Ingeniously Designed Internal Structure - Frontside
Masterfully Crafted Internal Structure - Backside
Ingenious Working Principle
In an ideal air compression process, the power required for single-stage pressure transmission equals the sum needed for multi-stage compression. However, during actual compression, the working power increases due to various factors such as coupling transmission power loss, bearing friction, and the cooling effect of liquid viscosity. To mitigate this, reducing the compression ratio of each stage can lower useless power, thus making the total power required for multi-stage compression less than that for single-stage compression.
The advanced two-stage screw air compressor features a two-stage rotary screw mechanism with active and passive screws in each stage. The active screw drives the passive one through an external power transmission device. The first stage employs a low-pressure screw group, while the second stage uses a high-pressure screw group. Each screw is enveloped by a sealing air film. During rotation, gas undergoes three processes: suction, pressurization, and exhaust, ensuring optimal compression.
First Stage Compression: The initial stage of the two-stage screw air compressor utilizes a low-pressure screw group to squeeze the gas. Gas enters the screw compression chamber through the suction valve, where the high-speed rotation of the screw rotor gradually compresses and transfers it to the second stage.
Second Stage Compression: In the second screw group, gas enters a tighter screw space, where it is compressed at higher temperature and pressure. The exhaust valve opens to release the high-pressure gases from the system.
Natural air is drawn into the first compression stage through an air filter, mixing with a small amount of lubricating oil in the compression chamber. This mixed gas is compressed to interstage pressure and then enters the cooling channel, encountering a significant amount of oil mist that greatly reduces its temperature. The cooled gas moves to the second-stage rotor for final compression to exhaust pressure. Finally, the compressor discharges the gas through the exhaust valve, completing the compression process.
Water-cooled compressors utilize water as the cooling medium. As cooling water circulates within the air compressor, it performs a cleaning function that aids lubrication, extending the life of friction-wearing components. During operation, cooling water removes heat from the cylinder and compressed gas, effectively lowering exhaust temperature and power consumption, thereby reducing operational costs. However, attention should be given to potential scaling issues within the water cooling system.
1) High efficiency of PM motor: The permanent magnet motor boasts a wider constant torque range and weak magnetic range, achieving 20-30% higher efficiency compared to regular motors. Even when operating away from the rated frequency, the PM motor maintains exceptional efficiency.
2) Motor maintenance-free:With no internal bearings, the permanent magnet motor eliminates the costs associated with bearing maintenance and replacement.
3) Integrated frequency converter: Employing China's premier frequency system, this setup offers extensive speed regulation and high precision. It adjusts operations based on actual gas demand, delivering remarkable energy-saving performance.
4) No transmission loss: The integrated shaft design directly connects the permanent magnet motor to the compressor, resulting in a more compact structure. This design eliminates couplings and other transmission parts, achieving 100% transmission efficiency.
5) Variable frequency start and soft startof the motor significantly reduce the impact on power grid equipment, preventing damage to electrical components.
6) Reduce energy consumption: Frequency conversion ranges from 25% to 100% (compared to 50% to 100% in ordinary frequency conversion), saving over 30% in energy compared to fixed-speed air compressors. Compared to standard variable frequency air compressors, energy savings reach about 5%. The greater the system gas consumption fluctuation, the more pronounced the energy-saving effect.
7) Two-stage compression unique air end:The two-stage compression screw machine features a uniquely designed air end. It integrates the first and second-stage compression rotors within a single case, rotating them directly through gears, ensuring each rotor achieves optimal linear speed for higher compression efficiency.
8) Internal spray curtain cooling method: Utilizing a highly energy-efficient internal spray curtain cooling method, it significantly reduces the temperature of compressed air, achieving near-isothermal compression. This method also reduces pressure loss between stages, enhancing compression efficiency.
9) Reduce internal leakage:Two-stage compression lowers the compression ratio for each stage, minimizing internal leakage from high-pressure to low-pressure end, thereby improving volume efficiency.
10) Noise reduction:The two-stage compression process decreases the compression ratio, substantially reducing noise, particularly during unloading.
11) Easy maintenance and service:Apart from the screw air end, the two-stage compressor unit's systems and structures are similar to single-stage units, facilitating user maintenance and service.
1. Unbeatable Price Advantage
We offer our customers direct-from-factory pricing, enhancing your competitiveness in the market.
2. Direct Transactions
Every product is supplied straight from our factory, guaranteeing you the most cost-effective solutions.
3. Comprehensive OEM & ODM Services
Our factory's robust production and management capabilities enable us to provide bespoke OEM and ODM services tailored to your needs.
4. Personalized Customization
We cater to non-standard and export orders, with customizable options for voltage, power, and pressure. Contact us for your specific requirements.
