Internal Structure - Frontside
Internal Structure - Backside
Working Principle
In an ideal air compression scenario, the power needed for single-stage pressure transmission equals the sum required for multi-stage compression. However, in practical applications, actual operational power increases due to inefficiencies like power loss from coupling, bearing friction, and the cooling effects of liquid viscosity. By minimizing the compression ratio at each stage, the total power for multi-stage compression can be reduced compared to single-stage compression, effectively diminishing these inefficiencies.
The Industrial Two-Stage Screw Air Compressor boasts a cutting-edge dual-stage rotary screw mechanism. Each stage is equipped with an active and a passive screw, with the active screw driving the passive one via an external power transmission device. The first stage employs a low-pressure screw group, while the second stage utilizes a high-pressure screw group. Each screw rotates within an air-tight seal, ensuring efficient operation. During this process, the gas undergoes three critical stages of compression: suction, pressurization, and exhaust.
First Stage Compression: The initial stage harnesses a low-pressure screw group to compress the incoming gas. Gas enters the compression chamber through the suction valve. Under the rapid rotation of the screw rotor, the gas experiences progressive compression before being transferred to the second stage.
Second Stage Compression: Here, the gas moves into a more confined screw space where it is compressed at elevated temperatures and pressures. The exhaust valve then opens to release the high-pressure gas from the system, completing this vital stage of compression.
Natural air is meticulously filtered before entering the first stage of compression, where it combines with a small amount of lubricating oil in the compression chamber. This mixture undergoes initial compression to interstage pressure. The compressed gas navigates through a cooling channel, interacting with a significant amount of oil mist, which reduces its temperature. The cooled gas then enters the second-stage rotor for further compression and is ultimately expelled through the exhaust valve, culminating the entire sophisticated compression process.
Harness the superior cooling power of water with our water-cooled compressors! By circulating cooling water through the system, it not only cools but also cleans internal components, enhances lubrication, and extends the lifespan of parts prone to wear. This process efficiently dissipates heat from both the cylinder and compressed gas, leading to significantly reduced exhaust temperature and power consumption, and thereby slashing operational costs. However, it's crucial for users to regularly monitor for potential scaling within the water cooling system to ensure ongoing efficiency.
1) Superior Efficiency of PM Motor:Our cutting-edge permanent magnet motor excels with a broader constant torque and weak magnetic range, achieving 20-30% higher efficiency than conventional motors. It consistently delivers extraordinary performance, even when operating beyond the rated frequency, ensuring maximum efficiency at all times.
2) Maintenance-Free Motor:Designed to be maintenance-free, our permanent magnet motor eliminates internal bearings, thus removing the need for frequent maintenance and costly bearing replacements, ensuring hassle-free operation.
3) Integrated Frequency Converter:Featuring China's premier frequency system, this unit offers an extensive speed regulation range and unmatched precision. It adapts seamlessly to the user's real-time gas needs, delivering substantial energy-saving benefits for the air compressor.
4) Zero Transmission Loss:Our innovative design with an integrated shaft structure directly connects the permanent magnet motor and compressor, removing couplings and transmission parts to achieve a flawless 100% transmission efficiency.
5) Variable Frequency and Soft Start:Our motor supports variable frequency and soft start, drastically reducing impacts on power grid equipment and safeguarding electrical components from damage.
6) Enhanced Energy Efficiency:With a frequency conversion range of 25% to 100% (versus the standard 50% to 100%), our system delivers over 30% energy savings compared to fixed-speed compressors and approximately 5% more than standard variable frequency compressors. Increased system gas consumption fluctuations further amplify these energy-saving benefits.
7) Unique Two-Stage Compression Air End:Our two-stage compression screw machine incorporates a uniquely designed air end with both first and second-stage compression rotors housed in a single casing. By rotating through gears, it achieves optimal linear speed for each stage, thereby maximizing compression efficiency.
8) Innovative Internal Spray Curtain Cooling:Experience superior cooling performance with our advanced internal spray curtain cooling method. This technique significantly lowers the temperature of compressed air to near-isothermal levels, reducing pressure loss between stages and improving overall compression efficiency.
9) Minimized Internal Leakage:Our two-stage compression design reduces the compression ratio for each stage, minimizing internal leakage from high-pressure to low-pressure areas, thus enhancing volumetric efficiency.
10) Noise Reduction:The two-stage compression mechanism effectively lowers the compression ratio, resulting in significantly reduced operational noise, especially during unloading phases.
11) Simplified Maintenance and Service:Apart from the screw air end, our two-stage compressor unit shares many systems and structures with single-stage compressors, making it easy to maintain and user-friendly.
1. Unmatched Price Advantage
We offer direct ex-factory pricing, empowering our customers with a competitive edge through unbeatable cost savings.
