Introducing the revolutionary Low-Pressure Compressor from Sanzhi (Henan) Compressor Co., Ltd.! Experience unparalleled industrial excellence with our cutting-edge Two-Stage Compression Permanent Magnet Variable Frequency Drive Screw Air Compressor. Expertly engineered for peak performance, this innovative solution is available in a comprehensive range of power options: 15KW, 22KW, 30KW, 37KW, 45KW, 55KW, 75KW, 90KW, 110KW, 132KW, 160KW, 185KW, 200KW, and 250KW. Elevate your operations to new heights with this state-of-the-art compressor, meticulously designed to cater to the diverse demands of the modern industrial landscape, ensuring unmatched efficiency and steadfast reliability.
Internal Structure Frontside
Internal Structure Backside
Working Principle
In the ideal air compression process, the power required for single-stage compression equals the sum needed for multi-stage compression. Nevertheless, deviations arise due to factors like coupling transmission power loss, bearing friction, and liquid viscosity cooling. These elements elevate the actual working power. By distributing the compression ratio across multiple stages, power inefficiencies are curtailed, resulting in the overall power consumption for multi-stage compression being lower than that for single-stage compression.
The two-stage screw air compressor exemplifies sophisticated engineering with its two-stage rotary screw mechanism. Each stage is equipped with an active screw, driving a passive screw via an external power transmission system. Initially, a low-pressure screw group manages the first stage, while a high-pressure screw group handles the second stage. Each screw is encased in a sealing air film. As the screws rotate, gas undergoes three key phases: suction, pressurization, and exhaust, facilitating highly efficient compression.
First Stage Compression: The initial phase uses a low-pressure screw group to compress the gas. Gas enters the compression chamber through the suction valve and is compressed by the high-speed rotation of the screw rotor, after which it is transferred to the second stage.
Second Stage Compression: In the second stage, the gas is further compressed within a more confined screw space, reaching higher temperatures and pressures. The exhaust valve then releases the high-pressure gas from the system, completing the compression cycle.
Natural air is drawn through the air filter into the first compression stage, where it mixes with a small amount of lubricating oil. This mixture is compressed to an interstage pressure and then enters the cooling channel. Here, it interacts with substantial oil mist, significantly lowering its temperature. The cooled, compressed gas then moves to the second-stage rotor for its final compression to the ultimate exhaust pressure. The fully compressed gas exits through the exhaust valve, concluding the compression cycle.
1) High Efficiency of PM Motor:Experience unparalleled efficiency with our advanced permanent magnet motor. Its constant torque and weak magnetic ranges are impressively wider, providing a remarkable 20-30% efficiency boost over conventional motors. Even when not operating at the rated frequency, the motor maintains its superior efficiency, ensuring optimal performance at all times.
2) Two-Stage Compression Unique Air End:Our revolutionary two-stage compression screw machine features a uniquely designed air end. The first and second-stage compression rotors are housed within a single casing and directly driven by gears. This design enables each rotor to achieve the optimal linear speed, thereby maximizing compression efficiency.
3) Integrated Frequency Converter:Equipped with China's premier frequency system, our air compressor offers a broad speed regulation range and high precision. Users can adjust the frequency based on actual gas demand, leading to significant energy savings and enhanced operational efficiency.
4) Reduce Internal Leakage:Our two-stage compression technology decreases the compression ratio for each stage, thus minimizing internal leakage from the high-pressure end to the low-pressure end and significantly enhancing volumetric efficiency.
5) Variable Frequency Start and Soft Start:Our motor features variable frequency start and soft start capabilities, substantially reducing the impact on power grid equipment and preventing damage to electrical components.
6) Reduce Energy Consumption:Our frequency conversion operates from 25% to 100%, a vast improvement over the typical 50% to 100% range. Compared to fixed-speed air compressors, energy savings can exceed 30%. Even against regular variable frequency compressors, it offers around 5% more energy efficiency, providing greater savings for systems with fluctuating gas demands.
7) No Transmission Loss:The permanent magnet motor and compressor utilize an embedded integrated shaft direct connection structure, making the system more compact. With no couplings or other transmission parts, the transmission efficiency reaches an unmatched 100%.
8) Air Cooling Method:Our highly efficient air cooling method provides excellent cooling performance, significantly reducing the temperature of compressed air. This near-isothermal compression also minimizes pressure loss between stages, reducing the compression ratio and enhancing overall efficiency.
9)Smart Touch Controller::Our state-of-the-art built-in intelligence requires minimal manual operation. Featuring a high-precision color electronic screen, it offers clear graphical displays, maintenance information, fault alarms, and safety shutdown alerts for seamless operation.
10)Special Type Intake Valve:The automatically controlled opening ensures smooth engine fuel injection and lubricating oil circulation.
Ultra-low oil circuit loss enhances overall efficiency.
The normally open solenoid valve automatically closes during emergency stops to prevent oil injection, ensuring system safety.
11)Excellent Air Filter:Our top-tier air filter boasts exceptional air purification capabilities, ensuring a clean air system with three-stage filtration for superior air quality. It efficiently removes steam and dust, meeting stringent emission standards.
12)High-Quality Soundproof Cotton:Our compact noise reduction housing, combined with high-quality soundproof cotton, minimizes operational vibration and significantly enhances noise reduction, ensuring a quieter, more efficient workspace.
