Internal Structure Frontside
Internal Structure Backside
Working Principle
In an optimized air compression process, the power needed for single-stage pressure transmission matches the sum required for multi-stage compression. However, in real-world applications, actual working power increases due to coupling transmission power loss, bearing friction, and liquid viscosity's cooling effect. By reducing each stage's compression ratio, total power for multi-stage compression becomes less than single-stage requirements. This minimizes power wastage effectively.
The two-stage screw air compressor consists of a two-stage rotary screw design. Each stage includes an active and a passive screw; the active screw drives the passive screw via an external power transmission. The first stage uses a low-pressure rate screw group, while the second stage applies a high-pressure rate screw group. Each screw is encased in a sealing air film. During rotation, gas undergoes suction, pressurization, and exhaust processes for efficient compression.
First stage compression: The initial stage employs a low-pressure rate screw group to compress gas. Gas enters the screw compression chamber through the suction valve and, under the high-speed rotation of the screw rotor, is squeezed and transferred onward to the second stage.
Second stage compression: In this stage, gas enters a tighter screw chamber, experiencing compression at higher temperatures and pressures. The exhaust valve opens to discharge the high-pressure gases from the system, completing the compression cycle.
Natural air is drawn into the first stage through the air filter, where it mixes with a small amount of lubricating oil. This mixed gas is compressed to interstage pressure. It then passes through a cooling channel, interacting with oil mist to significantly reduce temperature. The cooled, compressed gas enters the second-stage rotor for final compression, reaching the desired exhaust pressure before being expelled through the exhaust valve, thus completing the entire compression process.
Water-cooled compressors utilize water as a coolant, enhancing both lubrication and the lifespan of friction-prone parts. This method effectively dissipates heat from the cylinder and compressed gas, lowering exhaust temperature and power consumption while reducing operational costs. However, it's crucial to monitor and address potential scaling issues within the water cooling system.
1) Superior PM Motor Efficiency:The constant torque and weak magnetic ranges are notably wider, with the efficiency of our permanent magnet motor surpassing regular motors by 20-30%. Even when operating outside the rated frequency, the motor maintains high efficiency, ensuring optimal performance at all times.
2) Maintenance-Free Motor:Our permanent magnet motor is designed without internal bearings, eliminating the need for costly bearing maintenance and replacement. This ensures a hassle-free experience for users.
3) Integrated Frequency Converter:Utilizing China's premier frequency system, this converter offers extensive speed regulation and high precision. It adjusts operation based on real-time gas demand, delivering exceptional energy-saving results.
4) Zero Transmission Loss:The integrated shaft design directly connects the permanent magnet motor with the compressor, creating a compact structure free of couplings and other transmission parts, achieving 100% transmission efficiency.
5) Variable Frequency and Soft Start:Our motor achieves variable frequency and soft starts, significantly reducing the impact on power grid equipment and preventing damage to electrical components.
6) Reduced Energy Consumption:With a frequency conversion range of 25% to 100% (compared to the regular 50% to 100%), our system saves over 30% more energy than fixed-speed air compressors, and 5% more than standard variable frequency compressors. The greater the fluctuation in system gas consumption, the more substantial the savings.
7) Unique Two-Stage Compression Air End:Our distinctive two-stage compression design integrates both the first and second-stage rotors within a single casing, optimizing linear speed and significantly enhancing compression efficiency.
8) Internal Spray Curtain Cooling Method:Featuring an advanced internal spray curtain cooling system, this method greatly reduces the temperature of compressed air, achieving near-isothermal compression, reducing pressure loss between stages, and enhancing overall compression efficiency.
9) Minimized Internal Leakage:The two-stage compression minimizes the compression ratio per stage, reducing internal leakage from high to low-pressure ends, thereby improving volumetric efficiency.
10) Noise Reduction:The two-stage compression system reduces the compression ratio, significantly lowering noise levels, especially unloading noise, creating a quieter working environment.
11) Easy Maintenance and Service:With a two-stage compressor unit, apart from the screw air end, other systems and structures remain similar to those in single-stage compressors, ensuring straightforward and convenient maintenance and user servicing.
1. Price Advantage
We offer customers direct ex-factory prices, significantly enhancing their market competitiveness.
2. Direct Deal
All our products come directly from the factory, ensuring more cost-effective offerings for you.
3. OEM & ODM Services
With our robust production and management capabilities, we offer comprehensive OEM/ODM services tailored to your needs.
4. Customised Service
We cater to non-standard orders, export orders, and specific requirements for voltage, power, pressure, etc. Contact us for bespoke solutions.
5. Accept Small Orders
Place a small trial order to evaluate the superior quality of our products.
6. Fast Delivery
We ensure high-quality products are delivered promptly and reliably.
7. Complete Authorisation
For distributors, we provide full authorization certificates, empowering you to sell our renowned 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!
Successful Cases
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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