Witness the robust and powerful 200KW (272HP) Screw Compressor by Sanzhi (Henan) Compressor Co., Ltd., your trusted China supplier! Introducing our Permanent Magnet Variable Frequency Two-Stage Screw Air Compressor, meticulously engineered with high-quality centrifugal fans to maximize energy savings and efficiency. This stationary type, industrial-grade marvel delivers unbeatable factory prices, making it the perfect choice for those who seek uncompromised performance and reliability.
Comprehensive Examination of the Internal Structure - Frontside
In-Depth Analysis of the Internal Structure - Backside
Detailed Working Principle
In an ideal air compression process, the power needed for single-stage pressure transmission equals the sum required for multi-stage compression. Yet, in real-world scenarios, actual working power increases due to the power loss from coupling transmission, bearing friction, and the cooling effect of liquid viscosity, among other factors. By reducing the compression ratio at each stage, the overall power required for multi-stage compression can be minimized, making it more efficient than single-stage compression.
The innovative two-stage screw air compressor integrates a sophisticated two-stage rotary screw setup. Each stage features an active and a passive screw, with the active screw driving the passive screw via an external power transmission device. The first stage utilizes a low-pressure rate screw group, while the second stage operates with a high-pressure rate screw group. Surrounding each screw is a sealing air film. During operation, the gas undergoes three pivotal processes: suction, pressurization, and exhaust.
First Stage Compression: In the initial stage of the two-stage screw air compressor, a low-pressure rate screw group compresses the gas. The gas enters the screw compression chamber through the suction valve. Here, the high-speed rotation of the screw rotor gradually squeezes out the gas, transferring it to the second stage.
Second Stage Compression: The second stage screw group compresses the gas in a tighter screw space at higher temperature and pressure. Upon reaching the desired compression, the exhaust valve opens, expelling the high-pressure gases from the system.
Natural air enters the first compression stage via the air filter, where it mixes with a small amount of lubricating oil. This mixture is compressed to interstage pressure. The compressed gas then flows into the cooling channel, interacting with a significant quantity of oil mist to reduce its temperature substantially. The cooled gas enters the second-stage rotor, experiencing further compression to the final exhaust pressure. The entire compression process culminates as the compressor discharges through the exhaust valve.
| 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 innovative centrifugal fan, with its high-speed rotating impeller, accelerates and decelerates air for superior cooling efficiency. By directing air from the axial direction, it effectively reduces the motor temperature more rapidly than traditional air-cooled fans. This ensures continuous compressor operation and significantly extends its service life.
1) Exceptional PM Motor Efficiency:The permanent magnet motor boasts a broader constant torque and weak magnetic range, delivering 20-30% higher efficiency than standard motors. Remarkably, its efficiency remains stable even when operating away from rated frequency, maintaining superior performance.
2) Maintenance-Free Motor:With no internal bearings, the permanent magnet motor eliminates the need for costly bearing maintenance and replacement.
3) Integrated Frequency Converter:Utilizing China's premier frequency system, it offers extensive speed regulation and high precision. Tailored modulation based on actual gas demand ensures remarkable energy savings for the air compressor.
4) Zero Transmission Loss:The permanent magnet motor and compressor feature an embedded integrated shaft direct connection, resulting in a more compact structure. The absence of couplings and other transmission components ensures 100% transmission efficiency.
5) Variable Frequency and Soft Start:Facilitates variable frequency start and soft start of the motor, significantly minimizing the impact on power grid equipment and preventing damage to electrical systems.
6) Optimized Energy Consumption:With a frequency conversion range from 25% to 100% (compared to the standard 50% to 100%), this system saves over 30% more energy than fixed-speed air compressors, and approximately 5% more than regular variable frequency units. The larger the system's gas consumption fluctuation, the more pronounced the energy-saving effect.
7) Unique Two-Stage Compression Air End:This innovative design integrates the first and second-stage compression rotors within a single casing, driven directly by gears. This configuration ensures each rotor achieves optimal linear speeds, enhancing compression efficiency.
8) Internal Spray Curtain Cooling:Employing a high-energy-saving internal spray curtain cooling method, it effectively lowers compressed air temperatures and achieves near-isothermal compression. This approach also reduces pressure loss between stages, lowers the compression ratio, and boosts compression efficiency.
9) Minimized Internal Leakage:By adopting two-stage compression, the system reduces the compression ratio for each stage, minimizing internal leakage from high-pressure to low-pressure ends and enhancing volumetric efficiency.
