Introducing the revolutionary Sanzhi 90kw Low Pressure Screw Compressor from Sanzhi (Henan) Compressor Co., Ltd.! This cutting-edge solution stands as a beacon of industrial innovation with its sophisticated Two-Stage Compression and Permanent Magnet Variable Frequency Drive technology. Engineered with precision, this Screw Air Compressor is available in an extensive array of power options-ranging from 15KW to a robust 250KW-ensuring optimal efficiency and unparalleled reliability across all industrial applications. Transform your operational capabilities and elevate your industry standards with this state-of-the-art compressor, meticulously designed to accommodate the multifaceted demands of modern industries.
Internal Structure Frontside
Internal Structure Backside
Working Principle
In the ideal air compression process, the power required for single-stage pressure transmission equates to the sum needed for multiple-stage compression. However, real-world factors such as coupling power loss, bearing friction, and liquid viscosity cooling effects result in higher actual working power. By minimizing the compression ratio of each stage, these inefficiencies are mitigated, making the overall power consumption for multi-stage compression lower than that of single-stage compression.
The two-stage screw air compressor is a sophisticated system featuring a two-stage rotary screw mechanism. Each stage includes an active screw that drives a passive screw through an external power transmission device. The first stage incorporates a low-pressure screw group, while the second stage utilizes a high-pressure screw group. Each screw is surrounded by a sealing air film. As the screws rotate, the gas undergoes three processes: suction, pressurization, and exhaust, ensuring efficient compression.
First Stage Compression: The initial stage of the two-stage screw air compressor employs a low-pressure screw group to compress the gas. The gas enters the compression chamber via the suction valve and is compressed by the high-speed rotation of the screw rotor before being transferred to the second stage.
Second Stage Compression: In the second stage screw group, the gas undergoes further compression within a tighter screw space, achieving higher temperatures and pressures. The exhaust valve then opens to release the high-pressure gases from the system, completing the compression process.
Natural air is drawn through the air filter into the first compression stage, where it mixes with a small amount of lubricating oil. This mixture is compressed to an interstage pressure. The gas then passes through the cooling channel, interacting with a large amount of oil mist, which significantly reduces its temperature. The cooled and compressed gas proceeds to the second-stage rotor for final compression to the ultimate exhaust pressure. The process culminates as the fully compressed gas exits through the exhaust valve, concluding the compression cycle.
1) High efficiency of PM motor:Experience unparalleled efficiency with our advanced permanent magnet motor. Its constant torque range and weak magnetic range are significantly wider, delivering an efficiency boost of 20-30% over conventional motors. Even when operating away from the rated frequency, the motor sustains its high efficiency, ensuring optimal performance at all times.
2)Two-stage compression unique air end:Our revolutionary two-stage compression screw machine features a uniquely designed air end. The first and second-stage compression rotors are combined within a single casing and driven directly by gears, enabling each rotor to achieve the optimal linear speed and thereby maximizing compression efficiency.
3)Integrated frequency converter: Equipped with China's premier frequency system, the air compressor offers a wide range of speed regulation and high precision. Users can modulate the frequency according to actual gas demand, leading to remarkable energy savings and operational efficiency.
4)Reduce internal leakage:Employing two-stage compression technology reduces the compression ratio for each stage, thereby minimizing internal leakage from the high-pressure end to the low-pressure end while significantly enhancing volumetric efficiency.
5)Variable frequency start and the soft startof the motor are achieved, significantly reducing the impact on power grid equipment and preventing damage to electrical components.
6)Reduce energy consumption: Our frequency conversion operates from 25% to 100%, a significant improvement over the ordinary 50% to 100% range. Compared to fixed-speed air compressors, energy savings can exceed 30%. Even against regular variable frequency compressors, it offers around 5% more energy efficiency, with greater savings for systems with fluctuating gas demands.
7)No transmission loss: The permanent magnet motor and compressor utilize an embedded integrated shaft direct connection structure, making it more compact. With no couplings or other transmission parts, the transmission efficiency reaches an unparalleled 100%.
8)Air cooling method: Our high energy-efficient air cooling method delivers excellent cooling performance, significantly reducing the temperature of compressed air. This near-isothermal compression also minimizes pressure loss between stages, reducing the compression ratio and enhancing overall efficiency.
9)Smart Touch Controller:Our state-of-the-art built-in intelligence requires minimal manual operation. Featuring a high-precision color electronic screen, it provides clear graphical displays, maintenance information, fault alarms, and safety shutdown alerts for seamless operation.
10)Special Type Intake Valve:Automatically controlled opening ensures smooth engine fuel injection and lubricating oil circulation.
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 top-tier air filter boasts exceptional air purification capabilities, ensuring a clean air system with three-stage filtration for superior air quality. It efficiently removes steam and dust, meeting stringent emission standards.
12)High-Quality Soundproof Cotton:Our compact noise reduction housing, coupled with high-quality soundproof cotton, minimizes operational vibration and significantly enhances noise reduction, ensuring a quieter, more efficient workspace.
