Introducing the revolutionary Low-Pressure Twin-Stage Compression Permanent Magnet Variable Frequency Electric Drive Screw Compressor from Sanzhi (Henan) Compressor Co., Ltd.! Meticulously engineered for demanding industrial applications, this cutting-edge Twin-Screw Air Compressor sets the standard for value and performance. Available in a comprehensive range of power options, including 37KW, 45KW, 55KW, 75KW, 90KW, 110KW, 132KW, 160KW, 185KW, 200KW, and 250KW, this energy-efficient powerhouse guarantees both exceptional efficiency and unwavering reliability. Opt for our top-rated compressor to experience peerless quality at an incredibly competitive price.
Meticulously Crafted Internal Structure - Frontside
Intricately Designed Internal Structure - Backside
Advanced Working Principle
In the world of air compression, the ideal is for the power required for single-stage transmission to match the combined power of multi-stage compression. However, real-world factors such as coupling power losses, bearing friction, and the cooling effect of liquid viscosity introduce inefficiencies. By strategically reducing the compression ratio per stage, these inefficiencies are minimized, resulting in a more efficient and lower total power demand for multi-stage compression compared to single-stage compression.
Our state-of-the-art two-stage screw air compressor boasts an innovative dual-stage rotary screw system. Each stage includes both an active and a passive screw. The active screw, powered by an external mechanism, drives the passive screw. The first stage features a low-pressure screw group, while the second houses a high-pressure screw group. A sealing air film encases each screw, ensuring optimal compression. As the screws rotate, they adeptly handle the gas through three phases: suction, pressurization, and discharge.
First Stage Compression: Initially, the gas is compressed by the low-pressure screw group. The gas enters the screw compression chamber through the suction valve and undergoes gradual compression, driven by high-speed screw rotors. This process directs the gas towards the secondary compression stage with enhanced efficiency.
Second Stage Compression: In this phase, the gas is compressed within a more confined screw space, which results in higher temperatures and pressures. This stage concludes with the opening of the exhaust valve, efficiently expelling the high-pressure gas from the system.
Natural air, purified through an air filter, enters the first compression stage where it mixes with a small amount of lubricating oil in the compression chamber. This mixture is compressed to an intermediate pressure. As the compressed gas passes through the cooling channel, it encounters significant oil mist, which greatly reduces its temperature. This cooled, compressed gas then undergoes further compression in the second stage rotor, reaching the final exhaust pressure and is ultimately expelled through the exhaust valve, completing the highly efficient compression process.
1) Superior Efficiency of PM Motor:Our state-of-the-art permanent magnet motor is engineered to deliver exceptional performance. With an expansive constant torque and weak magnetic range, it achieves a remarkable 20-30% higher efficiency compared to standard motors. It ensures peak efficiency across a wide range of frequencies, providing consistent and top-tier performance.
2) Maintenance-Free Motor Design:Designed with innovation in mind, our permanent magnet motor is free from internal bearings, eliminating the need for costly bearing maintenance and replacements. Enjoy a hassle-free experience with our maintenance-free motor design.
3) Advanced Integrated Frequency Converter: Our compressor features China's premier frequency system, offering precise and extensive speed regulation. It adjusts fluidly to actual gas demand, optimizing energy conservation while maximizing efficiency.
4) Elimination of Transmission Loss: Thanks to our cutting-edge integrated shaft design, the permanent magnet motor is directly connected to the compressor. This innovative, compact structure-free of couplings and other transmission parts-ensures 100% transmission efficiency.
5) Variable Frequency and Soft Start Capabilities:Our advanced variable frequency and soft start features significantly reduce the impact on power grid equipment, protecting electrical components from potential damage and enhancing system durability.
6) Enhanced Energy Efficiency: Boasting a frequency conversion range from 25% to 100% (versus the typical 50% to 100%), our system delivers over 30% energy savings compared to fixed-speed compressors. It also outperforms standard variable frequency compressors by around 5%, with even greater savings under varying gas consumption conditions.
7) Unique Two-Stage Compression Air End:Our innovative two-stage compression screw machine integrates both the first and second-stage rotors within a single casing. Driven directly by gears, each rotor achieves optimal linear speed, significantly enhancing compression efficiency.
8) Innovative Internal Spray Curtain Cooling:Our high-efficiency internal spray curtain cooling method dramatically reduces compressed air temperatures through near-isothermal compression, minimizing pressure loss and boosting overall efficiency.
9) Minimized Internal Leakage:Utilizing a two-stage compression process, we significantly reduce the compression ratio for each stage, minimizing internal leakage from high to low-pressure ends. This improvement leads to enhanced volume efficiency.
10) Significant Noise Reduction:Our two-stage compression process effectively lowers the compression ratio, substantially decreasing operational noise, especially during unloading phases, for a quieter working environment.
11) Effortless Maintenance and Service:The two-stage compressor unit shares similar systems and structures with single-stage units, aside from the screw air end, simplifying maintenance and ensuring ease of use for all users.
| 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 Price Advantage
By eliminating the middleman, we provide industry-leading ex-factory prices. This ensures you, our valued customer, gain a significant market edge with our competitively priced, premium-grade compressors.
2. Direct Transactions
Experience the unparalleled reliability of factory-direct products, guaranteeing superior quality and cost-efficiency for all your air compression needs.
