Detailed Internal Structure: Frontside View
Detailed Internal Structure: Backside View
Advanced 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, designed with a dual-stage rotary screw system that features both active and passive screws at each compression stage. The active screw propels the passive screw via an external power mechanism, enhancing operational performance. The first stage employs a low-pressure rate screw group, while the second stage employs 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.
First Stage Compression: The initial phase of the two-stage screw air compressor involves compressing the gas between a low-pressure rate screw group. Gas is drawn into the compression chamber through the suction valve. As the screw rotor whirls at high speed, the gas is incrementally compressed and transported to the subsequent stage, ensuring superior efficiency.
Second Stage Compression: In this advanced phase, the gas is directed into a more restricted screw space, resulting in elevated temperatures and pressures. The exhaust valve then opens to release the high-pressure gases, effectively completing the second stage of compression.
Natural air is first ingested into the initial compression stage via an air filter, mixing with a small quantity of lubricating oil. This mixture is compressed to an interstage pressure before traversing a cooling channel, where significant oil mist drastically reduces its temperature. The cooled gas then proceeds to the second-stage rotor for enhanced compression, achieving the final exhaust pressure. Ultimately, the compressor expels the gas through the exhaust valve, culminating the entire compression cycle with unparalleled efficiency.
| 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 unprecedented efficiency with our PM motor! Designed for wide-ranging constant torque and weak magnetic ranges, it delivers an impressive 20-30% higher efficiency compared to traditional motors. Even beyond the rated frequency, our permanent magnet motor maintains superior efficiency, ensuring exceptional performance at all times.
2) Maintenance-Free Motor:Say goodbye to costly bearing maintenance and replacements. Our innovative permanent magnet motor is designed without bearings, ensuring a truly maintenance-free experience, saving you both time and money.
3) Advanced Integrated Frequency Converter:Equipped with China's premier frequency system, our unit offers extensive speed regulation and unparalleled precision. It adapts seamlessly to actual gas demand, delivering remarkable energy-saving performance with every use.
4) Zero Transmission Loss:Achieve 100% transmission efficiency with 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 Mechanisms:Protect your power grid equipment with our variable frequency start and soft start functionalities. These features minimize impact and prevent damage to electrical components, ensuring a longer lifespan for your machinery.
6) Enhanced Energy Conservation:Our unit's frequency conversion range of 25% to 100%, compared to the ordinary 50%-100%, results in over 30% energy savings compared to fixed-speed compressors. In systems with fluctuating gas consumption, the energy-saving impact is even more substantial, making it ideal for varied industrial needs.
7) Unique Two-Stage Compression Air End:Our innovative two-stage compression screw design integrates first and second-stage rotors within a single casing, with gears driving each stage to achieve optimal linear speeds, significantly enhancing overall compression efficiency and reliability.
8) Innovative Internal Spray Curtain Cooling:Our high-energy saving internal spray curtain cooling method significantly reduces compressed air temperature, achieving nearly isothermal compression. This innovative approach reduces pressure loss and enhances compression efficiency, setting new standards in cooling technology.
9) Minimized Internal Leakage:By utilizing two-stage compression, we lower the compression ratio for each stage, effectively reducing internal leakage and improving volumetric efficiency. This results in more reliable and consistent performance.
10) Superior Noise Reduction:Our two-stage compression process not only reduces the compression ratio but also significantly lowers noise levels, particularly during unloading, ensuring a quieter and more comfortable working environment.
11) Effortless Maintenance and Service:Maintenance and service are a breeze. Apart from the advanced screw air end, our two-stage compressor's systems and structures are akin to single-stage units, ensuring user-friendly maintenance and operation, and reducing downtime.
12) Door panels are removable:The unit's casing is constructed from metal plates treated for noise reduction, and the casing panel is equipped with high-density sound-absorbing material, ensuring the noise level meets international standards. The door plate can be opened and disassembled, offering a 270-degree all-round space, facilitating maintenance personnel access to the inside of the unit.
1. Unbeatable Price Advantage
Experience unparalleled value with our highly competitive ex-factory prices. Stay ahead in the competitive market with our cost-effective offerings.
