Introducing the revolutionary Low-Pressure Compressor by Sanzhi (Henan) Compressor Co., Ltd.! This cutting-edge Two-Stage Compression Permanent Magnet Variable Frequency Drive Screw Air Compressor is meticulously crafted to redefine industrial excellence. Available in a comprehensive array of power options, including 15KW, 22KW, 30KW, 37KW, 45KW, 55KW, 75KW, 90KW, 110KW, 132KW, 160KW, 185KW, 200KW, and 250KW, this versatile powerhouse offers unparalleled efficiency and steadfast reliability. Elevate your operations with this state-of-the-art solution, expertly engineered to fulfill the diverse and demanding needs of today's ever-evolving industries.
Detailed Internal Structure - Frontside
Detailed Internal Structure - Backside
Innovative Working Principle
In an ideal air compression scenario, the energy required for a single-stage pressure transfer matches the total energy for multi-stage compression. However, practical challenges such as coupling power losses, bearing friction, and cooling due to fluid viscosity demand more operational power. By optimizing the compression ratio per stage, these inefficiencies are substantially reduced. As a result, the total power consumption for multi-stage compression is significantly lower than that of single-stage compression.
Our cutting-edge two-stage screw air compressor is equipped with an intricately designed twin-stage rotary screw mechanism. This groundbreaking system features an active screw in each stage that drives a passive screw through a durable external power transmission system. The first stage incorporates a low-pressure screw group, while the second stage enhances compression with a high-pressure screw group. Each screw is surrounded by a precisely engineered sealing air film. As the compressor operates, the gas undergoes a sophisticated tri-phase process-suction, pressurization, and exhaust-delivering exceptional compression efficiency.
First Stage Compression: At the initial phase of our advanced two-stage screw air compressor, gas is expertly compressed using a low-pressure screw group. The gas is drawn into the compression chamber through the suction valve, where the swift rotation of the screw rotor compresses it before seamlessly transferring it to the second stage.
Second Stage Compression: In the subsequent stage, the gas is subjected to further compression within a more constricted screw space, resulting in elevated temperatures and pressures. The process reaches its peak as the exhaust valve opens, liberating the high-pressure gases from the system and concluding the compression cycle.
Natural air is initially guided through the air filter into the first compression stage, where it combines with a small amount of lubricating oil. This mixture is compressed to an intermediate pressure level. Following this, the gas transitions into a cooling channel, where it interacts with a substantial oil mist, significantly reducing its temperature. The cooled, compressed gas subsequently proceeds to the second-stage rotor for its final compression to the maximum exhaust pressure. Finally, the fully compressed gas exits the system through the exhaust valve, marking the completion of the compression cycle.
1) High efficiency of PM motor:Experience the pinnacle of efficiency with our cutting-edge permanent magnet motor! Enjoy a substantial 20-30% efficiency surge beyond conventional motors. Its wide constant torque and weak magnetic ranges mean it never falters, delivering high-efficiency performance even off the rated frequency. Elevate your operational standards with this power-packed motor.
2) Two-stage compression unique air end:Introducing an innovation in compression technology-our two-stage compression screw machine. The unique design integrates first and second-stage compression rotors within a single casing, driven directly by gears. This ingenious setup allows each rotor to reach optimal linear speeds, dramatically boosting compression efficiency for unparalleled performance.
3) Integrated frequency converter: Equipped with the leading frequency system of China, our air compressor excels in speed regulation and precision. Users can customize the frequency according to real-time gas demands, unlocking impressive energy savings and superior operational efficiency with every use.
4) Reduce internal leakage:Our advanced two-stage compression technology strategically lowers the compression ratio for each stage, minimizing internal leakage from high to low-pressure ends. This innovation significantly enhances volumetric efficiency, setting new standards in compressor performance.
5) Variable frequency start and the soft startof the motor are meticulously engineered to reduce the impact on power grid equipment. This protective feature prevents damage to electrical components, ensuring longevity and stability.
6) Reduce energy consumption: Our state-of-the-art frequency conversion system spans a remarkable 25% to 100% operational range, far surpassing the standard 50% to 100%. Compared to fixed-speed options, enjoy over 30% energy savings. Even against traditional variable frequency compressors, ours offers 5% more efficiency, especially beneficial in systems with varying gas demands.
7) No transmission loss: Our integrated shaft direct connection structure between the permanent magnet motor and compressor eliminates all transmission losses. With no couplings or auxiliary components, it achieves an extraordinary 100% transmission efficiency, setting a new benchmark in compact, efficient design.
