Internal Structure Frontside
Internal Structure Backside
Working Principle
In the realm of air compression, an ideal state would see the power needed for a single-stage pressure transmission equating to that needed for multi-stage compression. However, reality introduces additional power demands due to factors such as coupling transmission power losses, bearing frictional coefficients, and the cooling effects of liquid viscosity. By intelligently reducing the compression ratio at each stage, you can effectively diminish unnecessary power usage. This ensures that the total power required for multi-stage compression remains less than that of a single-stage process.
The two-stage screw air compressor is ingeniously structured with a two-stage rotary screw system, featuring an active screw intricately paired with a passive screw. Through an external power transmission, the active screw initiates the passive screw's rotation. At the first stage, a low-pressure rate screw group sets the process in motion, followed by a high-pressure rate screw group in the second stage. Each screw is enveloped by a sealing air film. As the screws spin, the gas undergoes a dynamic trio of processes: suction, pressurization, and exhaust, optimizing efficiency.
First stage compression: Initiating the dual-stage process, the first stage employs a low-pressure rate screw group where gas is adeptly maneuvered into the screw compression chamber via the suction valve. Here, under the relentless high-speed rotation of the screw rotor, the gas is deftly compacted and propelled forward to the second stage, ready for intensified compression.
Second stage compression: Stepping into the second stage, the gas encounters a more confined screw space, where it is subjected to heightened temperature and pressure. This intense compression culminates in the opening of the exhaust valve, effectively expelling the high-pressure gases from the system, marking a pivotal moment in the compression journey.
The process begins as natural air is drawn through the air filter into the first compression stage, where it merges with a subtle amount of lubricating oil within the chamber. Together, they are compressed to interstage pressure. Post-compression, the gas journeys through a cooling channel, encountering abundant oil mist which significantly cools the compressed mixture. This rejuvenated gas then advances to the second-stage rotor for further compression, reaching the final exhaust pressure. The journey culminates as the compressor discharges the fully compressed gas via the exhaust valve, completing an efficient and seamless compression cycle.
Water-cooled compressors harness the power of water as a cooling medium to achieve superior functionality. As the cooling water circulates within the air compressor, it not only cools but also cleans, enhancing lubrication and significantly extending the lifespan of friction-prone components. During operation, the cooling water effectively transfers heat away from the cylinder and compressed gas, resulting in reduced exhaust temperatures and lower power consumption. This translates into decreased operational costs for the air compressor. However, it's crucial to remain vigilant about potential scaling issues within the water cooling system.
1) Unmatched Efficiency of PM Motor: The permanent magnet motor boasts an expansive range of constant torque and weak magnetic capabilities. It outperforms regular motors with efficiency levels that are 20-30% higher. Remarkably, its efficiency remains stable even when the motor operates outside of the rated frequency, consistently delivering exceptional motor performance.
2) Maintenance-Free Motor Design: Featuring a design devoid of internal bearings, the permanent magnet motor eliminates the costs associated with bearing maintenance and replacement, offering a hassle-free experience.
3) Sophisticated Integrated Frequency Converter: Utilizing China's premier frequency system, this solution provides an extensive speed regulation range with high precision. It dynamically adjusts the operation frequency in response to actual gas demands, resulting in exceptional energy-saving outcomes for the air compressor.
4) Eliminated Transmission Loss: The permanent magnet motor and compressor are ingeniously combined through an embedded integrated shaft direct connection. This compact structural innovation eliminates couplings and other transmission components, ensuring a flawless 100% transmission efficiency.
5) Gentle Variable Frequency and Soft Start capabilities of the motor significantly diminish the impact on power grid equipment, preventing any potential harm to electrical systems and ensuring smooth operations.
6) Optimized Energy Usage: With a frequency conversion range spanning from 25% to 100% (in contrast to the standard 50% to 100%), this system delivers energy savings of over 30% compared to fixed-speed air compressors. Furthermore, it offers approximately 5% more efficiency than ordinary variable frequency air compressors. The greater the fluctuation in system gas consumption, the more pronounced the energy-saving benefits.
7) Distinctive Two-Stage Compression Air End: Innovatively designed, the two-stage compression screw machine integrates the first and second-stage compression rotors within a single casing. Driven directly by gears, each rotor stage achieves optimal linear speed, resulting in enhanced compression efficiency.
8) Innovative Internal Spray Curtain Cooling: This cutting-edge cooling technique offers significant energy savings, effectively reducing compressed air temperatures and achieving near-isothermal compression. It also minimizes pressure loss between stages, lowers the compression ratio, and enhances overall compression efficiency.
9) Minimized Internal Leakage: By incorporating two-stage compression, the system reduces the compression ratio for each stage, limiting internal leakage from the high-pressure end to the low-pressure end, thereby boosting volumetric efficiency.
10) Enhanced Noise Reduction: The use of two-stage compression lowers the compression ratio, significantly reducing operational noise, particularly during unloading.
11) Simplified Maintenance and Serviceability: The two-stage compressor unit, with systems and structures mirroring those of single-stage compression (aside from the screw air end), ensures user-friendly maintenance and operation, providing ease and convenience for users.
1. Price Advantage
Experience unbeatable value with our direct factory prices, designed to give our customers a competitive edge in the marketplace.
2. Direct Deal
Enjoy the benefits of direct factory sourcing, ensuring that you receive the most cost-effective products without middlemen.
