Internal Structure Frontside
Internal Structure Backside
Working Principle
In the realm of ideal air compression processes, the energy required for single-stage pressure transmission mirrors that of multi-stage compression. However, real-world compression introduces factors such as coupling power loss, bearing friction, and liquid viscosity cooling effects, which increase the actual working power. By lowering the compression ratio at each stage, the total power required for multi-stage compression can be minimized, making it more efficient than single-stage compression.
A marvel of engineering, the two-stage screw air compressor is structured with a dual rotary screw system, each stage featuring an active and a passive screw. The active screw utilizes an external power transmission device to drive the passive screw. In the initial phase, a low-pressure screw group initiates compression, followed by a high-pressure group in the subsequent stage. Encased in a protective air film, each screw efficiently compresses gas through a precise cycle of suction, pressurization, and exhaust.
First Stage Compression: Initiating the compression process, the two-stage screw air compressor's low-pressure screw group efficiently captivates the incoming gas. The gas is admitted into the compression chamber via the suction valve, where the high-speed rotation of the screw rotor methodically compresses it, transferring the compact gas seamlessly to the second stage.
Second Stage Compression: Herein lies the heart of high-efficiency compression. The second stage screw group compresses the gas within a more confined space, significantly elevating both temperature and pressure. Upon reaching optimal conditions, the exhaust valve opens, facilitating the swift removal of high-pressure gases from the system.
Through a meticulous journey, natural air embarks on its compression adventure, initially drawn in through the air filter. This air harmonizes with a touch of lubricating oil within the compression chamber as it undergoes initial compression. Passing into the cooling channel, it's bathed in an oil mist that reduces temperature significantly. Entering the second-stage rotor, the air experiences a final compression, culminating in its release at peak exhaust pressure, thus completing the compressor's efficient cycle.
Water-cooled compressors ingeniously utilize water as their cooling medium. As this cooling water flows through the compressor, it performs a pivotal cleaning function, enhancing lubrication and prolonging the lifespan of friction-wearing components. During operation, this cooling water efficiently absorbs and dissipates part of the heat generated by the cylinder and compressed gas, significantly reducing exhaust temperature and power consumption, and thereby lowering operational costs. However, diligent attention is needed to address potential scaling issues within the water cooling system, ensuring its efficiency and longevity.
1) Elevate Your Efficiency with PM Motor: Experience superior efficiency with our permanent magnet motor, boasting a wider constant torque and weak magnetic range. This motor outshines regular motors by 20-30% in efficiency. Remarkably, even when operating away from its rated frequency, it maintains exceptionally high performance, ensuring consistently optimal motor efficiency.
2) Enjoy Hassle-Free Motor Maintenance: Our advanced permanent magnet motor is engineered without internal bearings, effectively eliminating any costs related to motor bearing maintenance and replacement, providing you with a truly maintenance-free experience.
3) Sophisticated Integrated Frequency Converter: Embrace cutting-edge technology with our top-of-the-line Chinese frequency system, offering an extensive range of speed regulation with high precision. Tailored to adjust frequency based on the user's actual gas demand, this system delivers extraordinary energy-saving results for your air compressor.
4) Achieve Zero Transmission Loss: Our innovative design integrates the permanent magnet motor and compressor with a direct-connected embedded shaft structure, resulting in a more compact configuration. With no couplings or other transmission components, we ensure 100% transmission efficiency.
5) Experience Smooth Variable Frequency Start and Soft Start: Motor starts are seamlessly realized with variable frequency and soft start mechanisms, greatly reducing impact on power grid equipment and preventing any damage to electrical systems.
6) Minimize Energy Consumption: Our frequency conversion ranges from 25% to 100%, compared to the standard 50% to 100% range. This allows for over 30% energy savings compared to fixed-speed air compressors. In comparison to ordinary variable frequency compressors, energy savings reach around 5%. The greater the fluctuation in system gas consumption, the more pronounced the energy-saving effects become.
7) Innovative Two-Stage Compression Unique Air End: Our two-stage compression screw machine features a uniquely designed air end, incorporating first-stage and second-stage compression rotors within a single casing. These rotors are directly driven by gears, ensuring each stage achieves optimal linear speed and maximum compression efficiency.
8) Efficient Internal Spray Curtain Cooling Method: Leverage our high-energy-saving internal spray curtain cooling method for outstanding cooling effects. This significantly reduces the temperature of compressed air, achieving near-isothermal compression, while also minimizing pressure loss between stages, lowering the compression ratio, and enhancing overall compression efficiency.
9) Drastically Reduce Internal Leakage: With our two-stage compression approach, each compression cycle's ratio is minimized, thus reducing internal leakage from high-pressure to low-pressure ends, resulting in improved volume efficiency.
10) Enjoy Quiet Operations with Noise Reduction: Our two-stage compression mechanism lowers the compression ratio, which significantly diminishes noise levels, especially during unloading, for a quieter operation.
11) Simplified Maintenance and Service: The two-stage compressor unit retains similar systems and structures to single-stage compression, apart from the screw air end. This familiarity ensures convenience in maintenance and ease of use for our valued users.
1. Exceptional Price Advantage
We provide our esteemed customers with direct-from-factory prices, ensuring you maintain a strong competitive edge in the market.
2. Seamless Direct Dealings
All our outstanding products are delivered straight from the factory, allowing us to offer you even more cost-effective solutions.
