Internal Structure Frontside
Internal Structure Backside
Working Principle
In an ideal air compression scenario, the power needed for single-stage pressure transmission equates to the cumulative power required for multi-stage compression. However, real-world compression factors such as coupling transmission power losses, bearing friction coefficients, and the cooling effect of liquid viscosity contribute to increased actual working power. By reducing the compression ratio for each stage, unnecessary power consumption can be minimized, making the total power required for multi-stage compression less than that for single-stage compression.
The two-stage screw air compressor features a dual-stage rotary screw configuration. Each stage comprises an active and a passive screw, with the active screw driving the passive screw via an external power transmission mechanism. The first stage employs a low-pressure rate screw assembly, while the second stage uses a high-pressure rate screw assembly. A sealing air film envelops each screw, and as they rotate, the gas undergoes three key processes: suction, pressurization, and exhaust.
First Stage Compression: Utilizing a low-pressure rate screw assembly, the two-stage screw air compressor's first stage compresses gas by trapping it between screws. The gas enters the compression chamber through the suction valve, and under the high-speed rotation of the screw rotor, it is progressively compressed and transferred to the second stage.
Second Stage Compression: In the second stage, the gas enters a more confined screw space, where it is compressed at higher temperatures and pressures. The exhaust valve then opens to expel the high-pressure gas from the system.
Natural air is drawn into the first compression stage through an air filter, 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 flows into the cooling channel, where it contacts a substantial amount of oil mist, significantly lowering its temperature. The cooled gas enters the second-stage rotor for further compression to the final exhaust pressure. The entire compression cycle is completed as the gas is expelled through the exhaust valve.
Water-cooled compressors leverage water as the cooling medium, offering both cleaning and lubrication benefits that significantly extend the life of friction-wearing parts. During operation, cooling water helps dissipate heat from the cylinder and compressed gas, effectively lowering exhaust temperatures and power consumption, thereby reducing overall operating costs. However, it's crucial to monitor and manage scaling in the water cooling system to ensure optimal performance.
1) Exceptional Efficiency of PM Motor:The permanent magnet motor boasts a wider constant torque and weak magnetic range, delivering 20-30% higher efficiency compared to regular motors. Even when operating away from the rated frequency, it maintains exceptionally high efficiency, ensuring optimal performance throughout its operation.
2) Maintenance-Free Motor:The permanent magnet motor is designed without internal bearings, eliminating the need for bearing maintenance and replacement, thereby reducing upkeep costs.
3) Integrated Frequency Converter:Utilizing China's premier frequency system, this converter offers a broad speed regulation range and high precision. It adjusts operation based on the user's actual gas demand, resulting in remarkable energy savings for the air compressor.
4) Zero Transmission Loss:Featuring an embedded integrated shaft, the permanent magnet motor and compressor are directly connected, creating a more compact structure. This design eliminates couplings and other transmission parts, ensuring 100% transmission efficiency.
5) Variable Frequency and Soft Motor Start:These features significantly reduce impact on power grid equipment, preventing potential damage to electrical components.
6) Energy Consumption Reduction:With a frequency conversion range from 25% to 100% (compared to 50% to 100% for ordinary frequency conversion), this model offers energy savings of over 30% compared to fixed-speed air compressors. It also outperforms ordinary variable frequency models by around 5%, with greater savings as system gas consumption fluctuates.
7) Unique Dual-Stage Compression Air End:The innovative design of the dual-stage compression screw machine combines the first and second stage compression rotors in a single casing. Each rotor is driven directly by gears, optimizing linear speed and enhancing compression efficiency.
8) Advanced Internal Spray Curtain Cooling:This high-efficiency cooling method significantly reduces the temperature of compressed air, achieving near-isothermal compression. It minimizes pressure loss between stages, reduces the compression ratio, and boosts overall compression efficiency.
9) Minimized Internal Leakage:Dual-stage compression lowers the compression ratio for each stage, reducing internal leakage from high-pressure to low-pressure ends and enhancing volume efficiency.
10) Noise Reduction:The dual-stage design decreases the compression ratio, substantially reducing noise levels, particularly during unloading.
11) Simplified Maintenance and Service:Apart from the screw air end, the dual-stage compressor unit's other systems and structures are comparable to single-stage compressors, ensuring user-friendly maintenance and service.
1. Unbeatable Price Advantage
We offer factory-direct pricing to ensure our customers stay ahead of the competition with the most competitive rates.
2. Direct Deals, Seamless Transactions
Our products come straight from the factory, ensuring that you receive the most cost-effective solutions available.
