Internal Structure - Frontside
Internal Structure - Backside
Working Principle
In an optimal air compression process, the power needed for single-stage pressure transmission equals the combined effort for multi-stage compression. However, in practical scenarios, the actual working power is higher due to inefficiencies like coupling transmission power loss, bearing friction, and cooling effects of liquid viscosity. By reducing the compression ratio at each stage, the total power required for multi-stage compression can be minimized compared to single-stage compression, effectively reducing these losses.
The two-stage screw air compressor features a dual-stage rotary screw mechanism. Each stage includes an active and a passive screw, where the active screw drives the passive screw through an external power transmission 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 enveloped in a sealing air film, compressing the gas through three phases: suction, pressurization, and exhaust.
First Stage Compression: The initial phase employs a low-pressure rate screw group to compress the gas. Gas enters the screw compression chamber via a suction valve, where it is progressively squeezed and transferred to the second stage under the high-speed rotation of the screw rotor.
Second Stage Compression: In this phase, the gas enters a narrower screw space, undergoing compression at higher temperatures and pressures. The high-pressure gases are then expelled from the system as the exhaust valve opens.
Natural air is filtered before being drawn into the first compression stage, where it mixes with a small amount of lubricating oil in the compression chamber. This blend is compressed to interstage pressure and then passes through a cooling channel, contacting a large amount of oil mist to significantly lower its temperature. The cooled gas then enters the second-stage rotor for further compression and is ultimately expelled through the exhaust valve, completing the entire process.
Water-cooled compressors harness the exceptional cooling power of water, resulting in enhanced lubrication and extended life of friction-wearing components. As the cooling water circulates, it aids in cleaning internal parts and efficiently dissipates heat from both the cylinder and compressed gas. This remarkable process significantly reduces exhaust temperature and power consumption, leading to noteworthy operational cost savings. However, it's crucial to monitor and address potential scaling issues within the water cooling system to maintain optimal performance.
1) Superior Efficiency of PM Motor:Our state-of-the-art permanent magnet motor boasts a broad constant torque and weak magnetic range, elevating efficiency by an impressive 20-30% compared to traditional motors. Even when not operating at the rated frequency, it maintains consistent efficiency, guaranteeing unparalleled motor performance every time.
2) Maintenance-Free Motor:Ingeniously designed without internal bearings, our permanent magnet motor eliminates the need for costly and time-consuming maintenance and bearing replacements, ensuring a hassle-free experience.
3) Integrated Frequency Converter:Equipped with China's leading frequency system, this unit provides a vast speed regulation range and exceptional precision. It adapts seamlessly to the user's 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 design eliminates couplings and other transmission parts, achieving perfect transmission efficiency of 100%.
5) Variable Frequency and Soft Start:Our motor executes variable frequency start and soft start, dramatically reducing the impact on power grid equipment and preventing potential damage to electrical components.
6) Enhanced Energy Efficiency:With a frequency conversion range of 25% to 100%-compared to the standard range of 50% to 100%-our system offers over 30% energy savings relative to fixed speed compressors. Furthermore, it saves approximately 5% more energy than standard variable frequency compressors, with greater energy savings realized during significant fluctuations in system gas consumption.
7) Unique Two-Stage Compression Air End:Our two-stage compression screw machine features a uniquely engineered air end, integrating both first-stage and second-stage compression rotors within a single casing. These rotors rotate through gears to achieve optimal linear speed for each stage, thereby significantly boosting compression efficiency.
8) Innovative Internal Spray Curtain Cooling:Our cutting-edge internal spray curtain cooling method provides exceptional cooling performance. It notably lowers the temperature of compressed air, approximating isothermal compression, and reduces pressure loss between stages, thereby enhancing compression efficiency.
9) Minimized Internal Leakage:Adopting a two-stage compression method reduces the compression ratio of each stage, thereby minimizing internal leakage from high-pressure to low-pressure ends and enhancing volumetric efficiency.
10) Noise Reduction:The two-stage compression design significantly reduces the compression ratio, resulting in a marked reduction in operational noise, particularly during unloading.
11) Simplified Maintenance and Service:Aside from the screw air end, our two-stage compressor unit retains similar systems and structures to single-stage compressors, ensuring straightforward 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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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 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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