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 an ideally controlled air compression environment, the energy required for single-stage pressure mirrors that of multi-stage compression. However, real-world conditions-like coupling power losses, bearing friction, and the cooling effect of fluid viscosity-create additional operational energy demands. By reducing the compression ratio at each stage, these inefficiencies can be substantially minimized. Consequently, the overall energy consumption for multi-stage compression is less than that of single-stage compression, ensuring a more efficient, cost-saving operation.
Presenting our state-of-the-art two-stage screw air compressor, a marvel of engineering with its sophisticated twin-stage rotary screw mechanism. This innovative design incorporates an active screw in each stage, driving a passive screw through a robust external power transmission system. The initial stage features a low-pressure screw group, followed by a high-pressure screw group in the subsequent stage. Each screw is surrounded by a meticulously crafted sealing air film. During its operation, the gas undergoes a refined three-phase process-suction, pressurization, and exhaust-delivering impressive compression efficiency and superior performance.
First Stage Compression: As our two-stage screw air compressor begins operation, gas is expertly compressed by a low-pressure screw group. Initially, the gas enters the compression chamber via the suction valve, where the swift rotation of the screw rotor compresses it effectively. Following this initial compression, the gas is seamlessly transferred to the second stage, primed for advanced compression.
Second Stage Compression: In the next stage, the gas is further compressed within a more compact screw space, achieving higher temperatures and pressures. The process reaches its climax as the exhaust valve opens, releasing the high-pressure gases from the system, thus culminating the entire compression cycle.
Natural air is first drawn through the air filter into the initial compression stage, where it mixes with a small amount of lubricating oil. This blend is then compressed to an intermediate pressure. Subsequently, the gas advances into a cooling channel, encountering a generous amount of oil mist, which dramatically lowers its temperature. The cooled, compressed gas then moves to the second-stage rotor for its final compression to the ultimate exhaust pressure. Upon reaching this stage, the fully compressed gas exits the system through the exhaust valve, completing the compression cycle with precision and optimal efficiency.
1) High Efficiency of PM Motor:Unleash superior energy savings with our avant-garde permanent magnet motor, designed to enhance your energy efficiency by a remarkable 20-30% over traditional motor systems. This motor excels with its extensive constant torque and weak magnetic range, maintaining top-tier efficiency levels even when operating beyond its rated capacity, ensuring your operations achieve optimal performance consistently.
2) Two-Stage Compression Unique Air End:Discover our state-of-the-art two-stage compression screw system, featuring a uniquely engineered air end that integrates dual compression rotors within a single casing. Each rotor is directly gear-driven to achieve its optimal linear speed, resulting in unparalleled compression efficiency and reliability.
3) Integrated Frequency Converter: Harness the power of China's leading frequency system with our air compressor, which offers a broad speed regulation range alongside exceptional precision. This allows users to easily tailor the frequency to suit real-time gas requirements, achieving notable energy savings and heightened operational efficiency.
4) Reduce Internal Leakage:Our innovative two-stage compression technology minimizes the compression ratio per stage, which significantly reduces internal leakage from high to low-pressure areas. This enhancement dramatically improves volumetric efficiency, boosting the overall performance of the compressor system.
5) Variable Frequency Start and Soft Start:The motor's variable frequency and soft start features significantly mitigate the impact on power grid infrastructures, safeguarding electrical components from potential harm.
6) Reduce Energy Consumption: Our advanced frequency conversion system dominates the industry with its wide operational range of 25% to 100%, outperforming the standard 50% to 100% range. This system yields energy savings over 30% compared to fixed-speed compressors, with an added 5% efficiency gain over traditional variable frequency systems, ideal for dynamic gas demand conditions.
7) No Transmission Loss: The innovative, compact design of the integrated shaft's direct connection between the permanent magnet motor and compressor eliminates transmission components. This design ensures impeccable 100% transmission efficiency, optimizing performance to its fullest potential.
8) Air Cooling Method: Our exceptionally efficient air cooling system delivers superior cooling capabilities, drastically lowering compressed air temperatures. The nearly isothermal compression minimizes pressure loss, enhancing the compression ratio and boosting efficiency significantly.
9)Smart Touch Controller: Our advanced smart controller is engineered to minimize manual interventions, featuring a high-resolution color display that provides intuitive graphical interfaces, maintenance alerts, fault warnings, and safety shutdown notifications, ensuring seamless, uninterrupted operational flow.
10)Special Type Intake Valve:With automatically controlled openings, our intake valve enables effortless engine fuel injection and oil circulation, greatly optimizing system efficiency.
