Internal Structure - Frontside
Internal Structure - Backside
Working Principle
In an ideal air compression scenario, the power required for single-stage pressure transmission equals the sum needed for multi-stage compression. However, in real-world applications, actual operational power increases due to inefficiencies such as power loss from coupling, bearing friction, and the cooling effects of liquid viscosity. By minimizing the compression ratio at each stage, the total power for multi-stage compression can be reduced compared to single-stage compression, effectively diminishing these inefficiencies.
The two-stage screw air compressor boasts a dual-stage rotary screw mechanism, featuring both active and passive screws. The active screw drives the passive one through an external power transmission device. The first stage uses a low-pressure screw group, while the second stage employs a high-pressure screw group. Each screw operates within an airtight seal. During rotation, the gas undergoes three stages of compression: suction, pressurization, and exhaust.
First Stage Compression: The initial stage employs a low-pressure screw group to compress the gas. Gas enters the compression chamber through the suction valve. Under 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 enters a more confined screw space where it undergoes further compression at higher temperatures and pressures. The exhaust valve opens to release the high-pressure gas, completing the compression cycle.
Natural air is meticulously filtered before entering the first stage of compression, where it mixes with a small amount of lubricating oil in the compression chamber. This mixture is compressed to interstage pressure. The compressed gas then passes through a cooling channel and encounters a significant amount of oil mist, reducing its temperature. The cooled gas proceeds to the second-stage rotor for further compression and is ultimately expelled through the exhaust valve, completing the entire compression process.
Water-cooled compressors harness the exceptional thermal management capabilities of water to boost performance. As cooling water courses through the air compressor, it meticulously cleans internal components, amplifies lubrication, and prolongs the lifespan of wear-prone parts. During operation, this water adeptly dissipates heat from both the cylinder and compressed gas, dramatically lowering exhaust temperatures and power usage, thus slashing operational costs. Users must, however, be vigilant about potential scaling issues in the water cooling system.
1) Unmatched Efficiency of PM Motor:Our cutting-edge permanent magnet motor features an extensive constant torque and weak magnetic range, delivering 20-30% higher efficiency compared to traditional motors. It maintains consistent efficiency even when operating away from the rated frequency, ensuring unsurpassed motor performance.
2) Maintenance-Free Motor:Designed without internal bearings, our permanent magnet motor eradicates the need for costly maintenance and bearing replacements, ensuring seamless, trouble-free operation.
3) Integrated Frequency Converter:Outfitted with China's premier frequency system, this unit boasts a broad speed regulation range and exceptional precision. It tailors itself to the user's actual gas demand, delivering extraordinary energy-saving advantages for the air compressor.
4) Zero Transmission Loss:With a unified shaft structure directly linking the permanent magnet motor to the compressor, this innovative design eliminates couplings and other transmission parts, achieving an impeccable 100% transmission efficiency.
5) Variable Frequency and Soft Start:Our motor enables variable frequency and soft start, significantly decreasing the impact on power grid equipment, thereby safeguarding electrical components from damage.
6) Enhanced Energy Efficiency:Boasting a frequency conversion range of 25% to 100% (versus the standard 50% to 100%), this system achieves over 30% energy savings compared to fixed-speed compressors and approximately 5% more savings compared to conventional variable frequency compressors. Enhanced fluctuations in system gas consumption further magnify these energy-saving benefits.
7) Unique Two-Stage Compression Air End:Our two-stage compression screw machine features a singularly designed air end, merging both first and second-stage compression rotors within one casing. Through gear rotation, it achieves the ideal linear speed for each stage, significantly enhancing compression efficiency.
8) Innovative Internal Spray Curtain Cooling:Our pioneering internal spray curtain cooling technique offers exceptional cooling performance, significantly lowering compressed air temperatures to near isothermal compression, and minimizing pressure loss between stages to boost overall compression efficiency.
9) Minimized Internal Leakage:By employing two-stage compression, we reduce the compression ratio of each stage, thereby decreasing internal leakage from high to low-pressure ends, enhancing volumetric efficiency.
10) Noise Reduction:The two-stage compression mechanism reduces the compression ratio, notably lowering operational noise, especially during unloading phases.
11) Simplified Maintenance and Service:Aside from the screw air end, our two-stage compressor unit retains structures and systems akin 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.
2. Direct Deal Benefits
Our products are supplied directly from the factory, ensuring you receive the most cost-effective solutions.
3. Comprehensive OEM & ODM Services
Our robust production and management capabilities enable us to provide exceptional OEM/ODM services tailored to your needs.
4. Bespoke Customisation Services
We accept non-standard and export orders, and can customize voltage, power, pressure, etc. Reach out to us with your specific requirements.
5. Small Order Acceptance
Test the excellence of our products by placing a small trial order first.
6. Expedited Delivery
Experience the combination of high-quality products and prompt delivery.
7. Comprehensive Authorization
For our distributors, we provide full authorization certificates, empowering you to sell our SANZHI brand products with confidence.
About us
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 specifications, your order will be processed within a swift 15 working days upon confirmation. For non-standard specifications, kindly reach out to our dedicated sales team for detailed timelines and personalized assistance.
Q7. What's the payment term?
A: Our payment terms are structured for your convenience: 30% T/T upfront, 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.
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. This ensures your peace of mind and operational reliability.
Q9. What about the maintenance?
A: The initial maintenance for our compressors should be conducted after the first 500 hours of operation. Thereafter, regular maintenance is required every 2000-3000 hours, which can be adjusted based on the actual working environment to ensure optimal performance.
Q10. Can machines be run in high-temperature environment?
A: Absolutely! Our machines are meticulously engineered to operate efficiently in high-temperature environments. They are designed to function flawlessly within a working temperature range of -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. Your custom orders are highly valued and we are committed to bringing your unique visions to life.
Q12. How long could your air compressor be used?
A: Our air compressors are built to last, with a typical lifespan exceeding 10 years, ensuring long-term reliability and performance.
Q13. Will you provide some spare parts for the machines?
A: Certainly, we provide essential spare parts for your machines to ensure they remain operational with minimal downtime.
Q14. How about your after-sales service?
A: We offer comprehensive after-sales support which includes detailed online instructions for installation and commissioning. Additionally, our expert engineers are available to provide training and on-site installation assistance, ensuring smooth and efficient operations.
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