Internal Structure Frontside
Internal Structure Backside
Working Principle
In the ideal scenario of air compression, the energy required for single-stage pressure transmission equates to the cumulative energy needed for multi-stage compression. In reality, due to factors such as coupling transmission losses, bearing friction, and the viscosity's cooling effect, the actual operational power increases. By minimizing the compression ratio at each stage, we can lower the overall power consumption in multi-stage compression, making it more efficient than single-stage compression.
The two-stage screw air compressor is engineered with a dual-stage rotary screw system, where each stage is equipped with both an active and passive screw. The active screw drives the passive screw with the help of an external power source. This innovative design employs a low-pressure rate screw group for the initial stage and transitions to a high-pressure rate screw group in the second stage. Each screw is encased in a sealing air film to optimize efficiency. As the screws rotate, the air undergoes a comprehensive transformation through three pivotal processes: suction, pressurization, and exhaust.
First Stage Compression: Within the initial stage of the two-stage screw air compressor, a specialized low-pressure rate screw group works diligently to compress the gas, which is drawn into the compression chamber via the suction valve. The high-speed rotation of the screw rotor compresses the gas, preparing it for the subsequent stage.
Second Stage Compression: As the gas progresses into this stage, it encounters a more confined screw space, significantly elevating its temperature and pressure. The exhaust valve opens strategically to release the high-pressure gases efficiently from the system, marking the culmination of the compression process.
Natural air is meticulously drawn into the first compression stage through an air filter, where it harmoniously blends with a precise amount of lubricating oil. This mixture is adeptly compressed to an interstage pressure. Post-compression, the gas journeys through a cooling channel, encountering a substantial oil mist that dramatically lowers its temperature. This cooled gas is then propelled into the second-stage rotor, undergoing further compression to achieve the desired final exhaust pressure. Ultimately, the compressor expertly expels the gas through the exhaust valve, flawlessly completing the entire compression cycle.
| Sanzhi (Henan) Compressor Co,. Ltd. |
| Two-Stage Compression Permanent Magnet Variable Frequency Screw Air 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) Unparalleled Efficiency of PM Motor:Explore the extraordinary efficiency of our PM motor, where innovation meets performance. With an expansive constant torque and weak magnetic range, enjoy a 20-30% boost in efficiency over traditional motors. Experience the power of consistent superior performance, even when deviating from rated frequencies.
2) Maintenance-Free Motor:Experience the revolutionary maintenance-free design of our permanent magnet motor. Ingeniously crafted without bearings, it eliminates the hassle and cost of bearing upkeep and replacement, providing you with a truly maintenance-free solution.
3) Advanced Integrated Frequency Converter:Harness the prowess of China's leading frequency system with our advanced integrated converter. Its extensive speed regulation and precision tailor perfectly to your gas demand, unlocking significant energy savings.
4) Zero Transmission Loss:Achieve perfect 100% transmission efficiency with our compact integrated shaft connection. By eliminating couplings and other components, we ensure zero transmission loss between the motor and compressor.
5) Variable and Soft Start MechanismsOur sophisticated mechanisms featuring variable frequency and soft start functions not only protect your power grid equipment from impact but also extend the lifespan of your electrical components by minimizing potential damage.
6) Enhanced Energy Conservation:Our product shines with an impressive frequency conversion range of 25% to 100%, delivering over 30% energy savings compared to fixed-speed compressors. Especially beneficial for systems with varying gas demands, the energy conservation achieved is truly remarkable.
7) Unique Two-Stage Compression Air End:Discover the significant benefits of our two-stage compression screw design, where both the first and second-stage rotors are harmoniously integrated. Driven by gears, this design optimizes linear speeds, multiplying the efficiency of overall compression.
8) Innovative Internal Spray Curtain Cooling:Our cutting-edge internal spray curtain cooling technique slashes compressed air temperature, achieving nearly isothermal compression. This avant-garde approach curtails pressure loss while enhancing compression efficiency.
9) Minimized Internal Leakage:The two-stage compression method effectively reduces the compression ratio per stage, minimizing internal leakage and significantly boosting volumetric efficiency.
10) Superior Noise Reduction:Our innovative two-stage compression not only lowers the compression ratio but also substantially reduces noise, particularly noticeable during unloading, ensuring a quieter operation.
11) Effortless Maintenance and Service:Experience seamless maintenance and service with our two-stage compressor. Its system design, closely resembling single-stage units except for the screw air end, offers user-friendly operation and maintenance ease.
12) Door Panels are Removable:Our unit, built with sound-dampening metal panels and lined with high-density sound-absorbing materials, meets international noise standards. The innovative design of removable door panels allows for extensive 270-degree access, significantly easing maintenance and elevating service efficiency.
1. Unbeatable Price Advantage
We are proud to offer our esteemed customers a unique opportunity to benefit from our competitive, factory-direct pricing. This allows you to maintain a significant advantage in the ever-evolving market landscape.
2. Direct Transactions
By leveraging direct factory supply for all our offerings, we are perfectly positioned to present you with the most economical solutions available, maximizing value in every transaction.
3. Comprehensive OEM & ODM Services
With our vast production expertise and robust management capabilities, we seamlessly fulfill all your OEM/ODM service requirements with unmatched precision and efficiency.
4. Tailored Customization
Delight in our bespoke approach through custom orders that cater to non-standard, export-specific voltage, power, and pressure specifications. Engage with us to discuss your unique needs, and we will craft a solution that perfectly aligns with your demands.
5. Small Order Acceptance
Start with a small trial order and witness firsthand the superior quality that our products consistently deliver, ensuring your satisfaction and confidence.
