Internal Structure Frontside
Internal Structure Backside
Working Principle
In an ideal air compression scenario, the energy required for single-stage pressure transmission equals the cumulative energy needed for multi-stage compression. However, in real-world applications, factors such as coupling transmission losses, bearing friction, and the cooling effect of viscosity increase the actual operational power needed. By reducing the compression ratio at each stage, we can significantly lower the overall power consumption in multi-stage compression, making it more efficient than single-stage compression.
The two-stage screw air compressor from Sanzhi (Henan) Compressor Co., Ltd. is a marvel of engineering, meticulously designed with an innovative dual-stage rotary screw system. This system features active and passive screws in each stage, where the active screw drives the passive screw using an external power mechanism, ensuring optimal performance. The first stage employs a low-pressure rate screw group, while the second stage utilizes a high-pressure rate screw group, both enveloped by a sealing air film. During operation, the air undergoes three crucial processes: suction, pressurization, and exhaust, delivering superior efficiency and reliability.
First Stage Compression: The initial phase of the two-stage screw air compressor begins with a low-pressure rate screw group compressing the gas between the screws. The gas is drawn into the compression chamber via the suction valve. As the screw rotor spins at high speed, the gas is gradually compressed and transported to the next stage, ensuring optimal efficiency and smooth performance.
Second Stage Compression: In this crucial stage, the gas enters a more confined screw space, leading to elevated temperatures and pressures. The exhaust valve then opens, releasing the high-pressure gases from the system, thus completing the second stage of compression with remarkable precision and consistency.
Natural air is initially drawn into the first compression stage through an air filter, where it mixes with a small amount of lubricating oil. This mixture is then compressed to an interstage pressure and passes through a cooling channel, where significant oil mist reduces its temperature substantially. The cooled gas moves on to the second-stage rotor for further compression, achieving the final exhaust pressure. Ultimately, the compressor expels the gas through the exhaust valve, completing the entire compression cycle with exceptional efficiency and reliability.
| 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:Experience exceptional energy efficiency with our PM motor! This cutting-edge technology boasts a wide-ranging constant torque and weak magnetic ranges, delivering an extraordinary 20-30% higher efficiency compared to traditional motors. Even beyond the rated frequency, our permanent magnet motor maintains its peak efficiency, ensuring outstanding performance at all times.
2) Maintenance-Free Motor:Eliminate the hassle and expense of bearing maintenance and replacements. Our advanced permanent magnet motor is engineered without bearings, providing a truly maintenance-free solution that saves both time and money.
3) Advanced Integrated Frequency Converter:Outfitted with China's top-tier frequency system, our unit excels in extensive speed regulation and unparalleled precision. It seamlessly adjusts to actual gas demand, delivering exceptional energy-saving performance with every operation.
4) Zero Transmission Loss:Experience 100% transmission efficiency through our compact, integrated shaft connection. The direct drive structure eliminates couplings and other transmission components, ensuring zero transmission loss and maximizing operational efficiency.
5) Variable and Soft Start MechanismsSafeguard your power grid equipment with our variable frequency start and soft start functionalities. These protection features minimize impact and prevent damage to electrical components, ensuring a longer lifespan for your machinery.
6) Enhanced Energy Conservation:Our unit features a frequency conversion range of 25% to 100%, compared to the conventional 50%-100%, resulting in more than 30% energy savings over fixed-speed compressors. For systems with fluctuating gas consumption, the energy-saving impact is even greater, making it ideal for diverse industrial needs.
7) Unique Two-Stage Compression Air End:Featuring an innovative two-stage compression screw design, our system integrates first and second-stage rotors within a single casing, driven by gears to achieve optimal linear speeds. This significantly enhances overall compression efficiency and reliability.
8) Innovative Internal Spray Curtain Cooling:Our high-energy-saving internal spray curtain cooling method drastically reduces compressed air temperature, achieving nearly isothermal compression. This groundbreaking approach minimizes pressure loss and boosts compression efficiency, setting new benchmarks in cooling technology.
9) Minimized Internal Leakage:Utilizing two-stage compression allows us to reduce the compression ratio for each stage, effectively minimizing internal leakage and enhancing volumetric efficiency. This ensures more reliable and consistent performance.
10) Superior Noise Reduction:Our two-stage compression process lowers the compression ratio, significantly reducing noise levels, especially during unloading. This ensures a quieter, more comfortable working environment.
11) Effortless Maintenance and Service:Maintenance and service are straightforward. Beyond the advanced screw air end, the systems and structures of our two-stage compressor are similar to single-stage units, ensuring user-friendly maintenance and operation, and reducing downtime.
12) Door panels are removable:Constructed with noise-reducing metal plates, the casing panel is lined with high-density sound-absorbing material, ensuring noise levels meet international standards. The door plate can be opened and disassembled, providing 270-degree all-round access for maintenance personnel.
1. Unbeatable Price Advantage
Experience unparalleled value with our highly competitive ex-factory prices. Stay ahead in the market with our cost-effective offerings, making your investment worthwhile.
2. Direct Transactions
Benefit from factory-direct deliveries, ensuring the most budget-friendly solutions reach you without intermediaries. Enjoy savings and efficiency.
3. Comprehensive OEM & ODM Services
With our robust production and management expertise, we flawlessly fulfill all your OEM and ODM service needs. Expect precision and complete satisfaction.
4. Tailored Customization
We cater to non-standard, export, and customized voltage/power/pressure orders. Share your unique requirements, and we will deliver solutions tailored exactly to your specifications.
