Internal Structure - Frontside
Internal Structure - Backside
Working Principle
In an ideal air compression scenario, the power required for single-stage compression is equal to the power required for multi-stage compression. However, real-world inefficiencies such as coupling transmission power loss, bearing friction, and the cooling effect of liquid viscosity lead to higher actual working power. By reducing the compression ratio at each stage, the total power necessary for multi-stage compression is minimized compared to single-stage compression. This approach effectively mitigates these inefficiencies, resulting in significant energy savings.
The two-stage screw air compressor is engineered with a dual-stage rotary screw mechanism. Each stage comprises an active and a passive screw, with the active screw driving the passive screw via an external power transmission device. The first stage incorporates a low-pressure rate screw group, while the second stage utilizes a high-pressure rate screw group. A sealing air film encases each screw, facilitating gas compression through three phases: suction, pressurization, and exhaust.
First Stage Compression: This initial phase uses a low-pressure rate screw group to compress the gas. The gas is drawn into the screw compression chamber through a suction valve, where it undergoes progressive compression and is then transferred to the second stage by the high-speed rotation of the screw rotor.
Second Stage Compression: During this phase, the gas enters a tighter screw space, experiencing compression at elevated temperatures and pressures. The high-pressure gases are subsequently expelled from the system as the exhaust valve opens, completing the second stage of the compression process.
Natural air is filtered before entering the first compression stage, where it mixes with a small amount of lubricating oil in the compression chamber. This mixture is compressed to interstage pressure and passes through a cooling channel, encountering a substantial amount of oil mist to significantly reduce its temperature. The cooled gas then proceeds to the second-stage rotor for further compression and is ultimately expelled through the exhaust valve, finalizing the entire air compression process.
Water-cooled compressors leverage the exceptional cooling power of water for improved lubrication and extended lifespan of wear-prone components. As the cooling water circulates, it effectively cleans internal parts and dissipates heat from both the cylinder and compressed gas. This efficient process significantly lowers exhaust temperature and power consumption, leading to substantial operational cost savings. However, it's vital to monitor and address potential scaling issues within the water cooling system to ensure peak performance.
1) Superior Efficiency of PM Motor:Our cutting-edge permanent magnet motor offers a wide constant torque and weak magnetic range, boosting efficiency by an impressive 20-30% over traditional motors. Even when not running at the rated frequency, it maintains constant efficiency, ensuring unparalleled motor performance.
2) Maintenance-Free Motor:Ingeniously designed without internal bearings, our permanent magnet motor eliminates the need for costly and time-consuming maintenance and bearing replacements, guaranteeing a hassle-free experience.
3) Integrated Frequency Converter:Equipped with China's leading frequency system, this unit offers a vast speed regulation range and exceptional precision. It adapts seamlessly to the user's actual gas needs, delivering substantial energy-saving benefits for the air compressor.
4) Zero Transmission Loss:Featuring an integrated shaft structure that directly connects the permanent magnet motor and compressor, this design eliminates couplings and other transmission parts, achieving a perfect transmission efficiency of 100%.
5) Variable Frequency and Soft Start:Our motor executes variable frequency start and soft start, dramatically reducing the impact on power grid equipment and preventing potential damage to electrical components.
6) Enhanced Energy Efficiency:With a frequency conversion range of 25% to 100%-compared to the standard range of 50% to 100%-our system offers over 30% energy savings relative to fixed-speed compressors. Additionally, it saves about 5% more energy than standard variable frequency compressors, with greater savings realized during significant fluctuations in system gas consumption.
7) Unique Two-Stage Compression Air End:Our two-stage compression screw machine features a uniquely engineered air end, integrating both first-stage and second-stage compression rotors within a single casing. These rotors rotate through gears to achieve optimal linear speed for each stage, significantly boosting compression efficiency.
8) Innovative Internal Spray Curtain Cooling:Our cutting-edge internal spray curtain cooling method delivers exceptional cooling performance. It notably lowers the temperature of compressed air, approaching isothermal compression, and reduces pressure loss between stages, thereby enhancing compression efficiency.
9) Minimized Internal Leakage:Employing a two-stage compression method reduces the compression ratio of each stage, thereby minimizing internal leakage from high-pressure to low-pressure ends and enhancing volumetric efficiency.
10) Noise Reduction:The two-stage compression design significantly reduces the compression ratio, resulting in a marked reduction in operational noise, especially during unloading.
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 straightforward maintenance and user convenience.