2. Direct Deal Benefits
Our products are supplied directly from the factory, ensuring you receive the most cost-effective and high-quality solutions available.
3. Comprehensive OEM & ODM Services
With our robust production and management capabilities, we deliver exceptional OEM/ODM services tailored specifically to your individual needs.
4. Bespoke Customisation Services
We accept non-standard and export orders, customizing voltage, power, pressure, and more to meet your exact specifications. Reach out with your unique requirements.
5. Small Order Acceptance
Experience our commitment to quality by placing a small trial order to test our products' excellence firsthand.
6. Expedited Delivery
Enjoy the combination of superior product quality and prompt delivery, ensuring you receive your orders swiftly and efficiently.
7. Comprehensive Authorization
For our valued distributors, we provide full authorization certificates, empowering you to sell SANZHI brand products with complete confidence and legitimacy.
About us
Sanzhi (Henan) Compressor Co., Ltd is a premier manufacturer excelling in the production of screw air compressors and screw vacuum pumps, boasting over a decade of industry experience. Our diverse product portfolio features state-of-the-art screw air compressors and vacuum pumps including normal pressure/low-pressure screw air compressors, permanent magnet frequency conversion models, two-stage compression units, screw air compressors for laser cutting, single-tank and double-tank mobile screw air compressors, electric and diesel mobile screw air compressors, and advanced screw vacuum pumps.
In production, our cutting-edge assembly lines facilitate the most efficient manufacturing processes. Thanks to our dedicated team of over 50 employees, we continuously optimize management systems such as ERP to minimize lead times and ensure the swift delivery of high-quality products.
In management, our factory proudly holds ISO9001 quality management system certification. We adhere to stringent quality standards, implementing rigorous quality control processes. Every machine undergoes comprehensive inspections, including material checks, production assessments, and pre-delivery evaluations, ensuring only the finest products leave our facility.
In customer service, we excel in pre-sales consultation, offering professional guidance to help customers select the ideal air equipment tailored to their specific needs. Our high level of customization extends to both appearance and configuration, and we provide OEM services to meet unique dealer demands. For after-sales support, our professional sales and service team ensures prompt and efficient customer responses.
At Sanzhi (Henan) Compressor Co., Ltd, we are committed to delivering superior, stable products and fostering long-term customer relationships. With efficient delivery, top-quality machines, and competitive pricing, we are your reliable partner for comprehensive compressed air solutions.
Our factory is conveniently located in Xinzheng City, Henan Province, China. We offer complimentary pick-up services from Xinzheng International Airport, located just 30 kilometers away-about an hour's drive. We warmly welcome your visit to our company!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a seasoned manufacturer specializing in screw air compressors, backed by over 10 years of expertise.
Q2. How do you control quality?
A: 1. We rigorously inspect all raw materials.
2. Installation procedures are meticulously controlled.
3. Each machine undergoes a minimum of 5 hours of continuous testing before leaving our factory 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 for your country (V/Hz)
4. Additional accessories needed (e.g., air tanks, filters, air dryers).
Provide these details, and we will design a tailored 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 air compressors are available in various voltages including 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, 440v/60hz/3p, and can be customized to meet your specific requirements.
Q6. How long is the delivery time?
A: For standard voltage orders, your request will be processed promptly within a swift 15 working days after confirmation. For non-standard specifications, please reach out to our dedicated sales team to receive detailed timelines tailored to your needs.
Q7. What's the payment term?
A: We require an initial 30% T/T deposit upfront, followed by another 40% T/T before shipment, and the remaining 30% T/T upon receipt of the B/L copy. Payments are accepted in both USD and RMB.
Q8. How about your warranty?
A: We proudly offer a comprehensive one-year warranty for the entire machine, along with an extended two-year warranty specifically for the screw air compressor, with the exception of consumable spare parts.
Q9. What about the maintenance?
A: The initial maintenance should be conducted after 500 hours of operation. Subsequent maintenance is recommended every 2000-3000 hours, adaptable to the specific working environment.
Q10. Can machines be run in high-temperature environment?
A: Absolutely, our machines are engineered to perform efficiently in high-temperature environments, with a robust working temperature range from -20°C to 45°C (-4°F to 113°F).
Q11. Do you offer OEM service?
A: Yes, we proudly offer both OEM and ODM services, facilitated by our professional design team. Custom orders are highly welcome and catered to with precision.
Q12. How long could your air compressor be used?
A: Typically, our air compressors boast a lifespan exceeding 10 years, ensuring long-term reliability and performance.
Q13. Will you provide some spare parts for the machines?
A: Certainly, we will provide essential spare parts to ensure the optimal functioning of your machines.
Q14. How about your after-sales service?
A: We offer comprehensive after-sales support, including detailed online instructions for installation and commissioning. Additionally, our skilled engineers are available for on-site training and installation assistance.
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