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Participating in the 138th Canton Fair in Autumn 2025: A Complete Guide The 138th Canton Fair in autumn 2025 is set to be a spectacular event for businesses worldwide. Here's everything you need to know about the exhibition time and how to apply for participation.（Our factory near to the Canton Fair, welcome to visit us!!!） Exhibition Schedule The fair will be held in three phases: - Phase 1: From October 15th to 19th, 2025. This phase mainly showcases industrial products, including electronic consumer goods and information products, vehicles, hardware, household appliances, bicycles, power and electrical equipment, auto parts, motorcycles, processing machinery and equipment, chemical products, etc. - Phase 2: From October 23rd to 27th, 2025. It focuses on consumer products such as gifts and premiums, bathroom equipment, kitchen utensils, festival products, glass handicrafts, daily - use ceramics, furniture, woven and rattan - iron handicrafts, etc. - Phase 3: From October 31st to November 4th, 2025. This phase features products like personal care appliances, children's clothing, rural revitalization special products, luggage, food, clothing accessories, home textiles, sports and travel leisure products, pet products, etc. How to Apply for Exhibition Qualifications 1. Determine Your Eligibility: First, ensure that your company meets the basic requirements. This usually includes having a valid business license, meeting certain export performance standards (if applicable), and complying with the Canton Fair's ethical and legal regulations. For example, the fair prohibits enterprises and exhibits under penalty for illegal and irregular activities from participating.   2. Online Application via "Exhibitor E - Service System": Log in to the official "Exhibitor E - Service System" of the Canton Fair (https://exhibitor.cantonfair.org.cn/). Here, you need to register your company information accurately, including company name, business scope, contact details, etc. Then, carefully fill in the exhibition application form, specifying the products you intend to display and the exhibition phase you prefer.   3. Submit Supplementary Materials: After filling in the online application, you may need to submit supplementary materials. For brand booth applications, brand - booth - holding enterprises in the 137th Canton Fair should confirm the number of brand booths for the 138th Canton Fair according to the corresponding exhibition areas. Non - brand enterprises can submit applications for brand booths' dynamic adjustment according to relevant regulations, together with necessary certificates and materials demonstrating their strength, such as manufacturing single - champion certificates, national high - tech enterprise certificates, etc.   4. Contact Your Local Trade Delegation: After completing the online application and material submission, get in touch with your local trade delegation. In China, different regions have their own trade delegations responsible for the preliminary review of local enterprises' applications. For example, enterprises in Shanghai need to submit relevant paper application materials to the Shanghai Trade Delegation according to its requirements, which usually include a printed and signed exhibition application form, business license, customs declaration record certificate, etc.   5. Await Approval: The application will go through a review process. The time for the review varies, but you can track the progress through the "Exhibitor E - Service System" or by contacting your local trade delegation. Once approved, you will receive a notice, and then you can start preparing for your exhibition at the Canton Fair. Participating in the Canton Fair can bring numerous business opportunities, from expanding international markets to building brand awareness. Make sure to follow the above steps carefully to secure your participation in this grand trade event.

Equipping a freeze dryer with a two-stage rotary BAOSI vacuum pump offers significant advantages over single-stage designs, particularly in achieving deeper vacuum levels, enhancing vapor handling efficiency, and improving operational reliability. Here’s a detailed analysis based on technical specifications and real-world applications:   1. Higher Ultimate Vacuum & Faster Pumping Speed Two-stage BAOSI pumps like the BSV series can reach ultimate vacuum levels as low as 0.5 Pa (5×10⁻³ mbar) , far exceeding the capabilities of single-stage pumps (typically 10–100 Pa). This is critical for freeze dryers, where pressures below 10 Pa are often required to facilitate efficient ice sublimation. The dual-stage compression design distributes the pressure ratio across two chambers, enabling faster evacuation of air and non-condensable gases—pumping speeds range from 10–300 m³/h , ideal for large-scale pharmaceutical or food processing applications. For example, in dairy freeze drying, two-stage pumps achieve the required 1 hPa vacuum within hours, ensuring product quality and consistency .   2. Superior Water Vapor Handling Freeze dryers generate substantial water vapor during the sublimation phase. BAOSI’s two-stage pumps incorporate gas ballast systems and anti-oil return mechanisms to manage this challenge:   Gas Ballast: By introducing controlled air into the second stage, the pump prevents oil contamination from condensed water vapor. Models like the Edwards RV series (similar in design) handle 220–290 g/h of water vapor edwardsvacuum.cn, a feature directly applicable to BAOSI’s industrial-grade pumps. Anti-Oil Return Design: Integrated check valves and baffles (e.g., in the DGJ-12C freeze dryer ) prevent oil backflow into the chamber, protecting sensitive products and maintaining system cleanliness.   