Discover the pinnacle of industrial efficiency with the Oil-Lubricated Screw Compressor, exclusively from Sanzhi (Henan) Compressor Co., Ltd. As a forefront leader in China's compressor industry, we present an unbeatable factory pricing on our cutting-edge Permanent Magnet Variable Frequency Two-Stage Screw Air Compressor. Featuring premium centrifugal fans, this stationary marvel guarantees unmatched energy savings and outstanding efficiency. Elevate your operational performance and enjoy unprecedented cost-effectiveness with our advanced compressor technology.
Internal Structure Frontside
Internal Structure Backside
Working Principle
In an ideal air compression process, the power required for single-stage pressure transmission equals the sum of the power required for multi-stage compression. However, in reality, the actual working power increases due to various factors such as transmission power loss from the coupling, bearing friction, and the cooling effect of liquid viscosity. Consequently, by reducing the compression ratio for each stage, we can minimize useless power, making the total power required for multi-stage compression less than that for single-stage compression.
The two-stage screw air compressor features 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 initial stage employs a low-pressure screw group, while the subsequent stage utilizes a high-pressure screw group. A sealing air film envelops each screw, enhancing the compression process. Gas compression occurs through three pivotal stages: suction, pressurization, and exhaust.
First Stage Compression: In the initial phase of the two-stage screw air compressor, a low-pressure screw group compresses the gas. The gas enters the screw compression chamber via the suction valve. Through the high-speed rotation of the screw rotor, the gas is steadily compressed and directed to the next stage.
Second Stage Compression: During the second phase, the 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 from the system.
Natural air first enters the initial compression stage through an air filter, mixing with a small amount of lubricating oil within the compression chamber. This mixture is compressed to interstage pressure. The compressed gas then flows into the cooling channel, encountering substantial oil mist, which significantly reduces its temperature. Following this cooling process, the gas proceeds to the second-stage rotor for further compression. Finally, the gas reaches the exhaust pressure and is discharged through the exhaust valve, concluding the 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 masterfully designed with a high-speed rotating impeller that both accelerates and decelerates airflow efficiently. As air enters the impeller from the axial direction, it significantly enhances motor temperature reduction over conventional air-cooled fans. This superior design ensures continuous compressor operation, substantially prolonging the compressor's service life.
1) Exceptional PM motor efficiency:The permanent magnet motor's efficiency outperforms regular motors by an impressive 20-30%, offering a broader constant torque and weak magnetic range. It consistently maintains high efficiency even when operating away from the rated frequency, ensuring superior performance.
2) Zero motor maintenance:Designed without bearings, the permanent magnet motor eliminates the costs and hassle of bearing maintenance and replacement, ensuring uninterrupted operation.
3) Advanced integrated frequency converter:Featuring China's leading frequency system, this compressor provides an extensive speed regulation range with high precision. It fine-tunes the air compressor's operation according to actual gas demand, delivering exceptional energy-saving performance.
4) Absolute transmission efficiency:With a direct connection between the permanent magnet motor and the compressor, this innovative design eliminates couplings and other transmission components, guaranteeing 100% transmission efficiency.
5) Smooth variable frequency and soft start:The variable frequency start and soft start features significantly mitigate the impact on power grid equipment, protecting electrical devices from potential damage.
6) Outstanding energy efficiency:Unlike ordinary frequency converters with a range from 50% to 100%, this system offers a frequency conversion range from 25% to 100%, leading to remarkable energy savings of over 30% compared to fixed-speed air compressors. Additionally, it offers around 5% more energy-saving compared to regular variable frequency air compressors, especially with substantial system gas consumption fluctuations.
7) Unique two-stage compression 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. Driven directly by gears, this design achieves optimal linear speeds, thereby enhancing compression efficiency.
8) High-efficiency internal spray curtain cooling:Utilizing a high energy-saving internal spray curtain cooling method, this system delivers exceptional cooling effects, significantly lowering compressed air temperature. Achieving near-isothermal compression, it reduces pressure loss between stages, lowers compression ratios, and boosts overall compression efficiency.
9) Minimized internal leakage:The two-stage compression design reduces the compression ratio for each stage, effectively minimizing internal leakage from high-pressure to low-pressure ends, thus improving volume efficiency.
10) Significant noise reduction:By reducing the compression ratio, the two-stage compression substantially lowers noise levels, particularly during unloading, ensuring a quieter operation environment.
