Introducing the revolutionary Low-Pressure Compressor, proudly brought to you by Sanzhi (Henan) Compressor Co., Ltd.! This exceptional Two-Stage Compression Permanent Magnet Variable Frequency Drive Screw Air Compressor is a marvel of modern engineering, setting unparalleled benchmarks in industrial excellence. Offering an impressive array of power options, including 15KW, 22KW, 30KW, 37KW, 45KW, 55KW, 75KW, 90KW, 110KW, 132KW, 160KW, 185KW, 200KW, and up to 250KW, this versatile titan guarantees superior efficiency and steadfast reliability across all uses. Elevate your operations with this cutting-edge marvel, meticulously crafted to meet and exceed the diverse and demanding requirements of contemporary industries.
Internal Structure Frontside
Internal Structure Backside
Working Principle
In a perfectly controlled air compression environment, the energy requirement for single-stage pressure is equivalent to the energy used in multi-stage compression. However, real-world conditions-such as coupling power losses, bearing friction, and the cooling effect of fluid viscosity-result in increased operational energy demands. By decreasing the compression ratio at each stage, these inefficiencies can be significantly reduced. As a result, the cumulative power consumption for multi-stage compression is less than that of single-stage compression, ensuring a more efficient and cost-effective operation.
Introducing our cutting-edge two-stage screw air compressor, which boasts an exquisitely advanced twin-stage rotary screw mechanism. This groundbreaking design features an active screw in each stage that drives a passive screw through a sturdy external power transmission arrangement. The initial stage is equipped with a low-pressure screw group, while the subsequent stage hosts a high-pressure screw group. Each screw is meticulously enveloped by a sealing air film. Throughout its operation, the gas is processed in a three-phase cycle-suction, pressurization, and exhaust-delivering exceptional compression efficiency and performance.
First Stage Compression: At the outset of our two-stage screw air compressor's operation, the gas is adeptly compressed using a low-pressure screw group. Initially, the gas is drawn into the compression chamber through the suction valve, where the rapid rotation of the screw rotor compresses it. After this initial compression, the gas is flawlessly transferred to the second stage, setting the stage for further compression.
Second Stage Compression: In the subsequent stage, the gas is further compressed within a more compact screw space, reaching higher temperatures and pressures. The process reaches its zenith as the exhaust valve opens, allowing the high-pressure gases to be discharged from the system, thus completing the entire compression cycle.
Natural air is initially drawn through the air filter into the first compression stage, where it merges with a small amount of lubricating oil. This mixture is then compressed to an intermediate pressure. Following this, the gas progresses into a cooling channel, interacting with a substantial amount of oil mist, which significantly reduces its temperature. The cooled, compressed gas then proceeds to the second-stage rotor for its ultimate compression to the final exhaust pressure. Upon reaching this stage, the fully compressed gas exits the system via the exhaust valve, culminating the compression cycle with precision and efficiency.
1) High efficiency of PM motor:Experience the ultimate in energy efficiency with our groundbreaking permanent magnet motor. Its expansive constant torque and weak magnetic range deliver an impressive 20-30% efficiency increase compared to traditional motors. Even at frequencies beyond its rated capacity, the motor maintains superior efficiency, ensuring peak performance consistently.
2) Two-stage compression unique air end:Our cutting-edge two-stage compression screw system features an innovatively designed air end, seamlessly integrating the dual compression rotors within a single casing. Driven directly by gears, each rotor achieves its optimal linear speed, maximizing compression efficiency and reliability.
3) Integrated frequency converter: Equipped with the leading frequency system in China, our air compressor boasts an expansive speed regulation range and exceptional precision. Users can easily adjust the frequency to match actual gas needs, realizing significant energy savings and enhanced operational efficiency.
4) Reduce internal leakage:Our two-stage compression technology lowers the compression ratio for each stage, effectively reducing internal leakage from high to low-pressure ends. This significantly boosts volumetric efficiency and overall compressor performance.
5) Variable frequency start and the soft startThe motor features variable frequency and soft start capabilities, which dramatically lessen the impact on power grid systems, preserving electrical components from potential damage.
6) Reduce energy consumption: Our advanced frequency conversion system operates efficiently from 25% to 100%, far surpassing the typical 50% to 100% range. Compared to fixed-speed compressors, it offers energy savings exceeding 30%, with an additional 5% gain over standard variable frequency systems, perfect for fluctuating gas demands.
7) No transmission loss: The compact design of the integrated shaft direct connection structure between the permanent magnet motor and compressor eliminates transmission parts. This results in a flawless 100% transmission efficiency, ensuring maximum performance.
8) Air cooling method: Our highly efficient air cooling system provides outstanding cooling capabilities, substantially lowering compressed air temperatures. This nearly isothermal compression reduces pressure loss, optimizing the compression ratio and enhancing efficiency.