5. Flexible Small Order Acceptance
Initiate with a small trial order to experience the superior quality of our products firsthand.
6. Swift Delivery
We ensure timely delivery of high-quality products to meet your needs.
7. Full Authorization Support
Distributors can benefit from comprehensive authorization certificates, empowering them to market our esteemed SANZHI brand products.
Sanzhi (Henan) Compressor Co., Ltd, an established powerhouse in the manufacturing realm, excels in crafting superior screw air compressors and vacuum pumps, with over ten years of unwavering dedication. Our extensive range includes standard and low-pressure screw air compressors, advanced permanent magnet frequency conversion models, two-stage compression units, specialized compressors for laser cutting, and versatile mobile screw compressors. We offer single and double-tank configurations in both electric and diesel options, as well as innovative screw vacuum pumps.
Our production processes are a testament to efficiency and modernity, featuring state-of-the-art multi-air compressor assembly lines. With a team of over 50 proficient employees, we continually refine our ERP-based management systems, significantly reducing lead times and guaranteeing the prompt delivery of superior quality products.
Adhering to rigorous standards, our factory proudly holds ISO9001 certification, underscoring our commitment to quality management. We meticulously enforce stringent quality control measures, ensuring each machine undergoes comprehensive material inspections, production evaluations, and thorough pre-delivery checks before it leaves our facility.
Our customer service ethos is unparalleled. Our pre-sales team offers expert advice to help you choose the perfect air equipment, backed by extensive customization options for appearance and configuration. We also excel in creating bespoke OEM products tailored to specific dealer requirements. Our after-sales team, comprised of seasoned professionals, guarantees rapid and effective responses to all customer inquiries and needs.
At Sanzhi (Henan) Compressor Co., Ltd, we are committed to delivering high-performance, reliable products that foster lasting customer relationships. Our efficient delivery schedules, top-notch machines, and competitive pricing ensure you receive outstanding compressed air solutions every time.
Conveniently located in Xinzheng City, Henan Province, China, our factory is easily accessible. We offer complimentary transportation from Xinzheng International Airport to our premises, a brief 30-kilometer journey that takes approximately one hour. We warmly welcome your visit!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are a dedicated manufacturer specializing in screw air compressors, boasting over a decade of professional experience.
Q2. How do you control quality?
A: 1. Strict inspection of raw materials.
2. Rigorous control of installation procedures.
3. Each machine undergoes a minimum of 5 hours of continuous testing before dispatch.
Q3. What information must I provide to get the suitable machine?
1. The required air delivery capacity (Unit: CFM or m³/Min).
2. The necessary working pressure (Unit: PSI, Bar, or Mpa).
3. The voltage and frequency of your location (V/Hz).
4. Any additional accessories needed, such as an air tank, filters, or air dryers.
Provide us with these details, and we will tailor a 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 offers compressors in voltages of 380V/50Hz/3P, 400V/50Hz/3P, 415V/50Hz/3P, 220V/60Hz/3P, 440V/60Hz/3P, and can customize according to your requirements.
Q6. How long is the delivery time?
A: For our standard voltage specifications, you can expect a prompt lead time of typically 15 working days after confirming your order. If you require custom non-standard voltage specifications, please reach out to our dedicated sales team for tailored delivery timelines.
Q7. What's the payment term?
A: Our payment terms are designed to be straightforward and secure: an initial 30% T/T deposit in advance, followed by 40% T/T before shipment, with the remaining 30% T/T due upon receipt of the B/L copy. We accept payments in both USD and RMB for your convenience.
Q8. How about your warranty?
A: We provide an industry-leading warranty, offering one year of coverage for the entire machine and an extended two-year warranty for the screw air compressor, excluding consumable spare parts.
Q9. What about the maintenance?
A: Initial maintenance should be carried out after 500 hours of operation. After that, routine maintenance intervals are set between 2000-3000 hours, depending on specific working conditions to ensure optimal performance.
Q10. Can machines be run in high-temperature environment?
A: Absolutely, our machines are meticulously engineered to perform efficiently even in high-temperature environments, with an operational temperature range from -20° to 45° (-4ºF to 113ºF).
Q11. Do you offer OEM service?
A: Yes, we offer both OEM and ODM services. Our professional design team is committed to providing flexible solutions to meet your specific requirements.
Q12. How long could your air compressor be used?
A: Our air compressors are engineered for exceptional durability, typically offering a lifespan that exceeds 10 years.
Q13. Will you provide some spare parts for the machines?
A: Yes, we guarantee the availability of spare parts for all our machines to ensure seamless operation.
Q14. How about your after-sales service?
A: We provide comprehensive after-sales support, including online guidance for installation and commissioning. Additionally, we can dispatch experienced engineers for on-site training and installation assistance to ensure your satisfaction.
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