Internal Structure - Frontside
Internal Structure - Backside
Working Principle
In an ideal air compression scenario, the power required for single-stage pressure transmission equals the total power needed for multi-stage compression. However, in real-world applications, the actual operational power increases due to inefficiencies such as power loss from coupling, bearing friction, and cooling effects of liquid viscosity. By minimizing the compression ratio at each stage, the total power required for multi-stage compression can be reduced compared to single-stage compression, effectively diminishing these inefficiencies.
The two-stage screw air compressor boasts a sophisticated dual-stage rotary screw mechanism. Each stage houses an active and 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 airtight seal. During rotation, the gas undergoes three pivotal stages: suction, pressurization, and exhaust.
First Stage Compression: The initial compression stage leverages a low-pressure screw group to compress the gas. Gas enters the compression chamber through the suction valve, and under the high-speed rotation of the screw rotor, it is progressively compressed before being transferred to the second stage.
Second Stage Compression: In this advanced stage, the gas moves into a more confined screw space where it is compressed at higher temperatures and pressures. The exhaust valve then opens to release the high-pressure gas from the system, culminating the compression process.
Natural air is first filtered before entering the initial stage of compression, where it mixes with a small amount of lubricating oil within the compression chamber. This mixture is compressed to interstage pressure. The compressed gas then navigates through a cooling channel, encountering a significant amount of oil mist that lowers its temperature. The cooled gas enters the second-stage rotor for further compression and is ultimately expelled through the exhaust valve, thus completing the entire compression cycle.
Harnessing the unparalleled cooling power of water, our water-cooled compressors are designed to elevate your operations. The circulating water not only cleans internal components but also enhances lubrication and prolongs the lifespan of friction-prone parts. During operation, this system efficiently dissipates heat from both the cylinder and the compressed gas, significantly reducing exhaust temperature and power consumption. This means lower operational costs for you. However, it's crucial to monitor potential scaling issues within the water cooling system to ensure optimal performance.
1) Unmatched Efficiency of PM Motor:Our cutting-edge permanent magnet motor features a broader constant torque and weak magnetic range, delivering 20-30% higher efficiency compared to conventional motors. Remarkably, it maintains superior efficiency even when running away from the rated frequency, guaranteeing exceptional motor performance.
2) Maintenance-Free Innovation:Built without internal bearings, our advanced permanent magnet motor eliminates the need for expensive maintenance and bearing replacements, ensuring seamless, hassle-free operation.
3) Integrated Frequency Converter:Armed with China's premier frequency system, this unit boasts a wide speed regulation range and high precision. It adeptly adjusts to the actual gas demand, offering impressive energy-saving advantages for the air compressor.
4) Pure Transmission Efficiency:Featuring an integrated shaft structure that directly connects the permanent magnet motor and compressor, this design eradicates couplings and other transmission parts, achieving a flawless 100% transmission efficiency.
5) Variable Frequency and Gentle Start:Our motor supports variable frequency start and soft start, significantly reducing the impact on power grid equipment and preventing potential damage to electrical components.
6) Superior Energy Efficiency:With a frequency conversion range from 25% to 100% (compared to the conventional 50% to 100%), this system offers over 30% energy savings compared to fixed-speed compressors and approximately 5% more energy savings than standard variable frequency compressors. The greater the system's gas consumption fluctuations, the more pronounced the energy-saving effects.
7) Revolutionary Two-Stage Compression Air End:Our two-stage compression screw machine features a uniquely engineered air end that integrates both first-stage and second-stage compression rotors within a single casing. By rotating through gears, it achieves the ideal linear speed for each stage, significantly enhancing compression efficiency.
8) Cutting-Edge Internal Spray Curtain Cooling:Our innovative internal spray curtain cooling method provides exceptional cooling performance, drastically reducing the temperature of compressed air to near isothermal compression, and diminishing pressure loss between stages, thereby improving overall compression efficiency.
9) Minimizing Internal Leakage:Utilizing two-stage compression, we lower the compression ratio of each stage, reducing internal leakage from high-pressure to low-pressure ends and consequently enhancing volumetric efficiency.
10) Enhanced Noise Reduction:The two-stage compression mechanism decreases the compression ratio, significantly reducing operational noise, especially during unloading phases.
11) Simplified Maintenance and Service:Aside from the screw air end, our two-stage compressor unit retains similar systems and structures to single-stage compressors, ensuring maintenance simplicity and user convenience.
1. Unmatched Price Edge
With direct ex-factory pricing, we empower our customers with a definitive competitive advantage.
