Internal Structure Frontside
Internal Structure Backside
Working Principle
In an ideal scenario of air compression, the power necessity for single-stage pressure transmission matches the cumulative power needed for multi-stage compression. However, in practice, various factors such as coupling power loss, bearing friction, and the cooling effect of liquid viscosity increase the actual working power. By strategically minimizing the compression ratio across each stage, the total power demand for multi-stage compression can be aligned to be less than that of single-stage compression, thereby optimizing efficiency and reducing wastage.
At the core of the two-stage screw air compressor lies its sophisticated design, featuring a tandem of rotary screw compressors with distinct active and passive screws. The active screw, energized by an external power source, engages the passive screw in a seamless rotation. The initial stage leverages a low-pressure rate screw group, followed by a high-pressure rate screw group in the second phase. Each screw is encircled by a sealing air film, which ensures that as they rotate, the gas undergoes three critical stages: suction, pressurization, and exhaust, culminating in efficient compression.
First stage compression: The initial phase of the two-stage screw air compressor employs a low-pressure rate screw group, compressing the gas snugly within. Upon entering the screw compression chamber through the suction valve, the gas is deftly maneuvered by the high-speed rotation of the screw rotor, squeezing it out progressively and transitioning it to the subsequent compression stage.
Second stage compression: As the process advances to the second stage, the gas is channeled into a more confined screw space, facing an intensified squeeze under elevated temperature and pressure. The system's exhaust valve then gracefully opens, facilitating the release of high-pressure gases, marking the conclusion of the compression stage.
Natural air is ushered into the first stage of compression through an air filter, where it harmonizes with a trace of lubricating oil in the compression chamber. This synchronized action compresses the mixed gas to an interstage pressure. Following this, the gas journeys through a cooling channel, engaging with abundant oil mist, significantly mitigating its temperature. The cooled compressed gas then advances to the second-stage rotor, undergoing rigorous two-stage compression to meet the final exhaust pressure. The compression saga concludes as the compressor releases the compressed gas through the exhaust valve, completing the cycle with precision and efficiency.
Water-cooled compressors elegantly utilize water as a cooling medium. As cooling water seamlessly navigates through the air compressor, it performs a dual role of cleansing and lubrication, effectively extending the lifespan of friction-prone parts. During operation, the cooling water efficiently extracts heat from the cylinder and compressed gas, significantly lowering exhaust temperature and reducing power consumption. This results in lower operational costs for the air compressor. However, it is crucial to address the potential scaling issues within the water cooling system.
1) Exceptional PM Motor Efficiency: Featuring an expansive constant torque range alongside an even broader weak magnetic range, the efficiency of the permanent magnet motor surpasses that of standard motors by an impressive 20-30%. Remarkably, the motor maintains its efficiency when operating outside the rated frequency, ensuring consistent performance and superior motor efficiency.
2) Maintenance-Free Motor: Engineered without internal bearings, the permanent magnet motor eradicates the need for costly bearing maintenance and replacements, offering a maintenance-free experience.
3) State-of-the-Art Integrated Frequency Converter: Employing China's premier frequency system, this converter boasts a broad speed regulation range with high precision. Tailored to the user's gas demand, the frequency modulation operation delivers outstanding energy savings for the air compressor.
4) Zero Transmission Losses: The permanent magnet motor and compressor are seamlessly united through an embedded integrated shaft structure. This compact design eradicates couplings and other transmission components, achieving flawless 100% transmission efficiency.
5) Smooth Variable Frequency Start and Soft Start drastically mitigate impact on power grid equipment, ensuring the protection and longevity of electrical installations.
6) Optimized Energy Consumption: With a frequency conversion range spanning from 25% to 100% (in contrast to the typical 50% to 100%), this system achieves over 30% energy savings compared to fixed-speed air compressors. Compared to ordinary variable frequency compressors, energy savings reach approximately 5%. The more significant the fluctuations in system gas consumption, the more pronounced the energy-saving benefits.
7) Innovative Two-Stage Compression Air End: Our two-stage compression screw machine boasts a distinct air end design, seamlessly integrating the first and second-stage compression rotors in a single casing and driving them via gears to ensure optimal linear speed for each rotor, elevating compression efficiency.
8) Advanced Internal Spray Curtain Cooling Method: Harnessing an advanced internal spray curtain cooling technique, it ensures superior cooling effects, drastically lowering compressed air temperature and approaching isothermal compression. This method also reduces pressure loss between stages, diminishes compression ratios, and enhances compression efficiency.
9) Minimized Internal Leakage: By employing two-stage compression, the compression ratio of each stage is reduced, minimizing internal leakage from high to low-pressure ends, thereby boosting volumetric efficiency.
10) Enhanced Noise Reduction: Two-stage compression effectively lowers the compression ratio, significantly diminishing noise levels, particularly during unloading phases.
11) Simplified Maintenance and Service: With the two-stage compressor unit mirroring the single-stage compression systems and structures, except for the screw air end, maintenance is simplified, offering heightened convenience for users.
1. Competitive Pricing Advantage
By providing ex-factory pricing directly to our customers, we empower them to enjoy unmatched market competitiveness.
