Introducing the groundbreaking Low-Pressure Compressor, masterfully designed by Sanzhi (Henan) Compressor Co., Ltd.! Experience the pinnacle of industrial innovation with the Two-Stage Compression Permanent Magnet Variable Frequency Drive Screw Air Compressor. This marvel of engineering is poised to set new standards of excellence, offering a versatile range of power options to suit all your professional needs: 15KW, 22KW, 30KW, 37KW, 45KW, 55KW, 75KW, 90KW, 110KW, 132KW, 160KW, 185KW, 200KW, and 250KW. Ensuring unmatched efficiency and reliability, this state-of-the-art solution is meticulously crafted to cater to the diverse and rigorous demands of contemporary industries. Elevate your operations to new heights with this revolutionary compressor, designed to transform and enhance your industrial capabilities. Harness the power of innovation and stay ahead in your field with Sanzhi's commitment to quality and precision engineering, promising an unparalleled industrial experience that combines cutting-edge technology with exceptional durability. Unleash the true potential of your operations and redefine success with our Durable Heavy Duty Two-Stage Permanent Magnet VFD Screw Compressor, tailored for industry use.
Internal Structure Frontside
Internal Structure Backside
Working Principle
In the realm of air compression, achieving optimal energy efficiency is crucial. Ideally, the energy required for single-stage pressure transmission should match the cumulative energy of multi-stage compression. However, in practical scenarios, factors such as coupling power losses, bearing friction, and the cooling effects of fluid viscosity increase operational power demands. By reducing the compression ratio at each stage, these inefficiencies are minimized. Thus, multi-stage compression ultimately results in more efficient and lower total power consumption compared to single-stage compression.
Introducing our cutting-edge two-stage screw air compressor, a marvel of modern engineering. This advanced system boasts a sophisticated twin-stage rotary screw mechanism, featuring an active screw in each stage that energetically drives a passive screw through a robust external power transmission system. The process begins with a low-pressure screw group in the first stage, followed by a high-pressure screw group in the second stage. Each screw is meticulously encased within a sealing air film, ensuring precision. Throughout operation, the gas undergoes a comprehensive tri-phase process of suction, pressurization, and exhaust, achieving unparalleled compression efficiency.
First Stage Compression: At the very start of the compression process in our two-stage screw air compressor, 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 high-speed rotation of the screw rotor effectively compresses it, setting the stage for a seamless transition to the second stage.
Second Stage Compression: In the second stage screw group, the gas experiences further compression within a more confined screw space. This process results in increased temperatures and pressures. The cycle reaches its peak when the exhaust valve opens, allowing the high-pressure gases to exit the system and complete the compression cycle.
Natural air is initially drawn through the air filter into the first compression stage, where it blends with a carefully measured amount of lubricating oil. This mixture is compressed to an intermediary pressure and then channeled through a cooling system. Here, it encounters a substantial oil mist, significantly lowering its temperature. The cooled, compressed gas then advances to the second-stage rotor, where it undergoes final compression to reach the ultimate exhaust pressure. The fully compressed gas exits the system through the exhaust valve, successfully completing the compression cycle.
1) High efficiency of PM motor:Experience unparalleled efficiency with our state-of-the-art permanent magnet motor. Thanks to its vast constant torque and magnetic range, it surpasses traditional motors by an impressive 20-30%. Even when the motor isn't operating at its rated frequency, it maintains exceptional efficiency, ensuring top-tier performance and reliability at all times.
2) Two-stage compression unique air end:Presenting our revolutionary two-stage compression screw machine, which boasts an ingeniously designed air end. The integration of first and second-stage compression rotors within a single casing, driven by gears, achieves optimal linear speeds for each rotor, setting new standards for compression efficiency and performance.
3) Integrated frequency converter: Equipped with China's premier frequency system, our air compressor provides a broad speed regulation range with remarkable precision. This allows users to adjust the frequency to perfectly match actual gas needs, resulting in significant energy savings and enhanced operational effectiveness.
4) Reduce internal leakage:Leveraging advanced two-stage compression technology, we reduce the compression ratio for each stage, significantly minimizing internal leakage from high to low-pressure ends. This innovation not only boosts volumetric efficiency but also sets a new standard for performance.
5) Variable frequency start and soft startof the motor are flawlessly executed, significantly reducing the impact on power grid equipment and protecting electrical components from potential harm.