3. Tailored OEM & ODM Services
Leverage our factory's exceptional production and management capabilities to access customized OEM/ODM services that perfectly align with your specific requirements.
4. Bespoke Customization Services
We welcome orders for non-standard and export specifications, accommodating a variety of voltage, power, and pressure needs. Reach out to us to fulfill your precise demands.
5. Small Order Acceptance
Assess the superior performance of our products with a small trial order, ensuring they meet and surpass your highest quality expectations.
6. Swift Delivery
Receive top-tier products with our commitment to timely and reliable delivery, ensuring your operational efficiency remains uninterrupted.
7. Comprehensive Authorization
Bolster your sales strategy with our full authorization certificates, giving you the assurance and confidence to effectively represent and sell SANZHI brand products.
Sanzhi (Henan) Compressor Co., Ltd. is a distinguished leader in the design and manufacture of premium screw air compressors and vacuum pumps, boasting over a decade of industry mastery. Our extensive product line includes normal and low-pressure screw air compressors, permanent magnet frequency conversion screw air compressors, twin-stage compression screw air compressors, specialized models for laser cutting, versatile single-tank and double-tank mobile screw air compressors (both electric and diesel-powered), and screw vacuum pumps. Experience our exceptional engineering with a product range designed to meet diverse industrial needs.
Our production capabilities are bolstered by state-of-the-art, lean multi-air compressor assembly lines that ensure unparalleled efficiency. Our team of over 50 professionals continuously enhances our management systems, including ERP, to minimize lead times and ensure the rapid delivery of superior products.
Our dedication to quality is evidenced by our ISO9001 certification. We adhere to strict quality management standards and implement rigorous quality control measures. Every machine undergoes thorough material, production, and pre-delivery inspections to ensure the highest quality standards.
We pride ourselves on exceptional customer service that starts with expert pre-sales guidance, ensuring clients select the ideal air equipment tailored to their facilities, with high customization options in appearance and configuration. We specialize in OEM solutions for unique dealer requirements. Our after-sales team, composed of skilled sales and service professionals, guarantees quick and efficient responses to all customer inquiries and needs.
At Sanzhi (Henan) Compressor Co., Ltd., our commitment to delivering reliable and superior products is unwavering. We focus on building enduring relationships with our customers through efficient delivery, high-quality machines, and competitive pricing. Depend on us for exceptional compressed air solutions that meet your every need.
Located in Xinzheng City, Henan Province, China, our factory is conveniently accessible. We provide complimentary pick-up services from Xinzheng International Airport, just 30 kilometers away-about a one-hour journey to our facility. We warmly welcome you to visit us and witness our operations firsthand!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a seasoned manufacturer of screw air compressors, with over a decade of experience in the industry.
Q2. How do you control quality?
A: 1. Rigorous inspection of raw materials.
2. Stringent control of installation procedures.
3. Each machine undergoes a minimum of 5 hours of continuous testing before dispatch to ensure optimal performance.
Q3. What information must I provide to get the suitable machine?
1. Required air delivery capacity (Unit: CFM or m³/Min)
2. Desired working pressure (Unit: PSI, Bar, or Mpa)
3. Voltage and frequency specifications of your country (V/Hz)
4. Any additional accessories needed, such as air tanks, filters, or air dryers.
Provide this information, and we will engineer the perfect solution tailored for you!
Q4. What is the general unit conversion?
1 Bar = 0.1 Mpa = 14.5 PSI
1 m³/min = 35.32 cfm
1 KW = 1.34 HP
Q5. What is the available voltage air compressor?
A: Sanzhi offers a comprehensive range of voltage options including 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, and 440v/60hz/3p, with customization available to meet your specific requirements.
Q6. How long is the delivery time?
A: For our standard voltage models, enjoy the benefit of expedited delivery within just 15 working days from order confirmation. For non-standard models, please feel free to contact our dedicated and knowledgeable sales team for personalized assistance.
Q7. What's the payment term?
A: Secure your order with a 30% T/T deposit, followed by a 40% T/T payment before shipment. The remaining 30% T/T is due upon presentation of the B/L copy. We are pleased to accept payments in both USD and RMB for your utmost convenience.
Q8. How about your warranty?
A: Enjoy unmatched peace of mind with our comprehensive warranty: 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: The first maintenance is required after 500 hours of operation, with regular maintenance every 2000-3000 hours thereafter. Always consider the actual working environment to optimize performance.
Q10. Can machines be run in high-temperature environments?
A: Absolutely, our machines are meticulously engineered to perform efficiently in high-temperature environments, with a robust working temperature range from -20° to 45° (-4ºF to 113ºF).
Q11. Do you offer OEM service?
A: Yes, we are proud to offer both OEM and ODM services, supported by our professional design team. Bring your innovative ideas to life with our expertise.
Q12. How long could your air compressor be used?
A: Typically, our air compressors boast an impressive lifespan exceeding 10 years, ensuring long-term reliability and performance.
Q13. Will you provide some spare parts for the machines?
A: Certainly, we provide essential spare parts to ensure the seamless and uninterrupted operation of your machines.
Q14. How about your after-sales service?
A: We offer comprehensive after-sales support, including detailed online installation and commissioning instructions. Additionally, our engineers are available for on-site training and installation assistance to ensure optimal performance.
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