Introducing the groundbreaking Low-Pressure Compressor by Sanzhi (Henan) Compressor Co., Ltd.! This innovative Two-Stage Compression Permanent Magnet Variable Frequency Drive Screw Air Compressor has been expertly designed to revolutionize industrial excellence. It's available in an extensive range 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, ensuring your operations reach new heights. Experience the pinnacle of technological advancement with this meticulously crafted solution, tailored to meet the diverse and rigorous demands of today's modern industries.
Internal Structure Frontside
Internal Structure Backside
Working Principle
In a perfect air compression scenario, the power needed for single-stage pressure transmission would match the total energy requirements of multi-stage compression. However, real-world influences such as coupling power losses, bearing friction, and the cooling influence of fluid viscosity lead to elevated operational energy demands. By reducing the compression ratio at each stage, these inefficiencies are minimized. Thus, the overall energy used in multi-stage compression is less than that required for single-stage compression.
Our state-of-the-art two-stage screw air compressor boasts a sophisticated twin-stage rotary screw mechanism. This innovative system integrates an active screw in each stage that drives a passive screw through a strong external power transmission system. The first stage features a low-pressure screw group, while the second stage utilizes a high-pressure screw group. Each screw is precisely enveloped by a sealing air film, ensuring the utmost in compression efficiency. During operation, the gas undergoes a tri-phase process-suction, pressurization, and exhaust-delivering unparalleled efficiency.
First Stage Compression: In the initial stage of our two-stage screw air compressor, the gas is skillfully compressed using a low-pressure screw group. Initially, the gas is drawn into the compression chamber via the suction valve, where the rapid rotation of the screw rotor compresses it before seamlessly transferring it to the second stage.
Second Stage Compression: In the second stage screw group, the gas undergoes further compression within a more confined screw space, attaining higher temperatures and pressures. This process culminates with the opening of the exhaust valve, which releases the high-pressure gases from the system, thereby completing the compression cycle.
Natural air is first drawn through the air filter into the initial compression stage, where it combines with a small amount of lubricating oil. This blend is compressed to an intermediate pressure. Next, the gas enters a cooling channel, where it encounters a generous amount of oil mist that significantly lowers its temperature. The cooled, compressed gas then proceeds to the second-stage rotor for its final compression, reaching the ultimate exhaust pressure. Once fully compressed, the gas exits the system through the exhaust valve, thus completing the compression cycle.
1) High efficiency of PM motor:Experience the pinnacle of efficiency with our state-of-the-art permanent magnet motor. Boasting an expansive constant torque range and an extensive weak magnetic range, it achieves an impressive efficiency boost of 20-30% over traditional motors. Remarkably, this motor maintains its superior efficiency even when deviating from the rated frequency, ensuring peak performance at all times.
2) Two-stage compression unique air end:Introducing our groundbreaking two-stage compression screw machine, featuring a uniquely designed air end. Ingeniously combining the first and second-stage compression rotors within a single casing, and driven directly by precision gears, this design allows each rotor to operate at optimal linear speed, dramatically maximizing compression efficiency.
3) Integrated frequency converter: Our compressor comes equipped with China's foremost frequency conversion system, providing an extensive range of speed modulation and exceptional precision. Users can effortlessly adjust the frequency to align with actual gas demand, resulting in extraordinary energy savings and remarkable operational efficiency.
4) Reduce internal leakage:Utilizing advanced two-stage compression technology, we effectively reduce the compression ratio for each stage, thereby minimizing internal leakage from the high-pressure end to the low-pressure end. This significantly enhances volumetric efficiency, delivering superior performance.
5) Variable frequency start and the soft startof our motor are seamlessly achieved, greatly diminishing the impact on power grid equipment and protecting electrical components from potential damage.
6) Reduce energy consumption: Our cutting-edge frequency conversion technology operates efficiently from a range of 25% to 100%, impressively surpassing the typical 50% to 100% range. Compared to fixed-speed air compressors, energy savings can exceed a remarkable 30%. Even when compared to standard variable frequency compressors, it offers approximately 5% greater energy efficiency, with substantial savings for systems experiencing fluctuating gas demands.