2. Direct Deal Perks
Source directly from the factory and secure the most cost-effective solutions available.
3. Extensive OEM & ODM Services
Leverage our robust production and management capabilities for outstanding OEM/ODM services tailored specifically to your needs.
4. Personalized Customization Services
We cater to non-standard and export orders, customizing voltage, power, pressure, and more. Share your precise requirements with us.
5. Acceptance of Small Orders
Evaluate the quality of our products by placing a small trial order first.
6. Rapid Delivery
Benefit from the fusion of superior product quality and swift delivery times.
7. Full Authorization Support
We provide comprehensive authorization certificates to our distributors, enabling the confident sale of SANZHI brand products.
About us
Sanzhi (Henan) Compressor Co., Ltd stands as a distinguished leader in the realm of screw air compressors and screw vacuum pumps, with a rich history of over ten years in the industry. Our extensive and cutting-edge product line encompasses normal pressure and low-pressure screw air compressors, permanent magnet frequency conversion models, two-stage compression units, and specialized applications such as laser cutting. We also offer single-tank and double-tank mobile screw air compressors, both electric and diesel-powered, along with advanced screw vacuum pumps.
In production, we employ state-of-the-art assembly lines that streamline efficiency and optimize manufacturing processes. Our dedicated team of over 50 employees ensures operational excellence, leveraging advanced management systems like ERP to reduce lead times and guarantee the rapid delivery of superior products.
In management, we proudly hold the ISO9001 quality management system certification, a testament to our unwavering commitment to quality. We implement stringent quality control measures, conducting comprehensive inspections that include material checks, production assessments, and pre-delivery evaluations to ensure that only top-tier products reach our customers.
In customer service, we lead with excellence, providing expert pre-sales consultation to help customers choose the perfect air equipment for their needs. Our extensive customization options cover both appearance and configuration, and we offer OEM services to meet specific dealer requirements. Our professional sales and service team ensures prompt and efficient after-sales support, guaranteeing complete customer satisfaction.
At Sanzhi (Henan) Compressor Co., Ltd, our mission is to deliver high-quality, reliable products and foster enduring customer relationships. With swift delivery, premium machines, and competitive pricing, we are the dependable partner you can trust for all your compressed air solution needs.
Our factory enjoys a strategic location in Xinzheng City, Henan Province, China, just 30 kilometers (about an hour's drive) from Xinzheng International Airport. We offer complimentary pick-up services for your convenience and warmly invite you to visit us!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a seasoned manufacturer with over a decade of expertise in specializing in screw air compressors.
Q2. How do you control quality?
A: 1. All raw materials undergo rigorous inspection.
2. Installation procedures are meticulously controlled to ensure precision.
3. Each machine is subjected to at least 5 hours of continuous testing before dispatch to guarantee 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. Any additional accessories needed (e.g., air tanks, filters, air dryers).
Provide these essential details, and we will craft a tailored solution to meet your needs!
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 versatile and available in a range of voltages including 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, 440v/60hz/3p, and can be customized to your specific requirements.
Q6. How long is the delivery time?
A: For standard voltage orders, you can expect processing within an expedited 15 working days post-confirmation. For non-standard specifications, please contact our sales team for a personalized timeline tailored to your needs.
Q7. What's the payment term?
A: Our payment terms are structured as follows: 30% T/T in advance, 40% T/T prior to shipment, and the final 30% T/T upon receipt of the Bill of Lading copy. We accept payments in both USD and RMB.
Q8. How about your warranty?
A: We provide a robust one-year warranty covering the entire machine, alongside an extended two-year warranty specifically for the screw air compressor, excluding consumable spare parts.
Q9. What about the maintenance?
A: The first maintenance check should be performed after 500 hours of operation. Subsequent maintenance is required every 2000-3000 hours, adjustable based on the actual working environment.
Q10. Can machines be run in high-temperature environment?
A: Absolutely, our machines are engineered for high efficiency in extreme temperature conditions, with an operational range from -20°C to 45°C (-4°F to 113°F).
Q11. Do you offer OEM service?
A: Yes, we proudly provide OEM and ODM services, supported by our expert design team. Custom orders are highly welcome.
Q12. How long could your air compressor be used?
A: Our air compressors are built to last, with a typical lifespan exceeding 10 years.
Q13. Will you provide some spare parts for the machines?
A: Certainly, we supply necessary spare parts for all our machines, ensuring smooth and uninterrupted operation.
Q14. How about your after-sales service?
A: We offer comprehensive after-sales support, including online installation and commissioning guidance. Additionally, our skilled engineers are available for training and on-site installation assistance.
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