2. Direct Deal Benefits
With all products supplied directly from our factory, customers receive the most cost-effective solutions on the market.
3. Comprehensive OEM & ODM Services
Our factory's robust production and management capabilities enable us to offer a full spectrum of OEM/ODM services tailored to your needs.
4. Tailored Customization Services
We accept non-standard and export orders, customizing voltage, power, pressure, etc., to meet your specific requirements. Contact us with your demands.
5. Small Order Acceptance
Experience our product quality firsthand by placing a small trial order, allowing you to test before committing to larger quantities.
6. Expedited Delivery Services
Benefit from our high-quality products delivered with exceptional speed and timeliness.
7. Comprehensive Authorization for Distributors
We provide full authorization certificates empowering distributors to effectively sell our distinguished SANZHI brand products.
Sanzhi (Henan) Compressor Co., Ltd is a distinguished and seasoned manufacturer specializing in the creation of screw air compressors and screw vacuum pumps, boasting over a decade of unparalleled expertise. Our expansive product selection encompasses a variety of innovations, including normal pressure and low-pressure screw air compressors, state-of-the-art permanent magnet frequency conversion screw air compressors, robust two-stage compression screw air compressors, laser-cutting optimized screw air compressors, and versatile mobile screw air compressors available in single-tank, double-tank, electric, and diesel variations. Additionally, our portfolio features high-efficiency screw vacuum pumps.
In production, we excel by leveraging advanced multi-air compressor assembly lines that epitomize lean and modern manufacturing principles. Our team of over 50 dedicated professionals relentlessly strives to refine our management systems, such as ERP, ensuring shortened lead times and the rapid delivery of top-tier, qualified products.
In management, our commitment to quality is evidenced by our ISO9001 quality management system certification. We are steadfast in our adherence to rigorous quality management protocols and meticulously execute standard quality control procedures. Every machine that leaves our facility undergoes comprehensive inspections, including material, production, and pre-delivery evaluations, ensuring impeccable performance.
In customer service, our pre-sales initiatives provide expert guidance for selecting air equipment across diverse applications, allowing for extensive customization in appearance and configuration. We are adept at crafting bespoke products to satisfy dealer-specific demands through OEM services. Furthermore, our after-sales support is bolstered by a proficient sales and service team, ensuring swift and effective customer responses.
At Sanzhi (Henan) Compressor Co., Ltd, we are passionately committed to offering superior, reliable products, designed to foster enduring partnerships with our clients. Our promise of efficient delivery, exceptional product quality, and competitive pricing makes us your trusted provider for comprehensive compressed air solutions.
Our state-of-the-art factory is strategically located in Xinzheng City, Henan Province, China. For your convenience, we offer seamless transportation from Xinzheng International Airport to our facility, a scenic journey of just 30 kilometers, approximately an hour in duration. We warmly welcome you to visit our company and witness our excellence firsthand!
FAQ
Q1. Are you a trading company or manufacturer?
A: We are an esteemed manufacturer specializing in screw air compressors, boasting over a decade of industry expertise.
Q2. How do you control quality?
A: 1. Rigorous inspection of raw materials is undertaken to ensure top-notch quality.
2. Our installation procedures adhere strictly to quality protocols.
3. Every machine undergoes a minimum of 5 hours of continuous testing before it is cleared for dispatch.
Q3. What information must I provide to get the suitable machine?
1. Specify the air delivery capacity required (Unit: CFM or m³/Min).
2. Indicate the necessary working pressure (Unit: PSI, Bar or Mpa).
3. Provide the voltage and frequency specifications of your country (V/Hz).
4. Inform us of any additional accessories needed, such as an air tank, filters, and/or air dryers.
Share this information with us, and we'll tailor a solution specifically 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 a range of voltages including 380v/50hz/3p, 400v/50hz/3p, 415v/50hz/3p, 220v/60hz/3p, 440v/60hz/3p, with customization available to meet your specific needs.
Q6. How long is the delivery time?
A: For standard voltage machines, our delivery time is typically 15 working days post order confirmation. For non-standard requirements, please consult our sales team.
Q7. What's the payment term?
A: We accept 30% T/T in advance, 40% T/T before shipment, and 30% T/T upon receipt of the B/L copy. Payments can be made in USD or RMB.
Q8. How about your warranty?
A: We offer a comprehensive warranty of one year for the entire machine and two years for the screw air compressor, excluding consumable spare parts.
Q9. What about the maintenance?
A: Initial maintenance is required after 500 hours, followed by routine maintenance every 2000-3000 hours, adjusted according to the operating environment.
Q10. Can machines be run in high-temperature environment?
A: Absolutely, our machines are designed to perform seamlessly in high-temperature environments, with a working range from -20° to 45°(-4ºF-113ºF).
Q11. Do you offer OEM service?
A: Yes, with a skilled design team, we warmly welcome both OEM & ODM orders to cater to your unique requirements.
Q12. How long could your air compressor be used?
A: Generally, our air compressors are built to last for more than 10 years.
Q13. Will you provide some spare parts for the machines?
A: Certainly, we are committed to providing spare parts for your machines.
Q14. How about your after-sales service?
A: We offer comprehensive after-sales support, including online guidance for installation and commissioning, with our engineers available to assist with training and installation.
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