This contrasts with single-stage pumps, which often struggle with vapor overload, leading to oil emulsification and reduced performance.   3. Energy Efficiency & Thermal Stability While single-stage pumps may seem simpler, two-stage designs optimize energy use through interstage cooling:   The first stage handles high-pressure compression, while the second stage focuses on achieving deep vacuum. This reduces heat buildup and minimizes energy losses compared to single-stage units, which operate at higher compression ratios and temperatures . BAOSI pumps also feature forced oil lubrication and precision-engineered materials , ensuring stable operation at low temperatures (e.g., -65°C in R404A systems edwardsvacuum.cn) without excessive power consumption.   For example, in pilot-scale freeze dryers, two-stage pumps achieve -86°C condenser temperatures efficiently, supporting rapid freezing and drying cycles .   4. Reliability & Reduced Maintenance The dual-stage architecture distributes mechanical stress, extending component lifespan:   Lower Wear: Each stage operates at a lower compression ratio, reducing bearing and vane fatigue. This aligns with Busch Zebra pumps’ reputation for robustness in continuous industrial use . Self-Protective Features: BAOSI pumps include automatic shutoff valves and Pirani vacuum sensors , which detect leaks or vapor overloads to prevent damage. In contrast, single-stage pumps often lack such safeguards, increasing downtime for repairs. Longer Oil Life: The gas ballast system and interstage cooling reduce oil degradation, minimizing replacement frequency. For instance, the DGJ-12C freeze dryer’s pump uses oil monitoring to alert users when maintenance is needed .   5. Adaptability to Harsh Environments BAOSI’s two-stage pumps are designed for corrosive or chemically active environments:   PTFE-Coated Components: Optional Teflon treatments on cold traps and pump interiors resist chemical vapors, making them suitable for drying solvents like ethanol or DMSO. Sealed Construction: Models like the Fossa scroll pump feature hermetic designs to prevent leaks, critical for applications requiring aseptic conditions (e.g., pharmaceutical lyophilization).   Single-stage pumps, with simpler seals and fewer vapor-handling mechanisms, are less suited for such demanding scenarios.   6. Case Study Validation In a dairy freeze-drying application, Pfeiffer’s two-stage pumps (similar to BAOSI’s) maintained stable 1 hPa vacuum for 24-hour cycles, ensuring milk particles retained nutritional integrity during transportation . Similarly, Labtron’s pilot-scale freeze dryers, equipped with two-stage pumps, achieve 5×10⁻³ mbar vacuum , validating their scalability for GMP-compliant production. Single-stage systems, by comparison, often fail to meet these stringent requirements without frequent adjustments.   Conclusion For freeze dryers, the two-stage BAOSI vacuum pump offers a comprehensive performance upgrade over single-stage alternatives:   Technical Superiority: Deeper vacuum, faster pumping, and advanced vapor management. Economic Benefits: Reduced energy costs, longer maintenance intervals, and fewer product losses due to system failures. Application Flexibility: Adaptability to diverse industries, from pharmaceuticals to food processing.   While two-stage pumps may have higher upfront costs, their efficiency and reliability make them the preferred choice for high-output, precision-driven freeze-drying operations.

  Compared with single-stage compressors, two-stage BITZER compressors offer advantages such as higher energy efficiency, lower discharge temperatures, better adaptation to low temperatures, and longer service life. Therefore, they are more suitable for freeze dryers. The specific analysis is as follows:   Higher energy efficiency: The two-stage compression process of two-stage BITZER compressors is closer to isothermal compression, which can reduce energy consumption. According to engineering thermodynamics theory, isothermal compression saves the most work. Two-stage compression distributes the pressure ratio in two stages, reducing the compression ratio of each stage, thus reducing internal leakage and improving volumetric efficiency. Compared with single-stage compression, two-stage compression can save 5%-8% more energy. Lower discharge temperature: In single-stage compressors, compressed air can become very hot, resulting in energy losses due to heat dissipation. In contrast, two-stage compression allows for more efficient inter-stage cooling, reducing the overall heat generation and the discharge temperature of compressed air. This is beneficial for the stable operation of freeze dryers and helps maintain the quality of freeze-dried products. Better adaptation to low temperatures: Two-stage BITZER compressors can reach lower evaporation temperatures. For example, when using R404A refrigerant, the low evaporation temperature can reach -65℃. Freeze dryers require low-temperature environments to ensure the sublimation of water in materials. The low-temperature performance of two-stage compressors can better meet this requirement. Longer service life: Since the compression process is shared by two stages, the load on each stage is reduced, and the reduction in the compression ratio also reduces the impact load on the bearings. This helps to prolong the service life of the compressor, reduce maintenance costs, and improve the overall reliability and stability of the freeze dryer.