3. OEM & ODM Services
Our factory boasts robust production and management capabilities, offering top-notch OEM and ODM services tailored to your needs.
4. Customized Service
We welcome non-standard and export orders, offering customizable options in voltage, power, pressure, and more. Please reach out to us with your specific requirements.
5. Accept Small Order
Initiate a small trial order to evaluate the superior quality of our offerings, providing you peace of mind before larger commitments.
6. Fast Delivery
Count on us for high-quality products delivered with prompt efficiency, meeting your timelines seamlessly.
7. Complete Authorization
Authorized distributors are empowered with comprehensive certification, enabling you to sell SANZHI branded products with confidence.
Sanzhi (Henan) Compressor Co., Ltd, an esteemed manufacturer, proudly stands at the forefront of screw air compressor and vacuum pump production with over a decade of industry experience. Our expansive product lineup features cutting-edge normal and low-pressure screw air compressors, innovative permanent magnet frequency conversion screw air compressors, and advanced two-stage compression screw air compressors. Catering to diverse needs, we also offer specialized compressors for laser cutting, versatile single-tank and double-tank mobile screw air compressors, as well as robust electric and diesel mobile screw air compressors. Our portfolio is completed with the efficient screw vacuum pump, ensuring comprehensive solutions for all your air compression requirements.
Our production prowess is highlighted by state-of-the-art multi-air compressor assembly lines, designed for maximum efficiency through lean, modern practices. With a dedicated team of over 50 skilled employees, we continuously enhance our management systems, incorporating ERP solutions to minimize lead times and expedite the delivery of our high-quality products.
Our commitment to quality is unwavering, as evidenced by our ISO9001 quality management system certification. We rigorously adhere to stringent quality protocols, meticulously executing material inspections, production checks, and pre-delivery inspections to ensure each machine meets our exacting standards before it leaves our facility.
In customer service, we excel in providing expert pre-sales guidance, assisting customers in selecting the perfect air equipment tailored to their specific facility needs. We offer high levels of customization, including unique appearances and configurations, and specialize in OEM production to fulfill dealer-specific demands. Post-sale, our highly trained sales and service team is always ready to respond swiftly to our customers' needs, ensuring a seamless experience.
At Sanzhi (Henan) Compressor Co., Ltd, we are committed to delivering outstanding, reliable products and cultivating enduring relationships with our valued clients. Our promise of efficient delivery, top-notch machines, and competitive pricing positions us as your trusted partner in providing the ultimate compressed air solutions.
Our state-of-the-art factory is strategically situated in the vibrant Xinzheng City, Henan Province, China. For your convenience, we offer transport from Xinzheng International Airport to our factory, a scenic 30-kilometer journey taking approximately one hour. We warmly invite you to visit our company and experience our hospitality firsthand!
Frequently Asked Questions (FAQ)
Q1. Are you a trading company or manufacturer?
A: We are a distinguished manufacturer specializing in screw air compressors, boasting over a decade of industry expertise.
Q2. How do you control quality?
A: 1. Raw materials undergo meticulous inspection.
2. Installation processes are rigorously controlled to ensure excellence.
3. Each machine is subjected to a minimum of 5 hours of rigorous continuous testing before dispatch.
Q3. What information must I provide to get the suitable machine?
1. Specify the required air delivery capacity (Unit: CFM or m³/Min).
2. Indicate the desired working pressure (Unit: PSI, Bar or Mpa).
3. Provide the voltage and frequency specifications of your locale (V/Hz).
4. Specify if additional accessories are needed, such as an air tank, filters, and/or air dryers.
Share these details with us, and we will craft a tailored solution for you!
Q4. What is the general unit conversion?
1Bar = 0.1Mpa = 14.5PSI - Your quick guide to pressure conversion.
1m³/min = 35.32cfm - Converts effortlessly for your needs.
1KW = 1.34HP - Precision in power conversion.
Q5. What is the available voltage air compressor?
A: Sanzhi offers versatile voltage options including 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, 440v/60hz/3p, with customization available to suit your requirements.
Q6. How long is the delivery time?
A: For standard voltage, delivery is within 15 working days post order confirmation. For non-standard orders, please liaise with our sales team.
Q7. What's the payment term?
A: Our payment terms are structured as follows: 30% T/T in advance, 40% T/T preceding shipment, and 30% T/T upon receipt of the B/L copy. Payments accepted in USD and RMB.
Q8. How about your warranty?
A: We offer a comprehensive warranty of one year for the entire machine and two years for the screw air compressor, excluding consumable spare parts.
Q9. What about the maintenance?
A: Initial maintenance is required after 500 operational hours, followed by regular maintenance every 2000-3000 hours, contingent on the environment.
Q10. Can machines be run in high-temperature environment?
A: Absolutely, our machines are engineered to operate efficiently in high-temperature environments, sustaining temperatures from -20° to 45°(-4ºF-113ºF).
Q11. Do you offer OEM service?
A: Yes, indeed! With our expert design team, OEM & ODM orders are warmly welcomed.
Q12. How long could your air compressor be used?
A: Typically, our air compressors are designed to serve reliably for over 10 years.
Q13. Will you provide some spare parts for the machines?
A: Certainly, we are committed to providing spare parts to support your machine's longevity.
Q14. How about your after-sales service?
A: We deliver comprehensive after-sales service including online installation and commissioning guidance, with our engineers available to assist with training and installation.
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