2. Direct Transactions
Benefit from factory-direct deliveries, ensuring the most budget-friendly solutions reach you without intermediaries.
3. Comprehensive OEM & ODM Services
Our vast expertise in production and management guarantees flawless fulfillment of all your OEM and ODM service needs, ensuring precision and satisfaction every step of the way.
4. Tailored Customization
We provide tailored solutions for non-standard, export, and customized voltage/power/pressure orders. Share your unique requirements, and we will deliver products specifically designed to meet your exact specifications.
5. Small Order Acceptance
Initiate your experience with a small trial order to witness the superior quality and unmatched performance of our products firsthand.
6. Rapid Delivery
Rely on us for swift and timely delivery of premium products, ensuring your operations run seamlessly without any delays.
7. Comprehensive Authorization
Empower your business as a valued distributor with our full authorization certification, enabling you to confidently market and sell our prestigious SANZHI brand products.
Sanzhi (Henan) Compressor Co., Ltd, a distinguished force in the manufacturing sector, excels in creating premium screw air compressors and vacuum pumps, backed by over a decade of steadfast dedication. Our comprehensive product line includes standard and low-pressure screw air compressors, cutting-edge permanent magnet frequency conversion models, two-stage compression units, specialized compressors for laser cutting, and versatile mobile screw compressors. We provide both single and double-tank configurations in electric and diesel options, along with innovative screw vacuum pumps.
Our production processes are the epitome of efficiency and modernity, featuring advanced multi-air compressor assembly lines. With a skilled team of over 50 employees, we continually refine our ERP-based management systems to significantly reduce lead times and ensure the prompt delivery of superior quality products.
Adhering to the highest standards, our factory proudly holds ISO9001 certification, reinforcing our commitment to quality management. We meticulously enforce stringent quality control measures, ensuring each machine undergoes comprehensive material inspections, production evaluations, and thorough pre-delivery checks.
Our customer service philosophy is unmatched. Our pre-sales team offers expert guidance to help you select the ideal air equipment, supported by extensive customization options for appearance and configuration. We excel in creating bespoke OEM products tailored to specific dealer requirements. Our after-sales team, composed of seasoned professionals, guarantees rapid and effective responses to all customer inquiries and needs.
At Sanzhi (Henan) Compressor Co., Ltd, our mission is to deliver high-performance, reliable products that foster enduring customer relationships. Our efficient delivery schedules, top-tier machines, and competitive pricing ensure you receive outstanding compressed air solutions every time.
Conveniently located 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 one hour. We warmly welcome 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. Strict inspection of raw materials.
2. Rigorous 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, we guarantee a swift lead time of approximately 15 working days following order confirmation. If you require custom non-standard voltage specifications, please connect with our dedicated sales team to receive a personalized delivery schedule tailored to your needs.
Q7. What's the payment term?
A: Our payment terms are straightforward and secure, designed with your convenience in mind: 30% T/T deposit upfront, 40% T/T before shipment, and the remaining 30% T/T upon receipt of the B/L copy. We accept payments in both USD and RMB.
Q8. How about your warranty?
A: We provide an industry-leading warranty, featuring one year of comprehensive coverage for the entire machine and an extended two-year warranty for the screw air compressor, excluding consumable spare parts.
Q9. What about the maintenance?
A: Initial maintenance is recommended after 500 hours of operation. Thereafter, routine maintenance intervals are suggested between 2000-3000 hours, depending on specific working conditions, to ensure the machine's optimal performance.
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).
Q11. Do you offer OEM service?
A: Yes, we offer comprehensive OEM and ODM services. Our professional design team is dedicated to providing flexible solutions that meet your specific requirements.
Q12. How long could your air compressor be used?
A: Our air compressors are engineered for exceptional durability, typically boasting a lifespan that exceeds 10 years, ensuring long-term reliability.
Q13. Will you provide some spare parts for the machines?
A: Yes, we ensure the availability of spare parts for all our machines, guaranteeing seamless operation and minimal downtime.
Q14. How about your after-sales service?
A: We offer 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 you receive the utmost satisfaction.
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