13)Motor maintenance-free:Our permanent magnet motor, free of internal bearings, eliminates the need for motor bearing maintenance and replacement, reducing long-term maintenance costs and enhancing reliability.
14)Noise reduction:Experience unparalleled tranquility with Sanzhi (Henan) Compressor Co., Ltd.'s state-of-the-art two-stage compression technology. Our advanced system significantly lowers the compression ratio, leading to a dramatic reduction in operational noise, especially during unloading. Enjoy a quieter and more efficient work environment with the Sanzhi 90kw Low Pressure Screw Compressor.
15) Easy Maintenance and Service:Our two-stage compressor unit, part of the Sanzhi 90kw Low Pressure Screw Compressor line, retains the familiar structure and systems of a single-stage compressor, excluding the screw air end. This thoughtful design ensures that maintenance and service remain straightforward and user-friendly for all, making your upkeep process hassle-free and efficient.
| 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. Unbeatable Pricing
We provide our customers with direct factory prices, ensuring you stay ahead in the market with unmatched rates that are hard to beat.
2. Direct Factory Transactions
Our products come straight from the factory, ensuring superior cost-effectiveness and direct sourcing for all your needs.
3. OEM & ODM Expertise
Leveraging our strong production and management capabilities, we offer comprehensive OEM/ODM services, perfectly tailored to meet your requirements.
4. Tailored Solutions
We welcome non-standard orders, including export orders with specific voltage, power, and pressure needs. Reach out to us for your customization requirements.
5. Flexible Order Sizes
Evaluate the exceptional quality of our products with a small trial order and see the difference for yourself.
6. Fast and Reliable Delivery
Experience high-quality products with prompt and reliable delivery, ensuring your operations run smoothly and without interruption.
7. Full Authorization for Distributors
We provide comprehensive authorization certificates to our valued distributors, empowering you to market and sell SANZHI brand products with complete confidence.
Sanzhi (Henan) Compressor Co., Ltd is a prestigious manufacturer specializing in the production of screw air compressors and screw vacuum pumps. With over a decade of industry expertise, we offer a comprehensive product range 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 designed for laser cutting, single-tank and double-tank mobile screw air compressors, electric and diesel mobile screw air compressors, and screw vacuum pumps.
Our state-of-the-art production facility utilizes multi-air compressor assembly lines to ensure unparalleled efficiency. Backed by a dedicated team of over 50 employees, we continuously refine our management systems, such as ERP, to minimize lead times and ensure rapid delivery of top-quality products.
Our management systems are designed to uphold the highest standards of quality. Certified under the ISO9001 quality management system, we rigorously follow strict quality control protocols. Every machine undergoes thorough inspections at various stages, from material and production checks to pre-delivery evaluations, guaranteeing unmatched product reliability.
In terms of customer service, our pre-sales team provides expert guidance on selecting the ideal air equipment for diverse facilities and offers extensive customization options, including appearance and configuration. We even create bespoke products to meet specific dealer demands through our OEM services. Our professional sales and service team is always ready to offer prompt support post-sales, ensuring swift responses to any customer needs.
At Sanzhi (Henan) Compressor Co., Ltd, we are committed to delivering superior, reliable, and stable products, aiming to forge long-term relationships with our clients. Our promise includes efficient delivery, high-quality machinery, and competitive pricing, ensuring you receive an optimal compressed air solution.
Nestled in Xinzheng City, Henan Province, China, our factory is conveniently located just 30 kilometers away from Xinzheng International Airport, approximately one hour's drive. We warmly welcome you to visit our facility and experience our 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 offers a range of voltages including 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, 440v/60hz/3p, with customization options to meet your specific requirements.
Q6. How long is the delivery time?
A: For standard voltage units, delivery is within 15 working days post order confirmation. For non-standard requirements, please contact our sales team.
Q7. What's the payment term?
A: Payment terms include 30% T/T in advance, 40% T/T before shipment, and the remaining 30% T/T upon B/L copy. Payments can be made in USD or RMB.
Q8. How about your warranty?
A: We offer a comprehensive warranty of one year for the entire machine and two years for the screw air compressor, excluding consumable spare parts.
Q9. What about the maintenance?
A: The initial maintenance is required after 500 hours of operation. Subsequent maintenance should be performed every 2000-3000 hours, taking into account the actual working environment.
Q10. Can machines be run in high-temperature environment?
A: Absolutely, our machines are designed to operate efficiently in high-temperature environments, with a working temperature range from -20° to 45° (-4ºF to 113ºF).
Q11. Do you offer OEM service?
A: Yes, we excel in both OEM & ODM services, backed by our professional design team. Your custom orders are highly welcomed.
Q12. How long could your air compressor be used?
A: Our air compressors are engineered for longevity, typically exceeding 10 years of service life.
Q13. Will you provide some spare parts for the machines?
A: Absolutely! We proudly offer a wide range of high-quality spare parts, meticulously crafted to ensure the seamless and efficient operation of your machines.
Q14. How about your after-sales service?
A: We provide exceptional after-sales support that encompasses online installation and commissioning guidance. Additionally, we can arrange for skilled engineers to provide on-site training and installation assistance whenever required.
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