3. Comprehensive OEM & ODM Services
Leverage our extensive production and management capabilities to meet your specific OEM/ODM needs.
4. Tailored Customisation Options
We accommodate non-standard, export, and custom orders for voltage, power, pressure, and more. Reach out to us for your bespoke requirements.
5. Small Order Friendly
Start with a small trial order to evaluate the superior quality of our products.
6. Rapid Delivery
Receive high-quality products with prompt and reliable delivery times.
7. Full Authorization Support
For distributors, we provide complete authorization certificates to legally market and sell our prestigious SANZHI brand products.
Sanzhi (Henan) Compressor Co., Ltd, with a rich legacy of over a decade, stands as a premier manufacturer specializing in the production of screw air compressors and screw vacuum pumps. Our extensive product portfolio includes normal pressure, low-pressure screw air compressors, permanent magnet frequency conversion screw air compressors, two-stage compression screw air compressors, screw air compressors for laser cutting, single-tank mobile screw air compressors, double-tank mobile screw air compressors, electric mobile screw air compressors, diesel mobile screw air compressors, and screw vacuum pumps. We cater to a diverse range of industrial needs with precision and expertise.
Our production facilities are equipped with state-of-the-art, lean multi-air compressor assembly lines designed for maximum efficiency. With the dedication of over 50 skilled employees, we continually enhance our management systems, such as ERP, to reduce lead times and ensure rapid delivery of top-quality products.
Our commitment to excellence is reflected in our management practices. Our factory is ISO9001 certified, adhering to the highest standards of quality management. We implement rigorous quality control processes, ensuring that each machine undergoes comprehensive material, production, and pre-delivery inspections before it leaves our facility.
Customer satisfaction is at the heart of our operations. In pre-sales, we provide expert guidance to help customers select the right air equipment for their diverse needs, offering high customization options in appearance and configuration. We also specialize in OEM products to meet the unique demands of our dealers. Our after-sales service team is always ready to provide prompt support and solutions, ensuring a seamless experience for our customers.
At Sanzhi (Henan) Compressor Co., Ltd, our mission is to deliver superior, stable, and reliable products. We strive to build long-term relationships with our customers through efficient delivery, top-quality machines, and competitive pricing. Trust us to provide you with the ideal compressed air solution.
Our factory is conveniently located in Xinzheng City, Henan Province, China. We offer a seamless pickup service from Xinzheng International Airport, which is just 30 kilometers away, ensuring a comfortable and welcoming visit to our facility. We warmly invite you to our company!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a professional manufacturer specializing in screw air compressors, boasting over a decade of experience.
Q2. How do you control quality?
A: 1. We meticulously inspect all raw materials.
2. We implement strict control over installation procedures.
3. Each machine undergoes a minimum of 5 hours of continuous testing 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 in your country (V/Hz)
4. Any additional accessories you might need, such as an air tank, filters, and/or air dryers.
Share this information with us, and we will craft 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's air compressors support voltages including 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, 440v/60hz/3p, and can be customized to your specific requirements.
Q6. How long is the delivery time?
A: For standard voltage units, we ensure prompt delivery within 15 working days after order confirmation. For non-standard units, please get in touch with our dedicated sales team for precise details.
Q7. What's the payment term?
A: Our payment terms are structured as follows: 30% T/T in advance, 40% T/T before shipment, and the remaining 30% T/T against the B/L copy. Payments are accepted in both USD and RMB.
Q8. How about your warranty?
A: We are proud to offer a comprehensive warranty: a one-year warranty for the entire machine and a two-year warranty specifically for the screw air compressor, not including consumable spare parts.
Q9. What about the maintenance?
A: The initial maintenance should be conducted after 500 hours of operation. Subsequent maintenance is recommended every 2000-3000 hours, depending on the specific operating conditions.
Q10. Can machines be run in high-temperature environments?
A: Absolutely. Our machines are engineered to perform efficiently in high-temperature environments, with an impressive operational range from -20° to 45° (-4ºF to 113ºF).
Q11. Do you offer OEM service?
A: Certainly. Our expert design team is enthusiastic about accommodating both OEM and ODM orders to meet your bespoke needs.
Q12. How long could your air compressor be used?
A: Our air compressors boast a durable lifespan, typically exceeding 10 years of reliable performance.
Q13. Will you provide some spare parts for the machines?
A: Yes, we are committed to providing the necessary spare parts for all our machines.
Q14. How about your after-sales service?
A: We offer robust after-sales support, including online guidance for installation and commissioning. Additionally, we can arrange for our experienced engineers to provide on-site training and installation assistance.
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