Ultra-low oil circuit loss further enhances overall system efficiency.
The normally open solenoid valve securely closes during emergency stops, preventing oil injection and ensuring maximum system safety.
11)Excellent Air Filter:Our exceptional air filter, featuring a robust three-stage filtration system, ensures unmatched air purification and superior air quality. This system effectively removes 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 with premium soundproof cotton significantly reduces operational vibrations and noise, creating a quieter, more efficient workspace.
13) Motor Maintenance-Free:Our maintenance-free permanent magnet motor, designed without internal bearings, eliminates the need for bearing upkeep and replacement, reducing long-term maintenance costs while enhancing reliability.
14) Noise Reduction:Immerse yourself in unparalleled tranquility with the advanced two-stage compression technology, masterfully crafted by Sanzhi (Henan) Compressor Co., Ltd. This innovative system cleverly minimizes the compression ratio, resulting in a significant reduction in operational noise, especially during unloading phases. Experience a quieter and more efficient working environment, boosting your productivity with the Sanzhi Efficient Robust Two-Stage Permanent Magnet VFD Screw Compressor for Heavy Tasks. Elevate your industrial operations with the superior engineering prowess of Sanzhi's top-tier solutions.
15) Effortless Maintenance and Service:Our trailblazing two-stage compressor unit, designed by Sanzhi (Henan) Compressor Co., Ltd., retains the familiar structure and systems of a single-stage compressor, with the sole modification being the screw air end. This thoughtful design ensures that maintenance and service remain straightforward and accessible. Enjoy hassle-free upkeep and reliable, peak performance with the Sanzhi Efficient Robust Two-Stage Permanent Magnet VFD Screw Compressor for Heavy Tasks. Trust Sanzhi for effortless maintenance and exceptional 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 unparalleled value with Sanzhi (Henan) Compressor Co., Ltd., where factory-direct pricing is just the beginning. By sourcing directly from us, you fortify your market position and gain the decisive competitive edge essential for triumph.
2. Direct Transactions
Experience the pinnacle of cost-efficiency and reliability with our streamlined direct transactions. Our seamless process ensures products journey directly from our factory to your doorstep, maximizing savings and ensuring a steadfast, trustworthy service every step of the way.
3. OEM & ODM Services
Leverage our cutting-edge production and management expertise for tailored OEM and ODM services. We meticulously customize each offering to meet your unique specifications, ensuring that every detail is perfectly aligned with your expectations.
4. Customized Solutions
Excel in handling non-standard and export orders with our adept management of voltage, power, and pressure specifications. Share your unique needs, and we'll craft tailored solutions that fit seamlessly with your exact requirements.
5. Small Order Acceptance
Begin your partnership with a small trial order to experience the superior quality of our products firsthand. Ensure your complete satisfaction before advancing to a more extensive commitment.
6. Rapid Delivery
Enjoy peace of mind with our rapid and efficient delivery services. We prioritize the swift arrival of your top-tier products, ensuring seamless operation without disruption.
7. Comprehensive Authorization
Expand your distribution prowess with our inclusive authorization certifications. Confidently market and sell SANZHI brand products, supported by our rigorous and comprehensive certification process.
Sanzhi (Henan) Compressor Co., Ltd is a renowned and acclaimed manufacturer in the field, specializing in pioneering and state-of-the-art screw air compressors and screw vacuum pumps. With over a decade of unmatched industry knowledge, we take pride in offering a versatile and extensive product range. Our lineup includes normal pressure and low-pressure screw air compressors, innovative permanent magnet frequency conversion screw air compressors, efficient two-stage compression screw air compressors, and specialized screw air compressors tailored for laser cutting. Additionally, we provide both single-tank and double-tank mobile screw air compressors, alongside electric and diesel mobile screw air compressors. Our high-tech screw vacuum pumps are designed to meet the most exacting industrial requirements, ensuring optimum performance and reliability.
Our cutting-edge production facility is equipped with advanced multi-air compressor assembly lines, which guarantee exceptional precision and efficiency. With the support of a dedicated team of more than 50 highly skilled employees, we consistently refine our management systems such as ERP, drastically reducing lead times and ensuring the rapid delivery of top-tier quality products. Our unwavering commitment to innovation keeps us at the forefront of the industry, consistently pushing the boundaries of what is possible.
Our rigorously crafted management systems are committed to maintaining the highest quality standards. With the prestigious ISO9001 quality management system certification, we implement strict quality control protocols. Each machine undergoes thorough inspections at every stage, from initial material checks to production assessments and pre-delivery evaluations, ensuring unparalleled product reliability and excellence. Our steadfast dedication to quality provides you with the assurance and peace of mind you deserve.
