Internal Structure - Frontside
Internal Structure - Backside
Working Principle
During the air compression process, achieving optimal efficiency in single-stage compression requires a power effort equivalent to multi-stage compression. However, real-world inefficiencies such as coupling power loss, bearing friction, and cooling liquid viscosity lead to higher power consumption. By reducing the compression ratio at each stage, multi-stage compression can minimize these inefficiencies, resulting in lower total power requirements compared to single-stage compression.
Our innovative two-stage screw air compressor features a dual-stage rotary screw mechanism, with each stage possessing an active and a passive screw. The active screw drives the passive screw via an external power device. The first stage utilizes a low-pressure rate screw group, while the second stage employs a high-pressure rate screw group. Each screw is surrounded by a sealing air film, compressing the gas through three distinct phases: suction, pressurization, and exhaust.
First Stage Compression: The process begins with a low-pressure rate screw group compressing the gas. Gas enters the compression chamber through a suction valve, where it is gradually compressed and transferred to the second stage under the high-speed rotation of the screw rotor.
Second Stage Compression: In this phase, the gas moves into a narrower screw space, experiencing compression at elevated temperatures and pressures. The high-pressure gases are then expelled from the system as the exhaust valve opens, completing the compression cycle.
The process starts with natural air being filtered before entering the first compression stage, where it mixes with a small quantity of lubricating oil. This mixture is compressed to interstage pressure and passes through a cooling channel, where it meets a large amount of oil mist, significantly reducing its temperature. The cooled gas then proceeds to the second stage for further compression and is ultimately expelled through the exhaust valve, thus completing the entire compression process.
Water-cooled compressors leverage the incredible cooling power of water, resulting in unmatched lubrication and an extended lifespan for components susceptible to friction. As cooling water circulates, it thoroughly cleans internal parts and effectively dissipates heat from both the cylinder and compressed gas. This highly efficient process drastically reduces exhaust temperature and power consumption, leading to significant operational cost savings. Consistent monitoring and addressing potential scaling issues within the water cooling system are crucial for maintaining peak performance.
1) Superior Efficiency of PM Motor:Our state-of-the-art permanent magnet motor features a vast constant torque and weak magnetic range, enhancing efficiency by an impressive 20-30% compared to traditional motors. Even at non-rated frequencies, it sustains consistent efficiency, ensuring top-tier motor performance at all times.
2) Maintenance-Free Motor:Designed without internal bearings, our permanent magnet motor eliminates the need for costly and time-intensive maintenance and bearing replacements, offering a seamless, hassle-free experience.
3) Integrated Frequency Converter:Equipped with China's leading frequency system, this unit boasts an extensive speed regulation range and unmatched precision. It adapts effortlessly to actual gas demand, delivering substantial energy-saving benefits for the air compressor.
4) Zero Transmission Loss:Featuring an integrated shaft structure that directly connects the permanent magnet motor and compressor, this innovative design eliminates couplings and other transmission components, achieving flawless transmission efficiency of 100%.
5) Variable Frequency and Soft Start:Our motor employs variable frequency start and soft start, significantly reducing impact on power grid equipment and protecting against potential electrical component damage.
6) Enhanced Energy Efficiency:With a frequency conversion range from 25% to 100%-compared to the standard range of 50% to 100%-our system delivers over 30% energy savings versus fixed speed compressors. It also saves approximately 5% more energy than standard variable frequency compressors, with even higher savings during substantial fluctuations in system gas consumption.
7) Unique Two-Stage Compression Air End:Our two-stage compression screw machine boasts a specialized air end, integrating first-stage and second-stage compression rotors within a single casing. These rotors operate via gears to achieve optimal linear speed for each stage, significantly increasing compression efficiency.
8) Innovative Internal Spray Curtain Cooling:Our groundbreaking internal spray curtain cooling technique delivers exceptional cooling performance. It dramatically lowers compressed air temperature, closely approximating isothermal compression, and reduces pressure loss between stages, thereby enhancing compression efficiency.
9) Minimized Internal Leakage:Utilizing a two-stage compression method reduces the compression ratio for each stage, thereby minimizing internal leakage from high-pressure to low-pressure sections and boosting volumetric efficiency.
10) Noise Reduction:The two-stage compression design significantly reduces the compression ratio, leading to a substantial reduction in operational noise, especially during unloading.
11) Simplified Maintenance and Service:Apart from the screw air end, our two-stage compressor unit retains similar systems and structures to single-stage compressors, ensuring easy maintenance and user convenience.
1. Unrivaled Price Competitiveness
We offer direct ex-factory pricing, empowering our customers with a formidable edge over competitors. Experience significant cost savings that translate into superior market positioning.
2. Direct Purchase Benefits
Receive unparalleled cost-effective solutions as all our products are supplied directly from our factory, ensuring you get the best value for your investment.
3. Extensive OEM & ODM Expertise
Our advanced production and management capabilities enable us to deliver top-notch OEM/ODM services, precisely tailored to your specific needs and requirements.
4. Tailored Customization Solutions
We cater to non-standard and export orders with the ability to customize voltage, power, and pressure. Contact us for bespoke solutions that match your exact specifications.
5. Acceptance of Small Orders
Experience our exceptional product quality by starting with a small trial order to assess our superior standards firsthand.
6. Swift and Efficient Delivery
Leverage our reliable and high-quality products coupled with speedy and efficient delivery services, ensuring your operations run seamlessly.
7. Full Authorization Support
Our distributors receive comprehensive authorization certificates, empowering you to sell our SANZHI brand products with the utmost confidence and credibility.
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 orders with standard voltage, we promise an impressively swift processing time of just 15 working days upon confirmation. For non-standard specifications, our dedicated sales team is available to provide detailed timelines and personalized assistance to meet your unique needs.
Q7. What's the payment term?
A: Our payment terms are designed for your convenience: an initial 30% T/T deposit upfront, an additional 40% T/T prior to shipment, and the remaining 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 offer a comprehensive one-year warranty covering the entire machine, along with an extended two-year warranty specifically for the screw air compressor. Please note, consumable spare parts are excluded from this warranty.
Q9. What about the maintenance?
A: The initial maintenance should be carried out after 500 hours of operation. Subsequently, maintenance is required every 2000-3000 hours, adjusted based on the actual working environment.
Q10. Can machines be run in high-temperature environment?
A: Absolutely! Our machines are meticulously engineered for high efficiency even in high-temperature environments, with an optimal working temperature range from -20°C to 45°C (-4°F to 113°F).
Q11. Do you offer OEM service?
A: Yes, indeed! We proudly offer both OEM and ODM services, backed by our professional and creative design team. Custom orders are highly welcome and encouraged.
Q12. How long could your air compressor be used?
A: Our air compressors typically boast a robust lifespan exceeding 10 years, ensuring long-term reliability and performance.
Q13. Will you provide some spare parts for the machines?
A: Certainly! We provide the necessary spare parts to ensure your machines maintain their functionality and efficiency.
Q14. How about your after-sales service?
A: We offer unparalleled after-sales support, including online instructions for installation and commissioning. Additionally, our skilled engineers are available for training sessions and on-site installation assistance, ensuring your complete satisfaction.
Audited Supplier 
){kind=link}
){kind=link}