Introducing the groundbreaking Low-Pressure Twin-Stage Compression Permanent Magnet Variable Frequency Electric Drive Screw Compressor from Sanzhi (Henan) Compressor Co., Ltd.! Engineered with unrivaled precision for industrial applications, this state-of-the-art Twin-Screw Air Compressor delivers unmatched value and superior performance. Available in an extensive range of power options, including 37KW, 45KW, 55KW, 75KW, 90KW, 110KW, 132KW, 160KW, 185KW, 200KW, and 250KW, this energy-efficient marvel ensures both efficiency and reliability. Choose our top-rated compressor to experience unparalleled quality at an exceptionally competitive price.
Meticulously Crafted Internal Structure - Frontside
Intricately Designed Internal Structure - Backside
Advanced Working Principle
In the ideal world of air compression, the power for single-stage transmission equals the cumulative power for multi-stage compression. Yet, real-world conditions introduce inefficiencies like coupling power losses, bearing friction, and the cooling effect of liquid viscosity. By judiciously minimizing the compression ratio per stage, these inefficiencies are significantly reduced, leading to a more efficient and lower total power demand for multi-stage compression compared to single-stage compression.
Our cutting-edge two-stage screw air compressor features an advanced dual-stage rotary screw system. Each stage has an active and a passive screw. The active screw, driven by an external power mechanism, propels the passive one. The first stage houses a low-pressure screw group, while the second stage incorporates a high-pressure screw group. Surrounding each screw is a sealing air film that ensures optimal compression. As the screws rotate, they expertly manage the gas through three distinct phases: suction, pressurization, and discharge.
First Stage Compression: Initially, the gas is compressed by the low-pressure screw group. As it enters the screw compression chamber through the suction valve, the gas undergoes gradual compression, driven by the high-speed screw rotors. This process directs the gas towards the secondary compression stage with enhanced efficiency.
Second Stage Compression: In this stage, the gas is compressed within a more constrained screw space, experiencing higher temperatures and pressures. This phase concludes with the opening of the exhaust valve, allowing the high-pressure gas to be efficiently expelled 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, greatly reducing 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 permanent magnet motor boasts an expansive constant torque and weak magnetic range, achieving a phenomenal 20-30% higher efficiency than standard motors. It maintains peak efficiency across all frequencies, guaranteeing consistent top-tier performance.
2) Maintenance-Free Motor Design:Ingeniously crafted without internal bearings, our permanent magnet motor eliminates the need for costly bearing maintenance and replacements, ensuring a hassle-free experience.
3) Advanced Integrated Frequency Converter: Equipped with China's leading frequency system, this converter offers precise, broad speed regulation. It adjusts seamlessly to actual gas demand, optimizing energy conservation and maximizing efficiency.
4) Elimination of Transmission Loss: Our cutting-edge integrated shaft design directly links the permanent magnet motor to the compressor. This compact structure, devoid of couplings and other transmission parts, guarantees 100% transmission efficiency.
5) Variable Frequency and Soft Start Capabilities:These advanced features dramatically reduce the impact on power grid equipment, safeguarding electrical components from potential damage.
6) Enhanced Energy Efficiency: With a frequency conversion range spanning from 25% to 100% (versus the typical 50% to 100%), our system achieves over 30% energy savings compared to fixed-speed compressors. It also surpasses standard variable frequency compressors by roughly 5%, with even greater savings under fluctuating gas consumption conditions.
7) Unique Two-Stage Compression Air End:Our two-stage compression screw machine integrates the first and second-stage rotors within a single case. Driven directly by gears, each rotor attains optimal linear speed, significantly enhancing compression efficiency.
8) Innovative Internal Spray Curtain Cooling:This high-efficiency cooling method dramatically lowers compressed air temperatures through near-isothermal compression, minimizing pressure loss and boosting overall efficiency.
9) Minimized Internal Leakage:By employing two-stage compression, we reduce the compression ratio for each stage, which minimizes internal leakage from high to low-pressure ends, thereby improving volume efficiency.
10) Significant Noise Reduction:The two-stage compression process lowers the compression ratio, substantially decreasing operational noise, particularly during unloading phases.
11) Effortless Maintenance and Service:Apart from the screw air end, the two-stage compressor unit's systems and structures are akin to single-stage units, simplifying maintenance and ensuring ease of use for 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 offer industry-leading ex-factory prices. This guarantees you gain a substantial market edge with our competitively priced, premium compressors.
2. Direct Transactions
Experience the reliability of factory-direct products, ensuring superior quality and cost-efficiency for all your air compression needs.
3. Tailored OEM & ODM Services
Leverage our factory's outstanding production and management capabilities to receive customized OEM/ODM services that perfectly match your unique requirements.
4. Bespoke Customization Services
We welcome orders for non-standard and export specifications, accommodating various voltage, power, and pressure needs. Connect with us to fulfill your specific demands.
5. Small Order Acceptance
Evaluate the superior performance of our products with a small trial order, ensuring they meet and surpass your quality expectations.
6. Swift Delivery
Receive top-tier products with a commitment to timely and dependable delivery, ensuring your operational efficiency.
7. Comprehensive Authorization
Enhance your sales strategy with our full authorization certificates, giving you the 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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