13) Motor Maintenance-Free:Our permanent magnet motor, free of internal bearings, eliminates the need for motor bearing maintenance and replacement, reducing long-term maintenance costs and enhancing reliability.
14)Noise reduction:Experience unparalleled tranquility with our two-stage compression technology, which significantly lowers the compression ratio, resulting in a dramatic reduction in operational noise, especially noticeable during unloading. Revel in the ultimate peace and quiet as our compressor silently delivers its powerful performance.
15)Easy to do maintenance and service:Our two-stage compressor unit maintains the familiar structure and systems of a single-stage compressor, with the exception of the screw air end. This design ensures that maintenance and service are straightforward, user-friendly, and efficient, even for those accustomed to traditional single-stage units. Enjoy hassle-free upkeep with our intuitive design.
| 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
Benefit from our direct factory prices, designed to give you a competitive edge with unrivaled rates, ensuring you lead the market.
2. Direct Transactions
Receive products directly from the factory, enhancing cost-effectiveness and ensuring seamless sourcing with no middlemen.
3. OEM & ODM Services
Leverage our robust production and management capabilities for comprehensive OEM/ODM services meticulously crafted to your specifications.
4. Customized Solutions
We accommodate non-standard, export orders with specific voltage, power, and pressure needs. Reach out with your customization requirements.
5. Small Order Acceptance
Initiate with a small trial order to experience the superior quality of our offerings firsthand.
6. Rapid Delivery
Access top-tier products with swift and reliable delivery, ensuring your operations run smoothly without interruptions.
7. Comprehensive Authorization
Our esteemed distributors receive full authorization certificates, enhancing your ability to market and distribute SANZHI brand products with assured confidence.
Sanzhi (Henan) Compressor Co., Ltd is a prestigious manufacturer specializing in the production of screw air compressors and screw vacuum pumps. With over a decade of industry expertise, we offer a comprehensive product range that includes both normal and low-pressure screw air compressors, permanent magnet frequency conversion screw air compressors, two-stage compression models, laser cutting-specific screw air compressors, single-tank and double-tank mobile units, electric and diesel mobile screw air compressors, and screw vacuum pumps. Our extensive portfolio ensures we have a solution for any application.
Our state-of-the-art production facility boasts multi-air compressor assembly lines, guaranteeing unparalleled efficiency. Supported by a dedicated team of over 50 skilled employees, we continually refine our management systems, such as ERP, to minimize lead times and ensure rapid delivery of top-quality products. This seamless integration of advanced technology and expert staff ensures we consistently meet the highest standards of manufacturing excellence.
Our rigorous management systems are designed to uphold the highest standards of quality, certified under the ISO9001 quality management system. We rigorously follow strict quality control protocols, ensuring that every machine undergoes comprehensive inspections at various stages, from material and production checks to pre-delivery evaluations. This meticulous approach guarantees unmatched product reliability and excellence, providing our customers with peace of mind.
Our commitment to customer service is unwavering. Our pre-sales team offers expert guidance to help you select the ideal air equipment for diverse facilities, along with extensive customization options, including appearance and configuration. We also specialize in creating bespoke products to meet the specific demands of our dealers through our OEM services. Furthermore, our professional sales and service team is always ready to provide prompt post-sales support, ensuring swift responses to any customer needs and maintaining high levels of customer satisfaction.
At Sanzhi (Henan) Compressor Co., Ltd, we are dedicated to delivering superior, reliable, and stable products. We aim to forge long-term relationships with our clients by promising efficient delivery, high-quality machinery, and competitive pricing. Our steadfast commitment ensures that you receive an optimal compressed air solution tailored to your exact requirements.
Nestled in the heart of Xinzheng City, Henan Province, China, our factory is conveniently located just 30 kilometers from Xinzheng International Airport, approximately a one-hour drive. We warmly welcome you to visit our state-of-the-art 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 offers a range of voltages including 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, 440v/60hz/3p, with customization options to meet your specific requirements.
Q6. How long is the delivery time?
A: For standard voltage units, delivery is within 15 working days post order confirmation. For non-standard requirements, please contact our sales team.
Q7. What's the payment term?
A: Payment terms include 30% T/T in advance, 40% T/T before shipment, and the remaining 30% T/T upon B/L copy. Payments can be made in USD or RMB.
Q8. How about your warranty?
A: We offer a comprehensive warranty of one year for the entire machine and two years for the screw air compressor, excluding consumable spare parts.
Q9. What about the maintenance?
A: The initial maintenance is required after 500 hours of operation. Subsequent maintenance should be performed every 2000-3000 hours, taking into account the actual working environment.
Q10. Can machines be run in high-temperature environment?
A: Absolutely, our machines are designed to operate efficiently in high-temperature environments, with a working temperature range from -20° to 45° (-4ºF to 113ºF).
Q11. Do you offer OEM service?
A: Yes, we excel in both OEM & ODM services, backed by our professional design team. Your custom orders are highly welcomed.
Q12. How long could your air compressor be used?
A: Our air compressors are engineered for longevity, typically exceeding 10 years of service life.
Q13. Will you provide some spare parts for the machines?
A: Certainly! We offer a comprehensive range of premium spare parts meticulously designed to ensure the seamless and efficient operation of your machines.
Q14. How about your after-sales service?
A: We provide exceptional after-sales support that includes detailed online installation and commissioning guidance. Additionally, we can dispatch our expert engineers to offer on-site training and installation assistance whenever required.
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