7) No transmission loss: With an innovative embedded integrated shaft direct connection structure between the permanent magnet motor and compressor, this model is remarkably compact. Free from couplings and other transmission parts, it achieves an unprecedented transmission efficiency of 100%.
8) Air cooling method: Our highly efficient air cooling method offers exceptional cooling performance, significantly reducing the temperature of compressed air. This near-isothermal compression minimizes pressure loss between stages, reduces the compression ratio, and greatly enhances overall efficiency.
9)Smart Touch Controller:Our cutting-edge built-in intelligence demands minimal manual intervention. Featuring a high-precision color electronic screen, it offers clear graphical displays, maintenance notifications, fault alarms, and safety shutdown alerts, ensuring seamless operation and user-friendly interaction.
10)Special Type Intake Valve:Automatically controlled openings ensure smooth engine fuel injection and efficient lubricating oil circulation.
The ultra-low oil circuit loss appreciably enhances the overall efficiency of the system.
The normally open solenoid valve automatically closes during emergency stops to prevent oil injection, thus ensuring system safety.
11)Excellent Air Filter:Our premier air filter exemplifies a remarkable standard of air purification, ensuring an impeccably clean air system with an advanced three-stage filtration process for superior air quality. It efficiently removes steam and dust, adhering to rigorous emission standards.
12)High-Quality Soundproof Cotton:Our sophisticated noise reduction housing, combined with premium soundproof cotton, dramatically minimizes operational vibrations and significantly enhances noise reduction, ensuring a quieter, more productive workspace.
13) Motor maintenance-free:Our innovative permanent magnet motor, devoid of internal bearings, eradicates the need for motor bearing maintenance and replacement, effectively reducing long-term maintenance costs and boosting reliability.
14) Noise reduction:Discover a new level of serenity and efficiency with our state-of-the-art two-stage compression technology, expertly designed to transform your industrial environment. This revolutionary system intelligently decreases the compression ratio, resulting in a notable reduction in operational noise, particularly during unloading phases. Experience the luxury of a quieter and more efficient workspace, enhancing your productivity and operational excellence with the Professional Industrial Screw Compressor by Sanzhi.
15) Effortless Maintenance and Service:Retain the simplicity and familiarity of a single-stage compressor's structure with our advanced two-stage compressor unit. We've expertly maintained the traditional systems while eliminating only the screw air end, ensuring maintenance and servicing are straightforward, convenient, and accessible to all. Enjoy the ease of hassle-free upkeep while benefiting from consistent and optimal 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 exceptional value by partnering with us. By sourcing directly from Sanzhi (Henan) Compressor Co., Ltd., you gain access to unbeatable factory-direct prices, keeping you at the forefront of a competitive market.
2. Direct Transactions
Capitalize on enhanced cost-efficiency and the assurance of direct transactions. All our offerings are supplied directly from the factory to you, ensuring maximum savings and reliability.
3. OEM & ODM Services
Unlock the potential of our extensive production and management capabilities. We provide tailored OEM and ODM services to meet your precise specifications, ensuring your unique needs are perfectly addressed.
4. Customized Solutions
We specialize in catering to non-standard and export orders, accommodating specific voltage, power, and pressure requirements. Reach out with your customization requests and let us deliver solutions that perfectly match your needs.
5. Small Order Acceptance
Initiate your engagement with a small trial order and witness the superior quality of our products firsthand, ensuring complete satisfaction before scaling up.
6. Rapid Delivery
Enjoy the peace of mind that comes with our swift and timely delivery services. We ensure your high-quality products are delivered promptly, keeping your operations smooth and uninterrupted.
7. Comprehensive Authorization
Enhance your distribution capabilities with our full authorization certificates. Confidently market and sell SANZHI brand products, backed by comprehensive certification.
Sanzhi (Henan) Compressor Co., Ltd is a prominent and highly esteemed manufacturer at the forefront of innovation, specializing in state-of-the-art screw air compressors and screw vacuum pumps. With an impressive legacy of over ten years in the industry, we offer an extensive and diverse product range. This includes normal and low-pressure screw air compressors, permanent magnet frequency conversion screw air compressors, two-stage compression screw air compressors, and models engineered specifically for laser cutting. Our lineup also features single-tank and double-tank mobile screw air compressors, as well as both electric and diesel mobile screw air compressors, not to mention our cutting-edge screw vacuum pumps.
