Unveil the ultimate solution tailored for your industrial demands with the Oil-Lubricated Screw Compressor from Sanzhi (Henan) Compressor Co., Ltd. As a premier supplier in China, we provide competitive factory pricing on our cutting-edge Permanent Magnet Variable Frequency Two-Stage Screw Air Compressor. This stationary powerhouse, equipped with premium centrifugal fans, guarantees unparalleled energy savings and high efficiency. Immerse yourself in superior performance and remarkable cost-effectiveness with our advanced compressor technology, engineered to elevate your operations to new heights.
Internal Structure Frontside
Internal Structure Backside
Working Principle
In the realm of ideal air compression, single-stage pressure transmission power should be equivalent to multi-stage compression power. However, various real-world factors such as transmission power loss from coupling, bearing friction, and liquid viscosity cooling effects increase the actual working power. By lowering the compression ratio for each stage, we can effectively minimize unnecessary power consumption, rendering the total power requirement for multi-stage compression lower than that of single-stage compression.
The two-stage screw air compressor features a sophisticated dual-stage rotary screw system, comprising both active and passive screws in each stage. The active screw propels the passive screw via an external power transmission device. The first stage leverages a low-pressure rate screw group, while the second stage employs a high-pressure rate screw group. Each screw is enveloped by a sealing air film, which assists in the compression process. Gas undergoes three critical stages: suction, pressurization, and exhaust.
First Stage Compression: The initial phase of the two-stage screw air compressor utilizes a low-pressure rate screw group to compress the incoming gas. Gas enters the screw compression chamber through the suction valve, and the high-speed rotation of the screw rotor ensures steady compression and transfer to the next stage.
Second Stage Compression: During the second stage, gas enters a more confined screw space where it undergoes higher temperature and pressure compression. The exhaust valve then opens, releasing the high-pressure gases seamlessly from the system.
Natural air first enters the initial compression stage via the air filter, blending with a small amount of lubricating oil inside the compression chamber. This mixture is compressed to interstage pressure. Subsequently, the compressed gas flows into the cooling channel where it is met with a significant amount of oil mist, considerably lowering the temperature. The cooled, compressed gas then advances to the second-stage rotor for further compression before ultimately being discharged at exhaust pressure. This marks the completion of 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. |
The centrifugal fan is a marvel of engineering, featuring a high-speed rotating impeller that accelerates and decelerates airflow with precision. Air enters the impeller axially, which enhances motor cooling far beyond conventional air-cooled fans. This innovation ensures seamless compressor operation and markedly extends its service life.
1) Superior Efficiency of PM Motor:The constant torque and extensive weak magnetic range of the permanent magnet motor set it apart. Its efficiency surpasses traditional motors by a remarkable 20-30%, maintaining high performance even away from the rated frequency.
2) Maintenance-Free Motor:Designed without bearings, the permanent magnet motor eradicates the costs and hassles of bearing maintenance and replacement.
3) Advanced Integrated Frequency Converter:Fitted with China's leading frequency system, this component offers an extensive speed regulation range and precision. It fine-tunes the air compressor's operation based on real-time gas demand, driving exceptional energy efficiency.
4) Zero Transmission Loss:With an embedded integrated shaft directly linking the permanent magnet motor to the compressor, it eliminates couplings and other transmission elements, ensuring flawless transmission efficiency.
5) Smooth Variable Frequency Start and Soft Start:This function significantly mitigates impact on power grid equipment, safeguarding electrical devices from damage.
6) Drastic Energy Consumption Reduction:Boasting a frequency conversion range from 25% to 100%-compared to the typical 50% to 100% range-this system outperforms fixed-speed air compressors by over 30% in energy savings. It also delivers around 5% more energy efficiency than conventional variable frequency air compressors, especially in systems with large gas consumption fluctuations.
7) Unique Two-Stage Compression Air End:Our two-stage compression screw machine features an innovative air end design, integrating first and second-stage compression rotors in a single case. Directly driven by gears, it achieves optimal linear speeds, significantly boosting compression efficiency.
8) High-Efficiency Internal Spray Curtain Cooling:Utilizing an energy-efficient internal spray curtain cooling method, this system delivers outstanding cooling. It significantly lowers the temperature of compressed air, achieving near-isothermal compression, reducing pressure loss between stages, lowering compression ratios, and enhancing compression efficiency.
9) Minimized Internal Leakage:The two-stage compression design reduces the compression ratio per stage, thereby minimizing internal leakage from high-pressure to low-pressure ends and improving volumetric efficiency.
10) Superior Noise Reduction:With a reduced compression ratio through two-stage compression, noise levels are significantly lowered, especially during unloading.
11) Effortless Maintenance and Service:Aside from the screw air end, the two-stage compressor unit retains similar systems and structures to single-stage compressors, making maintenance and service straightforward for users.