6. Rapid Delivery
Our unwavering commitment to timely delivery ensures our high-quality products reach you swiftly, keeping your operations seamless and on track without any disruptions.
7. Comprehensive Authorization
We offer complete authorization certification to our valued distributors, empowering you to confidently market our prestigious SANZHI brand products with full assurance and credibility.
Sanzhi (Henan) Compressor Co., Ltd. stands as a distinguished leader in the manufacturing realm, celebrated for our specialized expertise in screw air compressors and screw vacuum pumps. With over ten years of refined industry prowess under our belt, we offer an expansive array of products. Our impressive lineup encompasses normal pressure and low-pressure screw air compressors, cutting-edge permanent magnet frequency conversion screw air compressors, advanced two-stage compression screw air compressors, specialized screw air compressors for laser cutting, dynamic single-tank and double-tank mobile screw air compressors, versatile electric and diesel mobile screw air compressors, and state-of-the-art screw vacuum pumps, among other innovations.
In our avant-garde production facility, we harness unmatched efficiency through our meticulously engineered, lean multi-air compressor assembly lines. Our operation is buoyed by a dedicated team of over 50 exceptional employees, thriving on continuous management system enhancements, including ERP, to seamlessly minimize lead times and guarantee the rapid delivery of superior quality products.
With an unwavering commitment to quality management, our factory proudly holds ISO9001 certification. We strictly observe rigorous quality management protocols, ensuring each machine is subject to comprehensive inspections, encompassing material checks, production evaluations, and rigorous pre-delivery assessments.
Our exemplary customer service journey spans from pre-sales to after-sales. Prior to purchase, we provide expert consultation to guide you in selecting the perfect air equipment, offering extensive customization, including bespoke OEM products tailored to meet specific dealer needs. Post-purchase, our highly skilled sales and service team remains at the ready, poised to swiftly address and fulfill customer requests.
At Sanzhi (Henan) Compressor Co., Ltd., we are unwaveringly devoted to delivering superior, dependable products while nurturing enduring customer relationships. Our steadfast commitment to efficient delivery, outstanding quality, and competitive pricing makes us your esteemed partner for the most effective compressed air solutions.
Our strategically situated factory in Xinzheng City, Henan Province, China, offers complimentary transportation from Xinzheng International Airport, located just 30 kilometers away. This convenient, approximately one-hour journey ensures a warm welcome to our esteemed company!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a distinguished manufacturer specializing in screw air compressors, boasting over a decade of industry excellence.
Q2. How do you control quality?
A: 1. We conduct rigorous inspections of all raw materials to ensure top-notch quality.
2. We uphold strict control over installation procedures to maintain superior standards.
3. Every machine undergoes at least five hours of continuous testing before it is dispatched to guarantee reliability.
Q3. What information must I provide to get the suitable machine?
1. Desired air delivery capacity (Unit: CFM or m³/Min)
2. Required working pressure (Unit: PSI, Bar, or Mpa)
3. Voltage and frequency in your country (V/Hz)
4. Additional accessories needed, such as air tanks, filters, or air dryers.
Provide us with this precise information, and we will craft a tailored solution to perfectly suit your needs!
Q4. What is the general unit conversion?
1Bar = 0.1Mpa = 14.5PSI
1m³/min = 35.32cfm
1KW = 1.34HP
Q5. What are the available voltage options for air compressors?
A: Sanzhi air compressors are meticulously designed to accommodate a wide spectrum of voltage requirements, including 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, and 440v/60hz/3p. Moreover, we offer bespoke customization options to perfectly align with your precise specifications.
Q6. How long is the delivery time?
A: For orders with standard voltage configurations, we take immense pride in our ability to offer a swift delivery time of just 15 working days post order confirmation. For those with unique non-standard specifications, please reach out to our outstanding sales team for personalized and attentive assistance.
Q7. What's the payment term?
A: Our payment terms are crafted for flexibility and ease, allowing 30% T/T in advance, 40% T/T before shipment, and the final 30% T/T upon receipt of the B/L copy. Payments can be conveniently made in either USD or RMB.
Q8. How about your warranty?
A: We confidently back our products with a solid one-year warranty for the entire machine, complemented by an augmented two-year warranty exclusively for the screw air compressor. Please note that consumable spare parts are not included in this warranty.
Q9. What about the maintenance?
A: Initial maintenance is recommended after 500 hours of operation. Thereafter, regular maintenance is advised every 2000-3000 hours, adjusted to suit the actual working environment, ensuring peak performance and longevity of your equipment.
Q10. Can machines be run in high-temperature environment?
A: Certainly, our machines are expertly crafted to deliver outstanding performance in high-temperature environments, confidently operating within a temperature spectrum of -20° to 45°(-4ºF to 113ºF).
Q11. Do you offer OEM service?
A: Absolutely! We are thrilled to provide OEM & ODM services. Our adept design team is ready to embrace and fulfill customized orders to meet your distinct requirements seamlessly.
Q12. How long could your air compressor be used?
A: Our air compressors are engineered for remarkable longevity, designed to consistently deliver reliable performance for over a decade.
Q13. Will you provide some spare parts for the machines?
A: Certainly, to ensure the seamless operation of your machines, we provide essential spare parts as required, ensuring your operations remain unhindered.
Q14. How about your after-sales service?
A: We furnish a comprehensive array of after-sales services, including online guidance for installation and commissioning. Additionally, we can dispatch our expert engineers to provide hands-on training and installation support, ensuring an effortless experience.
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