11) Simplified maintenance and service:The two-stage compressor unit, aside from its advanced screw air end, retains similar systems and structures to single-stage compressors, making user maintenance and service straightforward and hassle-free.
1. Unmatched Price Edge
We offer customers direct ex-factory prices, significantly enhancing their market competitiveness and ensuring they receive unparalleled value.
2. Seamless Direct Transactions
All products are supplied directly from our factory, guaranteeing more cost-effective solutions for our esteemed clients.
3. Extensive OEM & ODM Services
Our factory boasts formidable production and management capabilities, enabling us to deliver exceptional OEM/ODM services tailored precisely to your requirements.
4. Customized Personalization Services
We adeptly handle non-standard orders, export orders, and special requirements such as specific voltage, power, and pressure. Connect with us for any unique demands.
5. Flexibility with Small Orders
Feel free to place a small trial order to experience firsthand the superior quality of our exceptional products.
6. Swift Delivery
We guarantee the consistent and timely delivery of high-quality products, ensuring your deadlines are always met.
7. Comprehensive Authorization for Distributors
We provide complete authorization certificates for distributors, empowering you to confidently and effectively sell SANZHI brand products.
Sanzhi (Henan) Compressor Co., Ltd is a premier manufacturer with over a decade of expertise in producing high-quality screw air compressors and screw vacuum pumps. Our extensive product lineup includes normal pressure and low-pressure screw air compressors, permanent magnet frequency conversion screw air compressors, two-stage compression screw air compressors, screw air compressors for laser cutting, single-tank and double-tank mobile screw air compressors, as well as electric and diesel mobile screw air compressors, and screw vacuum pumps. We are committed to delivering comprehensive, cutting-edge solutions that cater to all your compressed air needs.
Our cutting-edge production facilities boast state-of-the-art multi-air compressor assembly lines, ensuring modern and efficient manufacturing processes. With a dedicated and skilled team of over 50 employees, we continually optimize our ERP management systems to expedite lead times and guarantee the rapid delivery of superior products.
Our factory is certified under the ISO9001 quality management system, adhering to the highest quality management protocols. We rigorously follow standard quality control procedures, with each machine undergoing meticulous material inspections, production checks, and pre-delivery evaluations to ensure the highest levels of quality.
In the domain of customer service, our expert pre-sales team provides professional guidance in selecting the ideal air equipment for various facilities. We offer extensive customization options in both appearance and configuration, and can manufacture unique OEM products to meet specific dealer requirements. Our professional sales and service team is always ready to provide quick and efficient after-sales support.
At Sanzhi (Henan) Compressor Co., Ltd, we are dedicated to delivering superior and dependable products, fostering long-term relationships with our customers. We offer efficient delivery, high-quality machines, and competitive pricing, making us your trusted partner for comprehensive compressed air solutions.
Our factory is strategically located in Xinzheng City, Henan Province, China. For your convenience, we provide complimentary pick-up services from Xinzheng International Airport, just 30 kilometers away, ensuring a seamless visit to our facility. We warmly welcome you to experience our hospitality and expertise!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a professional manufacturer specializing in screw air compressors with 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 various 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, expect a rapid 15-day turnaround post-confirmation. For orders with non-standard specifications, kindly contact our dedicated sales team to receive a custom timeline tailored to your needs.
Q7. What's the payment term?
A: Our flexible payment terms include a 30% T/T deposit, 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 provide a comprehensive warranty: one year for the entire machine and an extended two-year warranty specifically for the screw air compressor, excluding consumable parts.
Q9. What about the maintenance?
A: The initial maintenance is required at 500 hours. Subsequently, routine maintenance is recommended every 2000 to 3000 hours, depending on the specific operating environment.
Q10. Can machines be run in high-temperature environments?
A: Absolutely. Our machines are engineered to perform efficiently in high-temperature conditions, with a working temperature range from -20°C to 45°C (-4°F to 113°F).
Q11. Do you offer OEM service?
A: Indeed, we welcome both OEM and ODM orders, supported by our expert design team to meet your precise requirements.
Q12. How long could your air compressor be used?
A: Generally, our air compressors are built to last over 10 years, ensuring long-term reliability and exceptional performance.
Q13. Will you provide some spare parts for the machines?
A: Certainly, we provide essential spare parts to ensure the seamless and continuous operation of your machines.
Q14. How about your after-sales service?
A: We offer exhaustive after-sales support, including online installation and commissioning instructions. Additionally, our engineers are available to assist with training and on-site setup when required.
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