Inside our advanced production facility, we've established cutting-edge multi-air compressor assembly lines that guarantee unparalleled efficiency and precision. Supported by a dedicated team of over 50 expert employees, we relentlessly refine our management systems, including ERP, to drastically reduce lead times, ensuring the swift delivery of superior quality products.
Our meticulously crafted management systems are steadfastly dedicated to maintaining the pinnacle of quality standards. With pride, we hold certification under the ISO9001 quality management system, adhering to stringent quality control protocols. Each machine undergoes rigorous inspections at multiple stages, from material checks and production assessments to pre-delivery evaluations, ensuring remarkable product reliability and excellence.
Our outstanding customer service journey begins with a pre-sales team offering expert guidance to choose the perfect air equipment tailored for various facilities. We provide extensive customization options, including appearance and configuration, and create tailored products to meet specific dealer demands through our comprehensive OEM services. Our professional sales and service team remains on standby, ready to deliver swift and efficient post-sales support, ensuring your needs are promptly addressed.
At Sanzhi (Henan) Compressor Co., Ltd, we are resolute in our commitment to deliver superior, dependable, and stable products. Our dedication to forging enduring relationships with our clients promises efficient delivery, high-quality machinery, and competitive pricing, ensuring you receive the optimal compressed air solution that perfectly matches your needs.
Nestled in the charming Xinzheng City, Henan Province, China, our factory is ideally located a mere 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!
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.
Q2. How do you control quality?
A: 1. Our raw materials undergo rigorous inspection to ensure the highest quality.
2. The meticulous installation process is stringently monitored.
3. Every machine is subjected to a minimum of 5 continuous hours of testing before dispatch to ensure 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 tailor a perfect solution 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: Sanzhi proudly presents a versatile selection of voltage options, including 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, and 440v/60hz/3p. We also offer bespoke customization to flawlessly align with your unique specifications.
Q6. How long is the delivery time?
A: For standard voltage units, expect a swift delivery within 15 working days after order confirmation. For units requiring non-standard specifications, we invite you to engage with our dedicated sales team for personalized delivery timelines.
Q7. What's the payment term?
A: Our flexible payment terms are as follows: an initial 30% T/T deposit, an additional 40% T/T prior to shipment, and the final 30% T/T upon presentation of the B/L copy. We accommodate payments in both USD and RMB for your convenience.
Q8. How about your warranty?
A: We provide an all-encompassing warranty: one year for the entire machinery and an extended two-year warranty on the screw air compressor, with the exception of consumable spare parts, ensuring peace of mind and reliability.
Q9. What about the maintenance?
A: Initial maintenance is essential after 500 hours of operation. Subsequent maintenance intervals are recommended at every 2000-3000 hours, with adjustments made for your specific working conditions to ensure optimal performance.
Q10. Can machines be run in high-temperature environment?
A: Certainly, our machines are ingeniously crafted to maintain peak performance in high-temperature settings, with an impressive working temperature capacity ranging from -20° to 45° (-4ºF to 113ºF).
Q11. Do you offer OEM service?
A: Absolutely, we excel in delivering both OEM & ODM services, supported by our expert design team. Custom orders are not only welcomed but also executed with precision and excellence.
Q12. How long could your air compressor be used?
A: Our air compressors are meticulously designed for enduring performance, with an expected service life that typically surpasses a decade, providing long-lasting reliability and efficiency.
Q13. Will you provide some spare parts for the machines?
A: Certainly, we offer an extensive selection of premium spare parts to ensure your machinery operates with seamless efficiency and prolonged longevity, maintaining peak performance at all times.
Q14. How about your after-sales service?
A: We deliver unparalleled after-sales service, featuring comprehensive online guidance for installation and commissioning. Furthermore, we offer the option to dispatch our expert engineers for hands-on training and precise installation assistance, tailored to your needs.
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