9)Smart Touch Controller: Our sophisticated built-in intelligence minimizes the need for manual intervention. With a high-resolution color electronic display, it provides intuitive graphical interfaces, maintenance alerts, fault warnings, and safety shutdown notifications, ensuring smooth, uninterrupted operation.
10)Special Type Intake Valve:The automatically controlled opening allows for seamless engine fuel injection and oil circulation, improving system efficiency.
With ultra-low oil circuit loss, overall system efficiency is significantly enhanced.
The normally open solenoid valve securely closes during emergency stops, preventing oil injection and ensuring maximum system safety.
11)Excellent Air Filter:Our premium air filter offers unparalleled air purification with a robust three-stage filtration system, guaranteeing superior air quality. It effectively eliminates steam and dust, exceeding the highest emission standards for a cleaner environment.
12)High-Quality Soundproof Cotton:The combination of a compact noise reduction housing and premium soundproof cotton significantly minimizes operational vibrations and noise, creating a quieter and more efficient workspace environment.
13) Motor maintenance-free:Our maintenance-free permanent magnet motor, devoid of internal bearings, eliminates the necessity for bearing upkeep and replacement. This reduces long-term maintenance costs while boosting reliability.
14) Noise reduction:Immerse yourself in unmatched serenity with the cutting-edge two-stage compression technology, meticulously engineered by Sanzhi (Henan) Compressor Co., Ltd. This revolutionary system strategically reduces the compression ratio, leading to a substantial decrease in operational noise, especially noticeable during unloading phases. Delight in a quieter, more productive working environment and supercharge your productivity levels with the Sanzhi Efficient Robust Two-Stage Permanent Magnet VFD Screw Compressor for Heavy Tasks. Step up your industrial operations with Sanzhi's top-tier engineering expertise.
15) Seamless Maintenance and Service:Our pioneering two-stage compressor unit, envisioned by Sanzhi (Henan) Compressor Co., Ltd., maintains the recognizable structure and systems of a single-stage compressor, with the sole difference being the screw air end. This design ensures that maintenance and service continue to be uncomplicated and accessible. Enjoy stress-free upkeep and reliable, peak performance with the Sanzhi Efficient Robust Two-Stage Permanent Magnet VFD Screw Compressor for Heavy Tasks. Place your trust in Sanzhi for effortless maintenance and outstanding outcomes.
| 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
Discover unrivaled value with Sanzhi (Henan) Compressor Co., Ltd. When you source directly from us, you unlock factory-direct pricing that fortifies your market position, giving you the competitive edge you need.
2. Direct Transactions
Benefit from cost-efficiency and reliability through our direct transactions. Our seamless process ensures products head straight from our factory to you, maximizing savings and providing consistent, trustworthy service.
3. OEM & ODM Services
Harness our state-of-the-art production and management capabilities for bespoke OEM and ODM services. We meticulously customize our offerings to your precise needs, ensuring every requirement is impeccably satisfied.
4. Customized Solutions
We excel in managing non-standard and export orders, adeptly meeting specific voltage, power, and pressure prerequisites. Share your bespoke needs, and we'll craft solutions that align flawlessly with your expectations.
5. Small Order Acceptance
Initiate your collaboration with a small trial order and experience our products' superior quality firsthand. Ensure your satisfaction before expanding your commitment.
6. Rapid Delivery
Revel in the confidence afforded by our swift and efficient delivery services. We prioritize the prompt arrival of your high-quality products, ensuring your operations continue seamlessly without interruption.
7. Comprehensive Authorization
Enhance your distribution capabilities with our extensive authorization certifications. Market and sell SANZHI brand products confidently, supported by our comprehensive certification process.
Sanzhi (Henan) Compressor Co., Ltd is a distinguished and reputable manufacturer specializing in cutting-edge screw air compressors and screw vacuum pumps. With over a decade of unparalleled industry expertise, we proudly present a versatile and comprehensive product lineup, including normal pressure and low-pressure screw air compressors, permanent magnet frequency conversion screw air compressors, two-stage compression screw air compressors, screw air compressors specifically designed for laser cutting, and both single-tank and double-tank mobile screw air compressors. Additionally, we offer electric and diesel mobile screw air compressors as well as state-of-the-art screw vacuum pumps, all designed to meet the most demanding industrial needs.
Our state-of-the-art production facility boasts advanced multi-air compressor assembly lines, ensuring exceptional efficiency and precision. Supported by a dedicated team of over 50 highly skilled employees, we continuously enhance our management systems, like ERP, to significantly reduce lead times and guarantee the swift delivery of premier quality products. Our relentless pursuit of innovation ensures we stay at the forefront of the industry.