6) Reduce energy consumption: Our advanced frequency conversion spans from 25% to 100%, a notable improvement from the conventional 50% to 100% range. In comparison to fixed-speed air compressors, our solution can achieve energy savings over 30%. It also offers around 5% more efficiency compared to standard variable frequency compressors, optimizing savings for systems with variable gas demands.
7) No transmission loss: The seamless integration of our permanent magnet motor and compressor via an integrated shaft direct connection design ensures exceptional compactness. Eliminating couplings and other transmission parts, this design achieves an extraordinary transmission efficiency of 100%.
8) Air cooling method: Our premium energy-efficient air cooling method delivers outstanding cooling performance by significantly reducing the temperature of compressed air. This nearly isothermal compression minimizes pressure loss between stages, decreases the compression ratio, and boosts overall system efficiency.
9)Smart Touch Controller: Step into the future of convenience with our sophisticated smart touch controller. Featuring a high-precision color electronic screen, it offers clear graphical displays, maintenance data, fault alerts, and safety shutdown signals, minimizing manual intervention and streamlining operations with ease.
10)Special Type Intake Valve:Featuring an automatically controlled opening, it ensures uninterrupted engine fuel injection and lubricating oil circulation, thereby escalating overall efficiency. In emergencies, the normally open solenoid valve automatically closes to prevent oil injection, ensuring the utmost system safety.
The ultra-low oil circuit loss significantly boosts overall efficiency.
In emergencies, the normally open solenoid valve automatically closes to prevent oil injection, ensuring the utmost system safety.
11)Excellent Air Filter:Our high-grade air filter excels in purifying the air, ensuring a pristine air system through comprehensive three-stage filtration for superior air quality. It effectively removes steam and dust, meeting even the most stringent emission standards.
12)High-Quality Soundproof Cotton:Our advanced noise reduction housing, paired with superior soundproof cotton, reduces operational vibrations and enhances noise reduction significantly, ensuring a quieter and more efficient workspace.
13) Motor maintenance-free:Our groundbreaking permanent magnet motor is engineered without internal bearings, effectively eliminating the need for motor bearing maintenance and replacement. This innovative design substantially reduces long-term maintenance costs while significantly enhancing system reliability, ensuring your operations remain smooth and trouble-free.
14) Noise reduction:Immerse yourself in unparalleled tranquility with our cutting-edge two-stage compression technology. This sophisticated system expertly minimizes the compression ratio, leading to a dramatic reduction in operational noise levels, especially during unloading phases. Delight in a quieter, more efficient work environment that naturally enhances your productivity with the Professional Industrial Screw Compressor, an exquisite innovation by Sanzhi.
15) Effortless Maintenance and Service:Our revolutionary two-stage compressor unit cleverly preserves the familiar structure and systems of a single-stage compressor. By simply excluding the screw air end, we ensure that maintenance and service are straightforward and easily manageable for everyone. Experience hassle-free upkeep while enjoying unwavering, top-tier 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
Partner with Sanzhi (Henan) Compressor Co., Ltd. to unlock extraordinary value. By choosing us, you gain access to unparalleled factory-direct pricing, setting you apart in the competitive marketplace and ensuring you stay ahead.
2. Direct Transactions
Experience the ultimate in cost-efficiency and secure dealings. Our products are delivered directly from the factory to your hands, providing you with unmatched savings and reliability.
3. OEM & ODM Services
Leverage the depth of our expansive production and management expertise. We offer personalized OEM and ODM services tailored to your precise specifications, ensuring your unique needs are met with exactitude.
4. Tailored Solutions
With a focus on non-standard and export orders, we provide solutions customized to your specific voltage, power, and pressure requirements. Contact us with your customization needs, and we will deliver solutions that fit your demands seamlessly.
5. Small Order Acceptance
Begin your partnership with a small trial order to witness firsthand the exceptional quality of our products, guaranteeing your satisfaction before you commit to larger orders.
6. Swift Delivery
Enjoy the peace of mind that comes with our speedy and efficient delivery services. We ensure your top-quality products arrive punctually, facilitating the smooth operation of your business.
7. Comprehensive Authorization
Enhance your distribution capabilities with our full range of authorization certificates. Market and sell SANZHI brand products with confidence, backed by comprehensive certification support.
Sanzhi (Henan) Compressor Co., Ltd is a prestigious and renowned manufacturer, adept in the production of state-of-the-art screw air compressors and screw vacuum pumps. With an unrivaled decade of industry expertise, we present a diverse and all-encompassing product range that includes normal pressure and low-pressure screw air compressors, permanent magnet frequency conversion screw air compressors, two-stage compression screw air compressors, and laser-cutting specific screw air compressors. Our offerings also feature single-tank and double-tank mobile screw air compressors, available in both electric and diesel variants, as well as cutting-edge screw vacuum pumps.
