility and superior performance.
Q6. How long is the delivery time?
A: For standard voltage units, our efficient processes ensure dispatch within an impressive 15 working days following order confirmation. For non-standard voltage needs, consult our dedicated sales team to receive a customized delivery schedule tailored to your specific requirements.
Q7. What's the payment term?
A: Our payment terms are designed for your utmost convenience: 30% T/T in advance, 40% T/T before shipment, and the remaining 30% T/T upon receipt of the B/L copy. We offer flexibility with payments in USD and RMB, ensuring smooth and seamless transactions for our valued clients.
Q8. How about your warranty?
A: At Sanzhi, we proudly provide a robust warranty for peace of mind: one year for the entire machine and two years for the screw air compressor. Consumable spare parts are the exception, reflecting our dedication to quality and durability.
Q9. What about the maintenance?
A: Initial maintenance is essential and should occur after 500 operating hours. Subsequent maintenance intervals should be between 2000-3000 hours, tailored to suit your specific working environment, ensuring optimal performance and extending the compressor's longevity.
Q10. Can machines be run in high-temperature environment?
A: Absolutely! Our compressors are engineered to deliver exceptional performance, even under extreme temperatures. They maintain efficient operation within a broad range of -20° to 45° (-4ºF to 113ºF), offering reliability and endurance in the most challenging environments.
Q11. Do you offer OEM service?
A: Indeed, we excel in providing both OEM and ODM services. Our expert design team is skilled in bringing your custom orders to fruition, creating tailor-made solutions that align perfectly with your specifications, enhancing both brand identity and product differentiation.
Q12. How long could your air compressor be used?
A: Our air compressors are meticulously engineered for outstanding durability, boasting a remarkable lifespan that generally exceeds 10 years of reliable, efficient service, ensuring sustained productivity and exceptional value over time.
Q13. Will you provide some spare parts for the machines?
A: Certainly, we offer a comprehensive selection of premium spare parts, crafted to ensure your machines continue to operate seamlessly and maintain peak performance, thereby maximizing uptime and operational efficiency in the long term.
Q14. How about your after-sales service?
A: We deliver exceptional after-sales support, offering detailed online installation and commissioning guidance. Should it be necessary, we can arrange expert engineers to provide hands-on training and meticulous installation assistance, ensuring seamless integration and optimal operation.
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