8) Air cooling method: Embrace exceptional air cooling performance that dramatically lowers compressed air temperatures. This near-isothermal compression minimizes stage pressure loss, reducing compression ratios, and elevating overall system efficiency-setting new standards in cooling technology.
9)Smart Touch Controller:Our groundbreaking built-in intelligence promises minimal manual intervention. The high-precision color electronic screen delivers clear graphical interfaces, maintenance updates, fault alerts, and safety shutdown notices, offering a seamless, user-friendly experience.
10)Special Type Intake Valve:Ingeniously controlled automatic opening optimizes both engine fuel injection and lubricating oil flow. The ultra-low oil circuit loss further boosts overall efficiency, while the normally open solenoid valve ensures safety by preventing oil injection during emergency stops.
Ultra-low oil circuit loss enhances overall efficiency.
The normally open solenoid valve automatically closes during emergency stops to prevent oil injection, ensuring system safety.
11)Excellent Air Filter:Our premium air filter excels in air purification, guaranteeing a pristine air system through its three-stage filtration. It removes steam and dust with ease, satisfying the most stringent emission standards, and ensuring cleaner, safer air.
12)High-Quality Soundproof Cotton:Our innovative noise reduction housing, paired with superior soundproof cotton, significantly diminishes operational vibration and noise, fostering a quieter, more productive workspace.
13) Motor maintenance-free:Our permanent magnet motor is designed without internal bearings, eliminating the need for frequent maintenance. This design reduces long-term costs, enhances reliability, and provides peace of mind.
14) Noise reduction:Step into a realm of extraordinary peace and quiet with the advanced two-stage compression innovation, masterfully engineered by Sanzhi (Henan) Compressor Co., Ltd. This revolutionary technology meticulously minimizes the compression ratio, leading to a substantial decline in operational noise, especially noticeable during unloading phases. Embrace a quieter ambiance and heightened efficiency in your workspace, thereby amplifying your productivity through the Sanzhi Durable Two-Stage Permanent Magnet VFD Screw Compressor for Industrial Applications. Harness the exceptional engineering prowess of Sanzhi to elevate your industrial operations to new heights of success.
15) Effortless Maintenance and Service:Our cutting-edge two-stage compressor unit, a testament to the ingenuity of Sanzhi (Henan) Compressor Co., Ltd., retains the time-honored structure and systems typical of a single-stage compressor, save for the innovative screw air end. This design choice ensures that maintenance and servicing are both straightforward and user-friendly. Experience the ease of hassle-free upkeep, coupled with reliable, optimal performance, as you utilize the Sanzhi Durable Two-Stage Permanent Magnet VFD Screw Compressor for Industrial Applications. Place your trust in Sanzhi for seamless maintenance and outstanding operational outcomes.
| 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. Competitive Pricing
Discover the epitome of value at Sanzhi (Henan) Compressor Co., Ltd. When you choose us, you gain access to factory-direct pricing, empowering you with an unbeatable edge in market competitiveness.
2. Direct Transactions
Enjoy the benefits of exceptional cost-efficiency and the peace of mind that comes with direct transactions. From our factory to your doorstep, we deliver significant savings and reliable service every time.
3. OEM & ODM Services
Unleash the potential of our cutting-edge production and management capabilities. Our customized OEM and ODM services are specifically designed to cater to your unique specifications, ensuring your exact needs are flawlessly realized.
4. Customized Solutions
We specialize in catering to non-standard and export orders, skillfully addressing specific voltage, power, and pressure requirements. Share your customization needs with us, and we'll create solutions that perfectly align with your vision.
5. Small Order Acceptance
Start your journey with a small trial order and witness the superior quality of our offerings. Guarantee your satisfaction before committing to a larger investment.
6. Rapid Delivery
Delight in the confidence of our swift and efficient delivery services. We focus on delivering your top-quality products rapidly to ensure the uninterrupted continuity of your operations.
7. Comprehensive Authorization
Enhance your distribution reach with our extensive authorization credentials. Market and sell SANZHI brand products with full confidence, backed by thorough certification.
Sanzhi (Henan) Compressor Co., Ltd is a distinguished and reputable manufacturer specializing in cutting-edge screw air compressors and screw vacuum pumps. Boasting over a decade of unparalleled industry expertise, we present a versatile and comprehensive product lineup that 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 specifically designed for laser cutting, and both single-tank and double-tank mobile screw air compressors. Additionally, we provide electric and diesel mobile screw air compressors, as well as state-of-the-art screw vacuum pumps.
Our state-of-the-art production facility features advanced multi-air compressor assembly lines, ensuring exceptional efficiency and precision. Supported by a dedicated team of over 50 highly skilled employees, we continuously enhance our management systems, such as ERP, to significantly reduce lead times and guarantee the swift delivery of premier quality products.