5. Small Order Acceptance
Start with a small trial order to witness firsthand the superior quality and performance of our products. Experience excellence from the very beginning.
6. Rapid Delivery
Count on us for swift and timely delivery of top-notch products. Ensure your operations run smoothly without any delays.
7. Comprehensive Authorization
Empower your business as a valued distributor with our complete authorization certification. Confidently market and sell our prestigious SANZHI brand products.
Sanzhi (Henan) Compressor Co., Ltd, stands as a towering figure in the manufacturing world, specializing in the creation of premium screw air compressors and vacuum pumps, fortified by over a decade of relentless dedication. Our expansive product lineup features standard and low-pressure screw air compressors, cutting-edge permanent magnet frequency conversion models, two-stage compression units, specialized compressors for laser cutting, and adaptable mobile screw compressors. We provide single and double-tank configurations in both electric and diesel variants, along with pioneering screw vacuum pumps.
At the heart of our operations lies a commitment to efficiency and innovation, showcased by our advanced multi-air compressor assembly lines. Supported by a team of over 50 adept employees, we perpetually enhance our ERP-based management systems, drastically reducing lead times and ensuring the swift delivery of top-tier products.
Our adherence to stringent standards is reflected in our ISO9001 certification, a testament to our dedication to superior quality management. We rigorously implement comprehensive quality control protocols, with each machine undergoing meticulous material inspections, production assessments, and exhaustive pre-shipment evaluations to ensure the highest standards before departure from our facility.
Our commitment to customer service is unparalleled. Our pre-sales team provides expert guidance to help you select the ideal air equipment, complemented by extensive customization options for both appearance and configuration. We excel in producing bespoke OEM products tailored to the specific needs of dealers. Our after-sales team, composed of experienced professionals, ensures prompt and efficient responses to all customer queries and requirements.
At Sanzhi (Henan) Compressor Co., Ltd, we pledge to deliver high-performance, dependable products that build enduring customer relationships. Our streamlined delivery schedules, superior machines, and competitive pricing guarantee exceptional compressed air solutions with every order.
Conveniently situated in Xinzheng City, Henan Province, China, our factory is easily accessible. We offer complimentary transportation from Xinzheng International Airport to our premises, a brief 30-kilometer journey that takes approximately an hour. We eagerly await your visit!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a dedicated manufacturer specializing in screw air compressors, with over a decade of professional experience.
Q2. How do you control quality?
A: 1. Rigorous inspection of raw materials.
2. Strict control of installation procedures.
3. Each machine undergoes a minimum of 5 hours of continuous testing before dispatch.
Q3. What information must I provide to get the suitable machine?
1. The required air delivery capacity (Unit: CFM or m³/Min).
2. The necessary working pressure (Unit: PSI, Bar, or Mpa).
3. The voltage and frequency of your location (V/Hz).
4. Any additional accessories needed, such as an air tank, filters, or air dryers.
Provide us with these details, and we will tailor a 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 compressors in voltages of 380V/50Hz/3P, 400V/50Hz/3P, 415V/50Hz/3P, 220V/60Hz/3P, 440V/60Hz/3P, and can customize according to your requirements.
Q6. How long is the delivery time?
A: For our standard voltage specifications, you can anticipate a swift lead time of approximately 15 working days post order confirmation. Should you require custom non-standard voltage specifications, please reach out to our dedicated sales team for a personalized delivery schedule. Your satisfaction is our priority, and we are committed to accommodating your unique needs with efficiency and professionalism.
Q7. What's the payment term?
A: Our payment terms are designed to be straightforward and secure: an initial 30% T/T deposit in advance, followed by 40% T/T before shipment, with the remaining 30% T/T due upon receipt of the B/L copy. We accept payments in both USD and RMB to ensure convenience and flexibility for our valued customers.
Q8. How about your warranty?
A: We offer an industry-leading warranty, which includes one year of comprehensive coverage for the entire machine, and an extended two-year warranty specifically for the screw air compressor, excluding consumable spare parts. This ensures your investment is protected and provides peace of mind over the long term.
Q9. What about the maintenance?
A: Initial maintenance should be conducted after 500 hours of operation. Subsequently, routine maintenance intervals are recommended between 2000-3000 hours, depending on specific working conditions, to ensure optimal performance. Regular upkeep guarantees the longevity and efficiency of our high-performance compressors.
Q10. Can machines be run in high-temperature environment?
A: Absolutely, our machines are meticulously engineered to perform efficiently even in high-temperature environments, with an operational temperature range from -20° to 45° (-4ºF to 113ºF). This robust design ensures reliable performance under challenging conditions.
Q11. Do you offer OEM service?
A: Yes, we offer both OEM and ODM services. Our professional design team is committed to providing flexible solutions to meet your specific requirements. Whether you need tailored designs or branding, we have the expertise to deliver excellence.
Q12. How long could your air compressor be used?
A: Our air compressors are engineered for exceptional durability, typically offering a lifespan that exceeds 10 years. This long-term reliability makes our compressors a valuable investment for any industry.
Q13. Will you provide some spare parts for the machines?
A: Yes, we ensure the availability of spare parts for all our machines to guarantee seamless operation. Our commitment to providing essential components helps maintain the efficiency and longevity of your equipment.
Q14. How about your after-sales service?
A: We provide comprehensive after-sales support, including online guidance for installation and commissioning. Additionally, we can dispatch experienced engineers for on-site training and installation assistance to ensure your satisfaction. Our after-sales service is designed to ensure you get the most out of your investment.
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