Internal Structure - Frontside
Internal Structure - Backside
Working Principle
In an ideal air compression process, the power needed for single-stage compression equals the combined power demand of multi-stage compression. However, actual operations witness increased power usage due to inefficiencies like coupling transmission power loss, bearing friction, and cooling effects from liquid viscosity. By lowering the compression ratio at each stage, multi-stage compression can significantly reduce total power requirements compared to single-stage compression, thus minimizing these inherent losses.
The two-stage screw air compressor is ingeniously designed with a two-stage rotary screw mechanism. Each stage comprises an active and a passive screw, where the active screw propels the passive one through an external power transmission device. The first stage features a low-pressure screw group, while the second stage operates with a high-pressure screw group. These screws are enveloped in a sealing air film. As they rotate, the gas undergoes a three-phase transformation: suction, pressurization, and exhaust.
First Stage Compression: The initial compression stage employs a low-pressure screw group to compress the gas. This gas enters the screw compression chamber through the suction valve. With the high-speed rotation of the screw rotor, the gas is progressively squeezed and then transferred to the second stage.
Second Stage Compression: In this stage, the gas moves into a more confined screw space, where it is subjected to higher temperatures and pressures. The exhaust valve then opens to release the high-pressure gases from the system.
Natural air is filtered before entering the first compression stage, where it combines with lubricating oil in the compression chamber. This mixture is compressed to interstage pressure and then cooled via a cooling channel, which exposes it to abundant oil mist, significantly reducing its temperature. The cooled gas then enters the second-stage rotor for further compression, ultimately being expelled through the exhaust valve, completing the entire compression cycle.
Water-cooled compressors harness the cooling prowess of water, circulating it through the air compressor to not only enhance lubrication by cleansing internal components but also extend the lifespan of friction-prone parts. During operation, this cooling water masterfully dissipates heat from the cylinder and compressed gas, dramatically lowering exhaust temperature and reducing power consumption, leading to significant operational cost savings. It's crucial, however, to be mindful of potential scaling within the water cooling system.
1) Superior Efficiency of PM Motor:Our permanent magnet motor boasts an expansive range of constant torque and weak magnetic performance. Its efficiency surpasses traditional motors by 20-30%. Notably, even when not operating at the rated frequency, its efficiency remains high, ensuring exceptional motor performance at all times.
2) Maintenance-Free Motor:With a design free of internal bearings, the permanent magnet motor eradicates the need for expensive maintenance and frequent bearing replacements.
3) Integrated Frequency Converter:Featuring China's leading frequency system, this unit provides a wide speed regulation range with high precision. It adjusts seamlessly to the user's actual gas requirements, delivering outstanding energy-saving benefits for the air compressor.
4) Zero Transmission Loss:The permanent magnet motor and compressor are constructed with an integrated shaft structure, directly connected and more compact. By eliminating couplings and other transmission parts, the system achieves perfect 100% transmission efficiency.
5) Variable Frequency and Soft Start:This motor features variable frequency start and soft start capabilities, significantly reducing the impact on power grid equipment and preventing damage to electrical components.
6) Enhanced Energy Efficiency:Offering a frequency conversion range of 25% to 100% (compared to the standard 50% to 100%), this system achieves over 30% energy savings compared to fixed-speed compressors. It also provides approximately 5% more energy savings than standard variable frequency compressors. Increased fluctuations in system gas consumption further amplify these energy-saving effects.
7) Unique Two-Stage Compression Air End:Our two-stage compression screw machine features a uniquely designed air end that integrates both first-stage and second-stage compression rotors within a single casing. These rotors are driven by gears to achieve optimal linear speed for each stage, significantly enhancing compression efficiency.
8) Innovative Internal Spray Curtain Cooling:Our advanced internal spray curtain cooling method provides superior cooling performance, significantly lowering the temperature of compressed air to approximate isothermal compression. This method also reduces pressure loss between stages, optimizing compression efficiency.
9) Minimized Internal Leakage:Two-stage compression reduces the compression ratio for each stage, minimizing internal leakage from high-pressure to low-pressure ends, thus boosting volumetric efficiency.
10) Noise Reduction:The two-stage compression mechanism lowers the compression ratio, dramatically reducing operational noise, especially during unloading phases.
11) Simplified Maintenance and Service:Aside from the screw air end, the two-stage compressor unit retains similar systems and structures to single-stage compressors, ensuring ease of maintenance and user convenience.
Packaging & Shipping
Our Advantages
1. Unmatched Price Advantage
We offer direct ex-factory pricing, empowering our customers with a competitive edge.
2. Direct Deal Benefits
Our products are supplied directly from the factory, ensuring you receive the most cost-effective solutions.
3. Comprehensive OEM & ODM Services
Our robust production and management capabilities enable us to provide exceptional OEM/ODM services tailored to your needs.
4. Bespoke Customisation Services
We accept non-standard and export orders, and can customize voltage, power, pressure, etc. Reach out to us with your specific requirements.
5. Small Order Acceptance
Test the excellence of our products by placing a small trial order first.
6. Expedited Delivery
Experience the combination of high-quality products and prompt delivery.
7. Comprehensive Authorization
For our distributors, we provide full authorization certificates, empowering you to sell our SANZHI brand products with confidence.
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Certifications
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 standard voltage, your order will be processed within a swift 15 working days after confirmation. For non-standard specifications, kindly reach out to our sales team for detailed timelines.
Q7. What's the payment term?
A: We require 30% T/T upfront, another 40% T/T before shipment, and the final 30% T/T upon receipt of the B/L copy. Payments can be made in both USD and RMB.
Q8. How about your warranty?
A: We offer a comprehensive one-year warranty for the entire machine and an extended two-year warranty specifically for the screw air compressor, excluding consumable spare parts.
Q9. What about the maintenance?
A: The initial maintenance should be conducted after 500 hours of operation. Subsequent maintenance is required every 2000-3000 hours, adjusted according to the actual working environment.
Q10. Can machines be run in high-temperature environment?
A: Absolutely, our machines are designed to operate efficiently in high-temperature environments, with a working temperature range from -20°C to 45°C (-4°F to 113°F).
Q11. Do you offer OEM service?
A: Yes, we proudly offer OEM and ODM services, facilitated by our professional design team. Your custom orders are highly welcome.
Q12. How long could your air compressor be used?
A: Typically, our air compressors have a lifespan exceeding 10 years.
Q13. Will you provide some spare parts for the machines?
A: Certainly, we will provide spare parts for your machines.
Q14. How about your after-sales service?
A: We offer comprehensive after-sales support, including online instructions for installation and commissioning. Additionally, our engineers are available for training and installation assistance.
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