Our meticulously designed management systems are dedicated to upholding the highest quality standards. Proudly certified under the ISO9001 quality management system, we adhere to rigorous quality control protocols. Each machine is subjected to comprehensive inspections at various stages, from material and production checks to pre-delivery evaluations, ensuring unmatched product reliability and excellence.
Our exemplary customer service begins with a pre-sales team that offers expert guidance for selecting the ideal air equipment tailored to diverse facilities. We provide extensive customization options, including appearance and configuration, and create bespoke products to meet specific dealer demands through our OEM services. Our professional sales and service team is always on standby to deliver prompt and efficient post-sales support, ensuring your needs are swiftly addressed.
At Sanzhi (Henan) Compressor Co., Ltd, we are unwavering in our commitment to delivering superior, reliable, and stable products. Dedicated to forging long-term relationships with our clients, we promise efficient delivery, high-quality machinery, and competitive pricing, ensuring you receive the optimal compressed air solution for your requirements.
Located in the picturesque Xinzheng City, Henan Province, China, our factory is conveniently situated just 30 kilometers from Xinzheng International Airport, approximately an hour's drive away. We warmly invite you to visit our facility and experience our exceptional offerings firsthand!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a distinguished manufacturer specializing in screw air compressors, proudly boasting over a decade of industry expertise.
Q2. How do you control quality?
A: 1. Our raw materials undergo rigorous inspection to ensure the highest quality.
2. The meticulous installation process is stringently monitored.
3. Every machine is subjected to a minimum of 5 continuous hours of testing before dispatch to ensure optimal performance.
Q3. What information must I provide to get the suitable machine?
1. Your required air delivery capacity (Unit: CFM or m³/Min).
2. The desired working pressure (Unit: PSI, Bar or Mpa).
3. The voltage and frequency specifications of your country of residence (V/Hz).
4. Any additional accessories needed, such as an air tank, filters, or air dryers.
Share this information with us, and we will tailor a perfect 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 (Henan) Compressor Co., Ltd. proudly presents a diverse array of voltage options designed to meet global standards, featuring 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, and 440v/60hz/3p. Additionally, we deliver customized solutions that are expertly crafted to align with your unique electrical specifications, ensuring optimal compatibility and performance.
Q6. How long is the delivery time?
A: For our standard voltage units, we pledge delivery within a swift 15 working days following order confirmation. For those with non-standard voltage needs, we encourage you to contact our dedicated sales team, who will provide you with tailored and precise delivery timelines to meet your expectations.
Q7. What's the payment term?
A: Our payment terms are thoughtfully designed for your convenience and flexibility: 30% T/T in advance, 40% T/T before shipment, and the remaining 30% T/T upon receipt of the B/L copy. We are pleased to accommodate payments in both USD and RMB, catering to your financial preferences.
Q8. How about your warranty?
A: At Sanzhi, we are committed to quality and reliability, offering a comprehensive warranty: one year covering the entire machine and two years for the screw air compressor, excluding consumable spare parts, ensuring your peace of mind and satisfaction.
Q9. What about the maintenance?
A: Proper initial maintenance is vital and should be performed after 500 hours of operation. Thereafter, maintenance should be conducted at intervals between 2000-3000 hours, tailored to the specific demands of your working environment, ensuring longevity and optimal performance.
Q10. Can machines be run in high-temperature environment?
A: Certainly! Our machines are meticulously engineered to excel, even in extreme temperature conditions, consistently delivering high performance within a versatile operating range of -20° to 45° (-4ºF to 113ºF), guaranteeing reliability under diverse environmental challenges.
Q11. Do you offer OEM service?
A: Indeed, we are experts in offering both OEM and ODM services. Our proficient design team is fully equipped to transform your custom orders into reality, delivering bespoke solutions that are meticulously aligned with your exact specifications, ensuring a perfect fit and exceptional results.
Q12. How long could your air compressor be used?
A: Our air compressors are crafted with endurance and resilience in mind, providing an impressive lifespan that typically surpasses 10 years of consistent, dependable performance, making them a wise long-term investment for your operations.
Q13. Will you provide some spare parts for the machines?
A: Certainly, we offer an extensive selection of premium spare parts to facilitate seamless operation and sustained peak performance of your machines, ensuring they continue to function optimally over time.
Q14. How about your after-sales service?
A: Our after-sales service is exceptional, featuring comprehensive online guidance for installation and commissioning. Moreover, we are equipped to deploy skilled engineers to deliver hands-on training and thorough installation assistance when required, ensuring your complete satisfaction and peace of mind.
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