1. Unmatched Price Advantage
We offer direct ex-factory pricing, empowering our customers with a competitive edge, ensuring you get the best value for your investment.
2. Direct Deal Benefits
Our products are supplied directly from the factory, ensuring you receive the most cost-effective solutions with no middlemen involved.
3. Comprehensive OEM & ODM Services
Our robust production and management capabilities enable us to provide exceptional OEM/ODM services tailored uniquely to your needs, ensuring high performance and reliability.
4. Bespoke Customisation Services
We accept non-standard and export orders, customizing voltage, power, pressure, and more to meet your specific requirements. Reach out to us for bespoke solutions.
5. Small Order Acceptance
Test the excellence of our products by placing a small trial order first, experiencing our quality and service upfront.
6. Expedited Delivery
Experience the combination of high-quality products and prompt delivery, ensuring your operations continue without delay.
7. Comprehensive Authorization
For our distributors, we provide full authorization certificates, enabling you to sell our SANZHI brand products with the utmost confidence and legitimacy.
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ABOUT US
Sanzhi (Henan) Compressor Co., Ltd, with over a decade of industry expertise, is a distinguished leader in the manufacturing of screw air compressors and vacuum pumps. Our comprehensive product range includes cutting-edge screw air compressors and vacuum pumps designed for a variety of applications. We offer normal pressure/low-pressure screw air compressors, permanent magnet frequency conversion models, two-stage compression units, specialized screw air compressors for laser cutting, as well as single-tank and double-tank mobile screw air compressors. Additionally, we provide electric and diesel mobile screw air compressors and advanced screw vacuum pumps, ensuring we meet all your air and vacuum needs.
Our advanced assembly lines enable efficient and precise manufacturing processes. Supported by a dedicated team of over 50 employees, we leverage sophisticated management systems such as ERP, significantly reducing lead times and guaranteeing the timely delivery of our top-tier products.
Our factory proudly maintains ISO9001 quality management system certification. We uphold rigorous quality standards through comprehensive control processes. Each machine is meticulously inspected, from material checks and production assessments to pre-delivery evaluations, ensuring that only the highest quality products reach our customers.
Our exceptional customer service begins with pre-sales consultation, where we provide expert advice to help you choose the perfect air equipment for your specific requirements. We offer extensive customization options in both appearance and configuration, along with OEM services to fulfill unique dealer demands. Our professional sales and service team ensures swift and effective after-sales support, guaranteeing maximum customer satisfaction.
At Sanzhi (Henan) Compressor Co., Ltd, our commitment to excellence drives us to deliver stable, superior products and cultivate long-lasting customer relationships. With our competitive pricing, efficient delivery, and premium machines, we are your trusted partner for all-encompassing compressed air solutions.
Our factory is strategically located in Xinzheng City, Henan Province, China, just 30 kilometers from Xinzheng International Airport. We provide complimentary pick-up services for visitors, making it convenient for you to visit our facility. We eagerly await your visit!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a seasoned manufacturer, specializing in screw air compressors with over 10 years of industry experience.
Q2. How do you control quality?
A: 1. We conduct rigorous inspections on all raw materials.
2. Our installation procedures are meticulously controlled.
3. Each machine undergoes a minimum of 5 hours of continuous testing to ensure optimal performance before it leaves our factory.
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 configurations, your order will be expediently processed within a brisk 15 working days post-confirmation. For non-standard specifications, please contact our sales team to receive a detailed timeline tailored to your needs.
Q7. What's the payment term?
A: Our payment terms are structured as follows: a 30% T/T advance payment, an additional 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 provide a comprehensive one-year warranty covering the entire machine, along with an extended two-year warranty specifically for the screw air compressor, excluding consumable spare parts.
Q9. What about the maintenance?
A: The initial maintenance should be performed after 500 hours of operation. Subsequent maintenance should be conducted every 2000-3000 hours, adjusted based on the actual working environment.
Q10. Can machines be run in high-temperature environments?
A: Absolutely. Our machines are engineered to operate efficiently in high-temperature environments, with a working temperature range extending 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, supported by our professional design team. Custom orders are highly welcome.
Q12. How long could your air compressor be used?
A: Typically, our air compressors boast a lifespan exceeding 10 years.
Q13. Will you provide some spare parts for the machines?
A: Certainly. We ensure the provision of spare parts for your machines.
Q14. How about your after-sales service?
A: We deliver comprehensive after-sales support, encompassing online instructions for installation and commissioning. Additionally, our engineers are available for training and installation assistance.
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