10) Superior Noise Reduction:Two-stage compression decreases the overall compression ratio, resulting in significantly lower noise levels, particularly in unloading.
11) Simplified Maintenance and Service:Apart from the screw air end, the two-stage compressor unit's systems and structures are largely similar to single-stage compression units. This similarity facilitates easy maintenance and user convenience.
1. Unmatched Pricing Advantage
We offer our customers unbeatable ex-factory prices, helping you stay ahead in the competitive market.
2. Direct Transactions
Our products come straight from the factory, ensuring you receive the most cost-effective solutions.
3. Comprehensive OEM & ODM Services
With our robust production and management capabilities, we provide top-notch OEM/ODM services tailored to your needs.
4. Personalized Customization
We cater to non-standard orders, export orders, and specific requirements for voltage, power, and pressure. Reach out to us for any customized needs.
5. Small Order Acceptance
Start with a small trial order to experience the superior quality of our products firsthand.
6. Rapid Delivery
Our high-quality products are delivered with utmost punctuality.
7. Full Authorization for Distributors
We provide comprehensive authorization certificates for distributors, enabling you to confidently sell our esteemed SANZHI brand products.
Sanzhi (Henan) Compressor Co., Ltd is a distinguished manufacturer specializing in screw air compressors and screw vacuum pumps, boasting over a decade of expertise. Our expansive product portfolio includes normal pressure/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 mobile screw air compressors, double-tank mobile screw air compressors, electric mobile screw air compressors, diesel mobile screw air compressors, and screw vacuum pumps, among others.
In production, our state-of-the-art multi-air compressor assembly lines enable us to achieve unparalleled efficiency. Supported by a dedicated team of over 50 employees, we continually refine our management systems, including ERP, to expedite lead times and deliver superior products swiftly.
In management, our factory has achieved ISO9001 quality management system certification. We unwaveringly adhere to a rigorous quality management system, implementing stringent quality control processes. Each machine undergoes meticulous material inspection, production inspection, and pre-delivery inspection to ensure excellence.
In customer service, our pre-sales team provides expert guidance on selecting air equipment tailored to various facilities, offering high customization in appearance and allocation. We cater to individual dealer demands through OEM services. Meanwhile, our after-sales team, comprising professional sales and service personnel, ensures prompt responses to customer inquiries.
At Sanzhi (Henan) Compressor Co., Ltd, we are committed to delivering superior and stable products, fostering long-term relationships with our clients. With efficient delivery, high-quality machines, and competitive pricing, we are your dependable partner for comprehensive compressed air solutions.
Our factory is conveniently located in Xinzheng City, Henan Province, China. We offer transportation from Xinzheng International Airport to our factory, a journey of approximately 30 kilometers or one hour. We warmly welcome you to visit our company!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a professional manufacturer of screw air compressors with over 10 years of experience.
Q2. How do you control quality?
A: 1. Raw materials undergo strict inspection.
2. Installation procedures are rigorously controlled.
3. Each machine undergoes at least 5 hours of continuous testing before dispatch.
Q3. What information must I provide to get the suitable machine?
1. Required air delivery capacity (Unit: CFM or m³/Min)
2. Required working pressure (Unit: PSI, Bar or Mpa)
3. Voltage and frequency of your country of residence (V/Hz)
4. Additional accessories needed, such as an air tank, filters, or air dryers.
Provide this information, and we will tailor a 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 voltages including 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, 440v/60hz/3p, with customization available to meet your specific requirements.
Q6. How long is the delivery time?
A: For standard voltage orders, we deliver within 15 working days after the order is confirmed. For non-standard requirements, please contact our sales team for further assistance.
Q7. What's the payment term?
A: The payment terms are as follows: 30% T/T in advance, 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 offer a comprehensive warranty: 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 first maintenance should be performed after 500 hours of operation. Subsequent maintenance should be conducted every 2000-3000 hours, taking into account the actual operating environment.
Q10. Can machines be run in high-temperature environments?
A: Absolutely, our machines are designed to operate in high-temperature environments, with a working temperature range from -20°C to 45°C (-4ºF to 113ºF).
Q11. Do you offer OEM service?
A: Yes, we welcome both OEM and ODM orders, supported by our professional design team.
Q12. How long could your air compressor be used?
A: Our air compressors are designed for a lifespan of over 10 years under normal operating conditions.
Q13. Will you provide some spare parts for the machines?
A: Yes, we will indeed provide spare parts for the machines.
Q14. How about your after-sales service?
A: We offer comprehensive after-sales service, including online installation and commissioning instructions, and we can arrange for our engineers to assist with training and installation.
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