3. OEM & ODM Excellence
Leverage our factory's robust production and management capabilities to avail of unparalleled OEM/ODM services tailored for you.
4. Tailored Customisation Service
We welcome non-standard and export orders, with customizations in voltage, power, and pressure available. If you have specific needs, please reach out to us.
5. Welcoming Small Orders
Experience the quality of our products firsthand by placing a small trial order to assure your satisfaction.
6. Swift and Reliable Delivery
Receive our high-quality products with the assurance of timely and efficient delivery.
7. Comprehensive Authorization
For our distributors, we provide complete authorization certificates, empowering you to sell our prestigious SANZHI brand products with confidence.
Sanzhi (Henan) Compressor Co., Ltd. stands as a leading manufacturer specializing in the production of screw air compressors and screw vacuum pumps, boasting over a decade of expertise. Our diverse product portfolio encompasses normal pressure/low-pressure screw air compressors, cutting-edge permanent magnet frequency conversion screw air compressors, advanced two-stage compression screw air compressors, specialized screw air compressors for laser cutting, versatile single-tank mobile screw air compressors, robust double-tank mobile screw air compressors, reliable electric mobile screw air compressors, durable diesel mobile screw air compressors, and high-performance screw vacuum pumps, among other innovations.
In the realm of production, we harness the power of modernity and efficiency through our lean multi-air compressor assembly lines. Our dynamic team of over 50 dedicated employees is committed to continually optimizing management systems such as ERP, significantly reducing lead times, and ensuring the rapid delivery of impeccable products.
In terms of management, our factory proudly holds the esteemed ISO9001 quality management system certification. We are unwavering in our commitment to stringent quality management practices, meticulously adhering to standard quality control processes. Each machine that leaves our facility undergoes comprehensive inspections, including material checks, production evaluations, and pre-delivery assessments.
In the domain of customer service, our pre-sales team excels in providing expert guidance, helping customers select the ideal air equipment tailored to their specific needs, with extensive customization options, including appearance and configuration. Our ability to fulfill unique demands, such as OEM products, sets us apart. For after-sales support, our highly skilled sales and service team is poised for rapid response, ensuring customer satisfaction and peace of mind.
At Sanzhi (Henan) Compressor Co., Ltd., we are passionately committed to delivering superior, stable products, forging long-lasting partnerships with our valued customers. With efficient delivery, top-quality machines, and competitive pricing, we stand as a trusted provider of exceptional compressed air solutions.
Our state-of-the-art factory is strategically located in Xinzheng City, Henan Province, China, just a convenient 30-kilometer journey from Xinzheng International Airport. We warmly welcome you to visit us and experience firsthand the excellence we offer!
Frequently Asked Questions
Q1. Are you a trading company or a manufacturer?
A: We proudly stand as a dedicated manufacturer of screw air compressors, boasting over 10 years of unparalleled expertise in the field.
Q2. How do you ensure quality control?
A: 1. Each raw material undergoes a rigorous inspection process to uphold our high standards.
2. Our installation procedures are meticulously regulated to ensure excellence.
3. Every machine is subjected to a minimum of 5 hours of continuous, rigorous testing before it is approved to leave the factory.
Q3. What information do I need to provide to receive the ideal machine?
1. Specify the air delivery capacity you require (Unit: CFM or m³/Min).
2. Indicate the working pressure needed (Unit: PSI, Bar, or Mpa).
3. Provide the voltage and frequency specifications for your country of residence (V/Hz).
4. Inform us if additional accessories are required, such as an air tank, filters, and/or air dryers.
Share these details with us, and we'll craft the perfect solution tailored just for you!
Q4. Can you explain the general unit conversions?
1Bar is equivalent to 0.1Mpa or 14.5PSI.
1m³/min equates to 35.32cfm.
1KW converts to 1.34HP.
Q5. What are the available voltage options for air compressors?
A: Sanzhi offers air compressors in multiple voltage options including 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, 440v/60hz/3p, and they can be customized as per your specific requirements.
Q6. What is the typical delivery time?
A: For standard voltages, delivery is assured within 15 working days post order confirmation. For non-standard specifications, kindly consult our sales team.
Q7. What are the payment terms?
A: We accept 30% T/T upfront, 40% T/T prior to shipment, and the remaining 30% T/T upon receipt of the B/L copy. Payments can be made in USD or RMB.
Q8. What warranty do you offer?
A: Our warranty covers one year for the entire machine and extends to two years for the screw air compressor, excluding consumable spare parts.
Q9. How is maintenance handled?
A: The first maintenance is due after 500 hours of operation, with subsequent maintenance every 2000-3000 hours, adjusted based on the operational environment.
Q10. Can the machines operate in high-temperature environments?
A: Absolutely! Our machines are engineered to function efficiently in high-temperature regions, with a working temperature range from -20° to 45°(-4ºF-113ºF).
Q11. Do you provide OEM services?
A: Certainly! With our skilled design team, we enthusiastically welcome both OEM and ODM orders to meet your unique requirements.
Q12. What is the expected lifespan of your air compressor?
A: Typically, our air compressors are crafted to last over a decade.
Q13. Do you supply spare parts for your machines?
A: Yes, we are committed to providing spare parts for our machines as needed.
Q14. What kind of after-sales service do you offer?
A: We offer comprehensive after-sales services including online guidance for installation and commissioning, and our engineers are available to provide training and support with installation.
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