In fields such as photovoltaic EVA encapsulation, high-end shoe material foaming, and medical packaging molding, the stability of the vacuum system directly determines product qualification rates and production efficiency. Issues like excessive bubble rates, prolonged defoaming time, and equipment corrosion by media often stem from improper selection. Today, combined with the industry-leading water circulation vacuum system technology, we will break down the precise selection plan for EVA foaming vacuum systems from selection logic, core advantages, practical cases to future trends, helping you avoid selection pitfalls and achieve cost reduction and efficiency improvement.

I. First Understand Your Needs: 3 Core Scenarios Define the Direction

The key to selection is "prescribing the right medicine"—different vacuum requirements and working conditions correspond to completely different solutions:

• High vacuum scenarios (ultimate vacuum 0.1-1 mbar): Suitable for photovoltaic EVA film encapsulation, precision sports shoe midsole foaming and other scenarios with strict vacuum requirements. A combination of "oil-lubricated rotary vane pump/dry screw pump as the main pump + water ring pump as the backing pump" is required to ensure vacuum stability and eliminate bubble residue.
• Medium vacuum scenarios (3-30 kPa): Preferred for shoe material rapid defoaming, ordinary packaging material molding and other scenarios. Directly adopt the four-way valve block integrated water ring vacuum system, which reduces pipe joints by more than 50%, significantly lowers leakage risks, and maximizes pumping efficiency.
• Complex multi-medium scenarios: When the working condition contains mold release agent moisture, dust or VA decomposition products, the German Rockwell LMT series water ring pump is the optimal solution. Through integrating filters and vacuum pressure gauges, it realizes real-time monitoring of gas-liquid separation and easily handles corrosive and impurity-containing mixed gases.

II. Water Circulation Vacuum System: 3 Core Advantages Outperform Traditional Solutions

As the "efficiency engine" of EVA foaming, the technical advantages of the water circulation vacuum system are reflected in the entire production process:

• More reliable structure: Patented four-way valve block integrated design with straight pipe arrangement not only facilitates installation but also significantly reduces subsequent maintenance difficulty, allowing novices to get started quickly.
• Strong adaptability: Equipped with corrosion-resistant materials such as fluororubber seals, it can withstand high-temperature (180℃) foaming processes and easily handle gases containing vinyl acetate (VA) decomposition products, without fear of corrosion from complex media.
• Cost-saving energy consumption: Intelligent adjustment of water supply valve opening + cooling tower circulating water linkage reduces energy consumption by 30%-40% compared with traditional water ring pumps, resulting in considerable electricity cost savings during long-term operation.

III. Avoid Parameter Pitfalls: Precisely Match Working Conditions in 5 Dimensions

IV. 3 Configuration Packages: From Cost Optimization to Intelligent Upgrade

According to production scale and demand levels, different configuration packages can be selected to balance practicality and cost-effectiveness:

• Basic package: Four-way valve block + 90° ball valve + vacuum pressure gauge + metal mesh filter, suitable for small shoe material production lines. It solves defoaming problems at the lowest cost and reduces sanitation and cleaning time by 40%.
• Advanced package: IoT sensors + servo energy-saving system + TAIC crosslinker-specific anti-corrosion coating, designed specifically for continuous production scenarios such as photovoltaic encapsulation. It can realize linkage between vacuum degree and process parameters, and extend the service life of mechanical seals by 2-3 times.
• Custom package: Two-stage water ring pump set + intelligent temperature control module, customized for high-humidity regions such as Southeast Asia. It completely solves the problem of vacuum fluctuation in high-humidity environments and ensures production stability.

V. Speak with Results: 3 Industry Cases Verify Effectiveness

• Shoe material manufacturing (a leading sports shoe manufacturer in Jinjiang): Configured with four-way valve block system + German Rockwell LMT-5161 water ring pump. Defoaming efficiency increased by 25%, energy consumption reduced by 18%, and the original 2-hour cleaning process was shortened to 48 minutes, directly improving production capacity.
• Photovoltaic encapsulation (a new energy enterprise in Jiangsu): Adopted "water ring pump as backing pump + dry screw pump as main pump + TAIC high-temperature resistant coating" scheme. Vacuum degree stabilized at 0.5 mbar, EVA film bubble rate <0.03%, and product qualification rate increased from 95% to 99.9%.
• Medical packaging (a medical device manufacturer in Guangdong): Selected oil-free water ring pump + activated carbon waste gas treatment module. It not only passed ISO 13485 medical industry certification but also achieved 100% compliance rate in odor residue testing, fully meeting medical-grade production requirements.

VI. Selection Decision Tree: Quickly Lock in the Plan in 3 Minutes

1. Is the vacuum requirement > 10 kPa? Yes → Choose basic water ring system (cost priority); No → Next step
2. Does the medium contain corrosive gases? Yes → Configure TAIC coating + 316L stainless steel pump body; No → Next step
3. Is 24/7 continuous operation required? Yes → Add industrial cooling tower + dual-pump redundancy design; No → Standard single-pump configuration
4. Are there FDA/ISO and other environmental certification requirements? Yes → Activated carbon module + oil-free pump; No → Basic waste gas emission design

VII. Future Trends: Intelligence + Greenization, Layout in Advance to Stay Ahead

• Intelligent upgrade: Starting from 2025, all systems come standard with IoT interfaces (supporting Modbus protocol), which can be directly connected to MES systems to realize real-time linkage between vacuum degree and process parameters, and full traceability of production data.
• Green manufacturing: The new water circulation regeneration module is launched with a wastewater reuse rate ≥85%, which not only reduces water resource consumption but also meets EU REACH regulations, helping enterprises achieve green production certification.

VIII. Service Guarantee: Ensure Worry-Free Production

We deeply understand that "shutdown means loss" in industrial production. To this end, we have established two major service outlets in East China and South China, providing 48-hour emergency response with a spare parts inventory coverage rate of over 90% to ensure rapid resolution of equipment failures. At the same time, our professional technical team can conduct on-site surveys of working conditions and provide full-process customized services from selection, installation to operation and maintenance. Whether you are a small and medium-sized shoe material factory pursuing cost optimization, a photovoltaic enterprise needing high stability, or a packaging manufacturer meeting medical-grade standards, you can find a suitable solution in our water circulation vacuum system solutions. Click [Online Consultation] now, submit your working condition parameters, and get an exclusive selection plan to make the vacuum system an "accelerator" for production efficiency improvement!

(Note: Some content in this document may be AI-generated)