Discover the ultimate solution for your industrial needs with the Oil-Lubricated Screw Compressor from Sanzhi (Henan) Compressor Co., Ltd. As a leading supplier in China, we proudly offer unbeatable factory pricing on our advanced Permanent Magnet Variable Frequency Two-Stage Screw Air Compressor. This cutting-edge, stationary system is fitted with premium centrifugal fans, guaranteeing exceptional energy savings and unparalleled efficiency. Elevate your operations with superior performance and unmatched cost-effectiveness, courtesy of our state-of-the-art compressor technology.
Internal Structure Frontside
Internal Structure Backside
Working Principle
In an ideal air compression process, the power needed for single-stage pressure transmission is equal to the cumulative power required for multi-stage compression. However, due to practical factors like transmission power loss from couplings, bearing friction, and the cooling effect of liquid viscosity, the actual working power tends to be higher. By diminishing the compression ratio for each stage, we can significantly reduce wasted power, resulting in the total power required for multi-stage compression being less than that of single-stage compression.
The Energy Efficient Two-Stage Screw Compressor from Sanzhi (Henan) Compressor Co., Ltd. boasts a sophisticated two-stage rotary screw compressor system. Each stage comprises an active and a passive screw, where the active screw drives the passive screw via an external power transmission device. The first stage leverages a low-pressure rate screw group, while the second stage utilizes a high-pressure rate screw group. Each screw is enveloped by a sealing air film, facilitating the compression process through three primary stages: suction, pressurization, and exhaust.
First Stage Compression: The initial phase of the two-stage screw air compressor employs a low-pressure rate screw group to compress the gas. The gas is drawn into the screw compression chamber through the suction valve. As the screw rotor spins at high speed, the gas is steadily compressed and then transferred to the second stage.
Second Stage Compression: In this phase, gas enters a more confined screw space within the high-pressure rate screw group, where it experiences further compression at higher temperatures and pressures. The exhaust valve then opens, releasing the high-pressure gases from the system.
Natural air is drawn into the first stage of compression through an air filter, where it mixes with a small amount of lubricating oil in the compression chamber. This blend of gas and oil is compressed to interstage pressure. The compressed gas then passes through a cooling channel, encountering a substantial amount of oil mist that significantly reduces its temperature. The cooled, compressed gas moves into the second-stage rotor for two-stage compression and is finally compressed to exhaust pressure. The entire cycle culminates with the discharge of gas via the exhaust valve.
| 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. |
The centrifugal fan is masterfully engineered with a high-speed rotating impeller that accelerates and decelerates the airflow. As air enters the impeller from the axial direction, it leads to an accelerated reduction in motor temperature compared to standard air-cooled fans. This feature ensures continuous compressor operation and significantly prolongs the compressor's service life.
1) High efficiency of PM motor:The constant torque and broad weak magnetic range set this motor apart. The permanent magnet motor's efficiency exceeds that of conventional motors by a remarkable 20-30%. It maintains consistently high efficiency even when operating away from the rated frequency.
2) Motor maintenance-free:The permanent magnet motor is innovatively designed without bearings, thereby eliminating the costs and efforts associated with bearing maintenance and replacement.
3) Integrated frequency converter:Equipped with China's leading frequency system, this converter offers an extensive speed regulation range and high precision. It dynamically adjusts the air compressor's operation based on actual gas demand, delivering unparalleled energy-saving performance.
4) No transmission loss:Featuring an embedded integrated shaft directly connected structure between the permanent magnet motor and the compressor, this design eradicates couplings and other transmission components, ensuring 100% transmission efficiency.
5) Variable frequency start and soft start:This feature greatly reduces the impact on power grid equipment, protecting electrical devices from potential damage.
6) Reduce energy consumption:With a frequency conversion range from 25% to 100% (in contrast to the 50% to 100% range of ordinary frequency converters), this system achieves energy savings of over 30% compared to fixed-speed air compressors. Compared to regular variable frequency air compressors, the energy-saving is around 5%, which is even more significant with substantial system gas consumption fluctuations.
7) Two-stage compression unique air end:The two-stage compression screw machine features a unique air end design, integrating first-stage and second-stage compression rotors within a single case. Each rotor is directly driven by gears to achieve optimal linear speeds, thereby enhancing compression efficiency.
8) Internal spray curtain cooling method:Utilizes a high energy-saving internal spray curtain cooling method, delivering superior cooling effects. This method significantly lowers the temperature of the compressed air, achieving near-isothermal compression, reducing pressure loss between stages, lowering compression ratios, and boosting overall compression efficiency.
9) Reduce internal leakage:The two-stage compression design lowers the compression ratio for each stage, reducing internal leakage from high-pressure to low-pressure ends, thereby improving volume efficiency.
10) Noise reduction:With two-stage compression, the compression ratio is reduced, substantially lowering noise levels, especially during unloading operations.
11) Easy maintenance and service:The two-stage compressor unit, aside from the screw air end, retains similar systems and structures to single-stage compressors, making user maintenance and service straightforward and convenient.
1. Unbeatable Price Advantage
We offer our customers direct ex-factory prices that significantly enhance their market competitiveness. This ensures that they receive the best value for their investment, making our products not just affordable, but strategically advantageous.
2. Straightforward Direct Deals
All our products are supplied directly from the factory. This guarantees more cost-effective solutions for our clients by eliminating middlemen and ensuring direct access to our top-quality products.