Our cutting-edge production facility is equipped with advanced multi-air compressor assembly lines, guaranteeing exceptional efficiency and precision. Supported by a dedicated team of over 50 highly skilled personnel, we perpetually fine-tune our management systems, such as ERP, significantly reducing lead times and ensuring the swift delivery of premium quality products.
Our precisely developed management systems are resolute in upholding the highest quality standards. Proudly accredited with the ISO9001 quality management system certification, we adhere to stringent quality control protocols. Each machine is subjected to comprehensive inspections at multiple phases, from material checks to production assessments and pre-delivery evaluations, assuring unmatched product reliability and excellence.
Our outstanding customer service commences with a pre-sales team providing expert guidance to help you select the ideal air equipment tailored for various facilities. We offer extensive customization options, covering appearance and configuration, and craft bespoke products to meet specific dealer requirements through our OEM services. Our professional sales and service team is perpetually on standby to deliver prompt and efficient post-sales support, swiftly addressing your needs.
At Sanzhi (Henan) Compressor Co., Ltd, we are unwavering in our pledge to provide superior, reliable, and stable products. Committed to nurturing long-term relationships with our clients, we guarantee efficient delivery, top-quality 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 factory is ideally situated merely 30 kilometers from Xinzheng International Airport, approximately an hour's drive away. We warmly extend an invitation for you to visit our facility and personally experience our exceptional offerings!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a distinguished manufacturer with a specialization in screw air compressors, proudly boasting over a decade of industry expertise.
Q2. How do you control quality?
A: 1. Our raw materials are subjected to rigorous inspection processes to guarantee the highest quality.
2. The meticulous installation process is closely monitored to ensure precision.
3. Every machine undergoes a minimum of 5 continuous hours of rigorous 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 is thrilled to offer a comprehensive selection of voltage options, tailored meticulously to meet your distinct requirements. Choose effortlessly from a range that includes 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, and 440v/60hz/3p. Customize your equipment seamlessly to perfectly align with your specific applications, ensuring exceptional adaptability and performance.
Q6. How long is the delivery time?
A: Delight in swift order fulfillment with our standard voltage units, dispatched efficiently within 15 working days following order confirmation. For tailored configurations, our dedicated sales team stands ready to provide bespoke delivery solutions, ensuring your unique needs are met with precision and timeliness.
Q7. What's the payment term?
A: Enjoy flexible payment terms designed to suit your financial convenience: secure an initial 30% T/T in advance, followed by 40% T/T prior to shipment, and complete the transaction with a final 30% T/T post-B/L copy. We facilitate transactions seamlessly in both USD and RMB.
Q8. How about your warranty?
A: Take advantage of our comprehensive warranty package, offering one-year full machine coverage and an extended two-year warranty specifically for the screw air compressor, excluding consumable spare parts. This ensures peace of mind and consistent, reliable performance.
Q9. What about the maintenance?
A: Begin maintenance at 500 operational hours to uphold optimal performance, and continue with subsequent servicing every 2000-3000 hours. Tailor your maintenance schedule based on actual working conditions, ensuring peak efficiency and longevity of the equipment.
Q10. Can machines be run in high-temperature environment?
A: Absolutely! Our machines are engineered to excel in high-temperature environments, operating smoothly across an extensive temperature range from -20° to 45° (-4ºF to 113ºF). This design ensures consistent performance even under the most demanding conditions.
Q11. Do you offer OEM service?
A: Indeed, we proudly offer specialized OEM & ODM services, supported by our expert design team. We welcome your custom visions and transform them into reality, backed by our exceptional design capabilities and bespoke order solutions.
Q12. How long could your air compressor be used?
A: Our air compressors are expertly crafted to ensure durability and longevity, typically guaranteeing over a decade of reliable service life. This ensures sustained peak performance and outstanding value for years to come.
Q13. Will you provide some spare parts for the machines?
A: Certainly! We supply an extensive selection of high-quality spare parts, ensuring your machinery operates smoothly and efficiently over extended periods. This maximizes longevity and guarantees peak functionality.
Q14. How about your after-sales service?
A: Experience unparalleled after-sales service with our comprehensive online installation and commissioning support. Additionally, benefit from the expertise of our skilled engineers, who provide on-site training and precise installation assistance as needed, ensuring optimal equipment operation and satisfaction.
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