1. Unbeatable Price Advantage
We offer customers direct ex-factory prices, significantly enhancing their market competitiveness and ensuring they receive the utmost value for their investment.
2. Straightforward Direct Deals
All products are supplied directly from our factory, ensuring our clients benefit from the most cost-effective solutions available.
3. Comprehensive OEM & ODM Services
Our factory's formidable production and management capabilities enable us to provide exceptional OEM/ODM services, meticulously tailored to meet your unique needs.
4. Personalized Customization Services
We specialize in non-standard orders, export orders, and specific requirements such as voltage, power, and pressure. Reach out to us for any special demands or precise specifications.
5. Flexibility with Small Orders
Evaluate the superior quality of our products with the flexibility of placing a small trial order.
6. Rapid Delivery
We are committed to ensuring the timely delivery of high-quality products, consistently meeting your deadlines.
7. Full Authorization for Distributors
We provide complete authorization certificates for distributors, empowering you to confidently and effectively promote and sell SANZHI brand products.
Sanzhi (Henan) Compressor Co., Ltd is a pioneering leader in the manufacture of screw air compressors and screw vacuum pumps, boasting over a decade of unparalleled expertise. Our extensive product line includes normal and low-pressure screw air compressors, permanent magnet frequency conversion screw air compressors, innovative two-stage compression screw air compressors, specialized screw air compressors for laser cutting, versatile single-tank and double-tank mobile screw air compressors, electric and diesel mobile screw air compressors, and robust screw vacuum pumps. We are dedicated to delivering comprehensive solutions for all your compressed air requirements, promising reliability and innovation in every product.
Our production facilities are outfitted with cutting-edge multi-air compressor assembly lines, epitomizing lean and advanced manufacturing processes. Supported by a dedicated team of over 50 skilled employees, we continuously enhance our ERP management systems to accelerate lead times, ensuring the swift delivery of top-tier products.
Our factory has earned the prestigious ISO9001 quality management system certification. We adhere to the highest quality management standards, meticulously following rigorous quality control procedures. Each machine is subject to thorough material inspections, precise production checks, and exhaustive pre-delivery evaluations, ensuring that only products of the highest quality reach our customers.
Our customer service is unparalleled, with a pre-sales team offering expert guidance to help you select the perfect air equipment for your specific needs. We provide extensive customization options in both appearance and configuration, including the creation of unique OEM products tailored to meet specific dealer demands. Our professional sales and service team is always ready to provide prompt and efficient after-sales support, ensuring your complete satisfaction.
At Sanzhi (Henan) Compressor Co., Ltd, our commitment is to deliver superior, stable products that foster long-term relationships with our customers. Offering prompt delivery, high-quality machines, and competitive pricing, we position ourselves as your reliable partner for comprehensive compressed air solutions.
Our factory is strategically located in Xinzheng City, Henan Province, China. For your convenience, we offer complimentary pick-up services from Xinzheng International Airport, situated just 30 kilometers away, ensuring a smooth and pleasant visit to our facility. We warmly welcome you to our company and look forward to your visit!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a distinguished manufacturer specializing in screw air compressors, backed by over 10 years of industry experience.
Q2. How do you control quality?
A: 1. Rigorous inspection of raw materials.
2. Strict control of installation procedures.
3. Each machine undergoes no less than 5 hours of continuous testing before it leaves the 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 variety of voltages: 380V/50Hz/3P, 400V/50Hz/3P, 415V/50Hz/3P, 220V/60Hz/3P, 440V/60Hz/3P, and can be customized to meet your specific requirements.
Q6. How long is the delivery time?
A: For standard voltage orders, our promise is a swift 15-day turnaround following confirmation. For those requiring non-standard specifications, we invite you to consult our dedicated sales team to receive a personalized timeline tailored to your unique needs.
Q7. What's the payment term?
A: Our payment terms are designed to offer flexibility and 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: one year for the entire machine and an extended two-year warranty for the screw air compressor, with the exception of consumable spare parts.
Q9. What about the maintenance?
A: Initial maintenance is essential at 500 hours of operation. Thereafter, routine maintenance is recommended 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 meticulously engineered to excel in high-temperature conditions, boasting a working temperature range from -20°C to 45°C (-4°F to 113°F).
Q11. Do you offer OEM service?
A: Indeed, we are delighted to welcome both OEM & ODM orders. Our expert design team is fully equipped to meet your specific requirements and deliver customized solutions.
Q12. How long could your air compressor be used?
A: Our air compressors are robustly built to last over 10 years, assuring you of long-term reliability and superior performance.
Q13. Will you provide some spare parts for the machines?
A: Certainly, we ensure the seamless operation of your machines by providing essential spare parts.
Q14. How about your after-sales service?
A: Our after-sales service is comprehensive and customer-focused. We offer online instructions for installation and commissioning, and our engineers are available to assist with training and on-site setup to ensure everything runs smoothly.
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