Internal Structure - Frontside
Internal Structure - Backside
Working Principle
In an ideal air compression scenario, the power needed for single-stage compression is theoretically equal to that needed for multi-stage compression. However, in practical situations, the working power required increases due to inefficiencies such as coupling transmission power loss, bearing friction, and liquid viscosity cooling effects. By lowering the compression ratio at each stage, the total power consumed for multi-stage compression can be significantly less than that for single-stage compression, thus effectively reducing these losses.
Our two-stage screw air compressor is engineered with a dual-stage rotary screw mechanism. Each stage has an active and a passive screw, with the active screw powering the passive screw via an external power transmission system. The first stage is designed with a low-pressure screw group, while the second stage features a high-pressure screw group. Both screws are enveloped in a sealing air film. As they revolve, the gas undergoes a three-phase cycle of suction, compression, and exhaust.
First Stage Compression: The initial phase utilizes a low-pressure screw group, compressing the gas as it enters the screw compression chamber through the suction valve. Driven by the high-speed rotation of the screw rotor, the gas is progressively compressed and transferred to the second stage.
Second Stage Compression: In this stage, the gas moves into a tighter screw space where it undergoes compression at higher temperatures and pressures. The exhaust valve then opens, releasing the high-pressure gas from the system.
Natural air is meticulously filtered before entering the first stage of compression, where it blends with a small amount of lubricating oil in the compression chamber. This mixture is compressed to the interstage pressure. The resulting compressed gas passes through a cooling channel, encountering a substantial oil mist that significantly reduces its temperature. The cooled gas then proceeds to the second-stage rotor, where it is further compressed and ultimately expelled through the exhaust valve, completing the entire compression process.
Water-cooled compressors harness the remarkable cooling power of water. As the cooling water circulates through the air compressor, it not only enhances lubrication by cleansing internal components but also extends the lifespan of friction-prone parts. Throughout compressor operation, the cooling water efficiently dissipates heat from the cylinder and compressed gas, significantly lowering exhaust temperature and power consumption. This results in a substantial reduction in operational costs. Nevertheless, attention must be given to the potential challenges of scaling within the water cooling system.
1) Superior Efficiency of PM Motor:Our state-of-the-art permanent magnet motor boasts a broader constant torque and weak magnetic range. Its efficiency surpasses traditional motors by 20-30%. Remarkably, when operating outside the rated frequency, it maintains consistent efficiency, assuring unparalleled motor performance.
2) Maintenance-Free Motor:Engineered with no internal bearings, the permanent magnet motor eliminates the necessity for costly maintenance and bearing replacements, enhancing reliability and reducing downtime.
3) Integrated Frequency Converter:Employing China's premier frequency system, this unit offers an extensive speed regulation range with high precision. It dynamically adjusts to the user's actual gas demand, delivering impressive energy-saving benefits for the air compressor.
4) Zero Transmission Loss:Featuring an integrated shaft structure, the permanent magnet motor and compressor are directly connected and more compact. With no coupling or other transmission parts, transmission efficiency is maximized at a flawless 100%.
5) Variable Frequency and Soft Start:This motor excels in variable frequency start and soft start, significantly minimizing the impact on power grid equipment and preventing potential damage to electrical components.
6) Enhanced Energy Efficiency:With a frequency conversion range from 25% to 100% (compared to the ordinary range of 50% to 100%), this system offers over 30% energy savings compared to fixed speed compressors. Even when compared to standard variable frequency compressors, it saves approximately 5% more energy. Greater fluctuations in system gas consumption only amplify these energy-saving benefits.
7) Unique Two-Stage Compression Air End:Our two-stage compression screw machine features a uniquely designed air end. It seamlessly integrates both first-stage and second-stage compression rotors within a single casing, rotating them through gears to achieve optimal linear speed for each stage, thereby optimizing compression efficiency.
8) Innovative Internal Spray Curtain Cooling:Our advanced internal spray curtain cooling method offers superior cooling performance. It significantly lowers the temperature of compressed air, closely approximating isothermal compression, and reduces pressure loss between stages to enhance compression efficiency.
9) Minimized Internal Leakage:By adopting two-stage compression, the compression ratio of each stage is reduced, effectively decreasing internal leakage from high-pressure to low-pressure ends, thereby boosting volumetric efficiency.
10) Noise Reduction:The two-stage compression mechanisms lower the compression ratio, dramatically reducing operational noise, especially during unloading phases, creating a quieter working environment.
11) Simplified Maintenance and Service:The two-stage compressor unit, apart from the screw air end, retains similar systems and structures to single-stage compressors, ensuring ease of maintenance and user convenience.
1. Unmatched Price Advantage
We offer direct ex-factory pricing, empowering our customers with a competitive edge and unbeatable value.
2. Direct Deal Benefits
Our products are supplied directly from the factory, ensuring you receive the most cost-effective and high-quality solutions.
3. Comprehensive OEM & ODM Services
Our robust production and management capabilities enable us to provide exceptional OEM/ODM services, meticulously tailored to your specific needs.
4. Bespoke Customisation Services
We accept non-standard and export orders and can customize voltage, power, pressure, and more. Reach out to us with your specific requirements for a perfect fit.
5. Small Order Acceptance
Experience the excellence of our products by placing a small trial order first and see the quality for yourself.
6. Expedited Delivery
Enjoy the perfect combination of high-quality products and prompt delivery, ensuring your operations run smoothly.
7. Comprehensive Authorization
For our distributors, we provide full authorization certificates, empowering you to confidently sell our SANZHI brand products.
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, your order will be processed within a swift 15 working days after confirmation. For non-standard specifications, kindly reach out to our sales team for detailed timelines to ensure we meet your requirements effectively.
Q7. What's the payment term?
A: We require an initial 30% T/T upfront, followed by another 40% T/T before shipment, and the final 30% T/T upon receipt of the B/L copy. We accept payments in both USD and RMB for your convenience.
Q8. How about your warranty?
A: We proudly offer a comprehensive one-year warranty for the entire machine and an extended two-year warranty specifically for the screw air compressor, excluding consumable spare parts, ensuring peace of mind and reliability.
Q9. What about the maintenance?
A: The initial maintenance should be conducted after 500 hours of operation. Thereafter, subsequent maintenance is required every 2000-3000 hours, adjusted according to the actual working environment to maintain optimal performance.
Q10. Can machines be run in high-temperature environments?
A: Absolutely, our machines are expertly designed to operate 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 OEM and ODM services, facilitated by our professional design team. Your custom orders are highly welcome, and we are committed to bringing your unique visions to life.
Q12. How long could your air compressor be used?
A: Typically, our air compressors boast a remarkable lifespan exceeding 10 years, promising long-term reliability and efficiency.
Q13. Will you provide some spare parts for the machines?
A: Certainly, we will provide essential spare parts for your machines to ensure uninterrupted service and performance.
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 training and installation assistance to ensure seamless operation.
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