Our meticulously designed management systems are dedicated to upholding the highest quality standards. Proudly certified under the ISO9001 quality management system, we adhere to rigorous quality control protocols. Each machine undergoes comprehensive inspections at various stages, from material and production checks to pre-delivery evaluations, ensuring unmatched product reliability and excellence. Our dedication to quality is unwavering, providing you with peace of mind.
Our exemplary customer service begins with a pre-sales team that offers expert guidance for selecting the ideal air equipment tailored to diverse facilities. We provide extensive customization options, including appearance and configuration, and create bespoke products to meet specific dealer demands through our OEM services. Our professional sales and service team is always on standby to deliver prompt and efficient post-sales support, ensuring your needs are swiftly addressed. Experience unparalleled customer attention with Sanzhi.
At Sanzhi (Henan) Compressor Co., Ltd, we are unwavering in our commitment to delivering superior, reliable, and stable products. Dedicated to forging long-term relationships with our clients, we promise efficient delivery, high-quality machinery, and competitive pricing. We ensure you receive the optimal compressed air solution for your requirements, delivering exceptional value and performance.
Located in the picturesque Xinzheng City, Henan Province, China, our factory is conveniently situated just 30 kilometers from Xinzheng International Airport, approximately an hour's drive away. We warmly invite you to visit our facility and experience our exceptional offerings firsthand! 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, proudly boasting over a decade of industry expertise. Our depth of experience sets us apart in the field.
Q2. How do you control quality?
A: 1. Our raw materials undergo rigorous inspection to ensure the highest quality before production begins.
2. The meticulous installation process is stringently monitored at every step.
3. Every machine is subjected to a minimum of 5 continuous hours of testing before dispatch to ensure optimal 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 tailor a perfect solution for you! Our expertise ensures we meet your precise needs.
Q4. What is the general unit conversion?
1Bar = 0.1Mpa = 14.5PSI
1m³/min = 35.32 cfm. This precise conversion showcases the impressive capacity of our compressors, ensuring that they meet the demands of diverse industrial applications with unmatched performance.
1KW = 1.34 HP. This power conversion underlines the robust capability of our compressors to deliver substantial power, ensuring consistent and reliable operation under demanding conditions.
Q5. What is the available voltage air compressor?
A: Sanzhi (Henan) Compressor Co., Ltd. offers an extensive array of voltage options, perfectly catering to global requirements. Choose from 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, and 440v/60hz/3p. We excel in providing meticulously customized solutions tailored to your unique electrical specifications, ensuring perfect compatibility and enhanced performance.
Q6. How long is the delivery time?
A: For standard voltage units, our streamlined processes guarantee dispatch within just 15 working days post order confirmation. For non-standard voltage requirements, consult our dedicated sales team to receive a precise delivery schedule, customized to your specific needs.
Q7. What's the payment term?
A: Our payment terms are crafted for maximum convenience: 30% T/T in advance, 40% T/T before shipment, and the final 30% T/T upon receiving the B/L copy. We accommodate payments in both USD and RMB, ensuring flexibility and ease in transactions.
Q8. How about your warranty?
A: Sanzhi proudly offers a robust warranty, ensuring peace of mind: one year for the entire machine and two years for the screw air compressor. Consumable spare parts are the only exception, highlighting our commitment to quality and durability.
Q9. What about the maintenance?
A: Initial maintenance is crucial and should be conducted after 500 operating hours. Thereafter, maintenance intervals are recommended between 2000-3000 hours, tailored to suit your specific working environment, ensuring optimal performance and longevity.
Q10. Can machines be run in high-temperature environment?
A: Absolutely! Our machines are engineered for exceptional performance, even under extreme temperatures, maintaining efficient operation within a broad range of -20° to 45° (-4ºF to 113ºF), ensuring reliability and endurance in challenging conditions.
Q11. Do you offer OEM service?
A: Yes, we specialize in offering both OEM and ODM services. Our expert design team is adept at bringing your custom orders to life, crafting tailor-made solutions that align seamlessly with your specifications, enhancing brand identity and product differentiation.
Q12. How long could your air compressor be used?
A: Our air compressors are meticulously designed for exceptional longevity, boasting a remarkable lifespan that typically surpasses 10 years of reliable and efficient service, ensuring sustained productivity and value.
Q13. Will you provide some spare parts for the machines?
A: Absolutely, we offer a comprehensive range of premium spare parts, designed to ensure your machines continue to operate seamlessly and maintain peak performance, maximizing uptime and operational efficiency over the long term.
Q14. How about your after-sales service?
A: We provide stellar after-sales support, offering detailed online installation and commissioning guidance. If required, we can arrange for expert engineers to deliver hands-on training and meticulous installation assistance, ensuring seamless integration and optimal operation.
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