Our outstanding customer service begins with a pre-sales team that offers expert assistance in selecting the ideal air equipment tailored to various facilities. We offer extensive customization options, including appearance and configuration, creating bespoke products to meet specific dealer requirements through our OEM services. Our professional sales and service team is always on hand to provide prompt and efficient post-sales support, ensuring your needs are met with swiftness and care. Experience unrivaled customer service and attention with Sanzhi.
At Sanzhi (Henan) Compressor Co., Ltd, we are steadfast in our commitment to delivering superior, reliable, and stable products. Our dedication to forging long-lasting relationships with our clients is unwavering. We promise efficient delivery, top-quality machinery, and competitive pricing. We ensure you receive the perfect compressed air solution tailored to your requirements, delivering exceptional value and performance at every turn.
Nestled in the picturesque Xinzheng City, Henan Province, China, our factory enjoys a prime location just 30 kilometers from Xinzheng International Airport, merely an hour's drive away. We warmly invite you to visit our facility and experience our exceptional offerings firsthand! Come and discover the Sanzhi difference in person, where innovation meets excellence.
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a distinguished and leading manufacturer specializing in screw air compressors, with over a decade of industry expertise that distinctly sets us apart in the field.
Q2. How do you control quality?
A: 1. Our raw materials undergo stringent inspections to ensure only the highest quality materials are used before production commences.
2. The meticulous installation process is closely monitored at every stage to maintain strict standards.
3. Each machine is rigorously tested for a minimum of 5 continuous hours before dispatch to ensure peak performance and reliability.
Q3. What information must I provide to get the suitable machine?
1. Specify your required air delivery capacity (Unit: CFM or m³/Min) for optimal performance.
2. Indicate the desired working pressure (Unit: PSI, Bar or Mpa) to suit your operational needs.
3. Provide the voltage and frequency specifications of your country of residence (V/Hz) for compatibility.
4. List any additional accessories required, such as an air tank, filters, or air dryers, to enhance functionality.
Share this information with us, and we will tailor a precise solution just for you! Our expertise guarantees that we meet your specific and unique needs with excellence.
Q4. What is the general unit conversion?
1Bar = 0.1Mpa = 14.5PSI
1m³/min = 35.32 cfm. This precise conversion underscores the remarkable capacity of our compressors, ensuring they adeptly handle the demands of diverse industrial applications with unparalleled performance and efficiency.
1KW = 1.34 HP. This power conversion highlights the robust capability of our compressors to deliver formidable power, assuring consistent and dependable operation under even the most challenging conditions.
Q5. What is the available voltage air compressor?
A: Sanzhi (Henan) Compressor Co., Ltd. presents a versatile range of voltage options, expertly catering to global requirements. Select from 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, and 440v/60hz/3p. We excel in providing meticulously tailored solutions to meet your unique electrical specifications, ensuring seamless compatibility and superior performance.
Q6. How long is the delivery time?
A: For standard voltage units, our streamlined processes ensure dispatch within a mere 15 working days following order confirmation. For non-standard voltage requirements, consult our dedicated sales team to receive a precise, customized delivery schedule tailored to your specific needs.
Q7. What's the payment term?
A: Our payment terms are designed for utmost convenience: 30% T/T in advance, 40% T/T before shipment, and the remaining 30% T/T upon receiving the B/L copy. We accept payments in both USD and RMB, providing flexibility and ease in transactions.
Q8. How about your warranty?
A: Sanzhi offers a robust warranty, providing reassurance: one year for the entire machine and two years for the screw air compressor. Consumable spare parts are the exception, underscoring our dedication to quality and durability.
Q9. What about the maintenance?
A: Initial maintenance is vital and should be conducted after 500 operating hours. Subsequently, maintenance intervals are recommended between 2000-3000 hours, adjusted 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 outstanding performance, even in extreme temperatures, maintaining efficient operation within a broad range of -20° to 45° (-4ºF to 113ºF), ensuring reliability and endurance in demanding conditions.
Q11. Do you offer OEM service?
A: Yes, we specialize in providing both OEM and ODM services. Our expert design team excels at bringing your custom orders to fruition, crafting bespoke 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 engineered for exceptional longevity, boasting a remarkable lifespan that typically exceeds 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 for the long term.
Q14. How about your after-sales service?
A: We provide exceptional after-sales support, including detailed online installation and commissioning guidance. If needed, 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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