3. Comprehensive OEM & ODM Services
Our factory boasts formidable production and management capabilities, allowing us to provide exceptional OEM/ODM services. We tailor our offerings to precisely meet your needs, ensuring product excellence and customization.
4. Personalized Customization Services
We specialize in catering to non-standard orders, export orders, and specific requirements such as voltage, power, and pressure. For any special demands, please contact us and we will provide a tailored solution to meet your exact specifications.
5. Flexibility with Small Orders
We welcome small trial orders, allowing you to evaluate the superior quality of our products before committing to larger quantities. This flexibility helps you make informed decisions with confidence.
6. Rapid Delivery
We are committed to ensuring the timely delivery of high-quality products. Our efficient logistics and streamlined processes guarantee that we meet your deadlines consistently, so you can rely on us for prompt service.
7. Full Authorization for Distributors
We provide complete authorization certificates for our distributors. This empowers you to confidently sell SANZHI brand products, ensuring that you have the full backing and legitimacy to represent our esteemed brand.
Sanzhi (Henan) Compressor Co., Ltd is a distinguished leader in the manufacturing sector with over ten years of expertise in crafting high-performance screw air compressors and vacuum pumps. Our expansive product lineup includes normal and low-pressure screw air compressors, energy-efficient permanent magnet frequency conversion compressors, advanced two-stage compression compressors, specialized models for laser cutting, versatile single-tank and double-tank mobile compressors, both electric and diesel variants, and state-of-the-art screw vacuum pumps. We are steadfast in delivering holistic solutions tailored to meet all your compressed air requirements.
Our cutting-edge production facilities boast modern multi-air compressor assembly lines, ensuring streamlined and efficient manufacturing processes. With a dedicated workforce of over 50 skilled employees, we continuously refine our ERP management systems to accelerate lead times and guarantee the prompt delivery of top-tier products.
Our factory proudly upholds the ISO9001 quality management system certification. We adhere to rigorous quality management protocols, meticulously following standard quality control procedures. Every machine is subject to thorough material inspections, precise production checks, and exhaustive pre-delivery evaluations, ensuring unparalleled quality.
In the domain of customer service, our pre-sales team offers expert advice to help choose the ideal air equipment for diverse facilities. We provide extensive customization options in both appearance and configuration and can design unique OEM products to cater to specific dealer needs. Our seasoned sales and service team is always ready to deliver swift and effective after-sales support.
At Sanzhi (Henan) Compressor Co., Ltd, our commitment is to provide superior, reliable products to foster long-term relationships with our clients. With our promise of prompt delivery, high-quality machines, and competitive pricing, we stand as your trustworthy partner for all-encompassing compressed air solutions.
Our factory is strategically located in Xinzheng City, Henan Province, China. To ensure a hassle-free visit, we offer complimentary pick-up from the nearby Xinzheng International Airport, just 30 kilometers away. We warmly welcome you to experience our facilities firsthand!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a dedicated manufacturer specializing in screw air compressors, proudly offering over a decade of industry experience.
Q2. How do you control quality?
A: 1. Thorough inspection of raw materials.
2. Strict oversight of installation processes.
3. Each machine undergoes a minimum of 5 hours of continuous testing before it leaves our factory.
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 of your country (V/Hz)
4. Need for additional accessories such as an air tank, filters, and/or air dryers.
Provide us this information, and we will craft a tailored 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 compressors are available in a range of voltages: 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, 440v/60hz/3p, with customization options to meet your specific needs.
Q6. How long is the delivery time?
A: For standard voltage orders, you can expect a swift and efficient 15-day turnaround once your order is confirmed. For orders requiring non-standard specifications, please contact our dedicated sales team, who will provide you with a customized timeline tailored to your specific needs.
Q7. What's the payment term?
A: Our flexible payment terms are designed to suit your convenience: 30% T/T upfront, 40% T/T before shipment, and the remaining 30% T/T upon presentation of the B/L copy. We accept payments in both USD and RMB.
Q8. How about your warranty?
A: We are proud to offer a comprehensive warranty package: one year for the entire machine and an extended two-year warranty specifically for the screw air compressor, excluding consumable spare parts.
Q9. What about the maintenance?
A: Initial maintenance is essential at 500 hours. Following that, routine maintenance should be scheduled every 2000-3000 hours, depending on the specific operating environment to ensure optimal performance.
Q10. Can machines be run in high-temperature environments?
A: Absolutely, our machines are expertly engineered to perform efficiently in high-temperature conditions, with a robust working temperature range from -20°C to 45°C (-4°F to 113°F).
Q11. Do you offer OEM service?
A: Indeed, we proudly offer both OEM & ODM services. Our expert design team is ready to meet your unique specifications and requirements.
Q12. How long could your air compressor be used?
A: Our air compressors are meticulously built to last over 10 years, ensuring long-term reliability and consistent performance.
Q13. Will you provide some spare parts for the machines?
A: Certainly, we supply essential spare parts to guarantee the seamless and uninterrupted operation of your machines.
Q14. How about your after-sales service?
A: We offer an exceptional after-sales support package, which includes comprehensive online instructions for installation and commissioning. Additionally, we can arrange for our skilled engineers to assist with training and on-site setup, ensuring a smooth and efficient experience.
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