Abstract
      In 2022, with the localization research and development of nuclear magnetic resonance equipment and proton therapy equipment, the sealing of key parts in medical equipment is facing a series of challenges such as corrosion resistance, low temperature resistance, high reliability, and low bolt pre tightening force. Shanggu's engineering team has broken through the use of aluminum alloy materials to manufacture runway type external opening spring reinforced metal C-rings. This type of product enables the commonly used stainless steel spring reinforced metal C-ring to achieve sufficient compression deformation under limited bolt locking force, thereby providing reliable sealing performance on the equipment. Especially suitable for sealing areas of some aluminum flange structures.
      After a series of rigorous tests, the results showed that the sealing scheme not only achieved a sealing effect beyond expectations, but also ensured high reliability sealing.

Application Challenge

      Due to the requirements of high-purity sealing, chemical corrosion resistance, and low leakage rate, ensuring long-term stable sealing performance is crucial for the reliable operation of equipment. The sealing of critical parts in medical equipment faces many challenges, including:

·Working temperature: The sealing component needs to maintain good sealing performance within the temperature range of -270 ℃ to 15 ℃;

·Work pressure: Seals need to achieve effective sealing within a pressure range from high vacuum to atmospheric pressure;

·Sealing medium: The sealing element should have chemical corrosion resistance and be able to provide reliable sealing for special liquid/gas media;

·High purity sealing requirements: During long-term operation, the sealing components must not produce any precipitates to avoid contaminating the sealing environment;

·Low leakage rate requirement: It is necessary to ensure that the leakage rate is below 1 × 10^-10 Pa · m3/s;

·Self regulating ability: The design of the spring can automatically compensate for sealing failure caused by material wear or temperature changes during use, maintaining a continuous sealing effect.

Application Effect

The sealing effect exceeded expectations 
      After testing, the application of Shanggu sealing scheme reduced the leakage rate of the system to 1 × 10-11 Pa · m3/s, and no leakage was detected under ultra-high vacuum test pressure.
High reliability 
      Compared to other metal seals, using aluminum alloy material to manufacture runway type external opening spring reinforced metal C-rings only requires lower bolt tightening loads, making it possible to replace common non-metallic seals such as rubber. It has shown significant advantages in low temperature resistance, corrosion resistance, high-purity sealing, and ultra-low leakage rate, effectively ensuring sealing performance and ensuring the safety and stability of medical/scientific/semiconductor equipment in use.

Solution-Product Display

About Sonkit
        Sonkit (Shanghai) Industrial Technology Co., Ltd. is a leading source factory for metal seals in China, focusing on the research and manufacturing of high-performance metal seal solutions. The company holds AS9100D, ISO 9001:2015, Nadcap, and D-U-N-S certifications, and has been awarded the titles of "High tech Enterprise" and "Specialized and Innovative Enterprise".
        Main products: A full range of metal seals including metal O-rings, C-rings, W-rings, U-rings, V-rings, and spring energy storage seals.
        Service areas: high-end manufacturing industries such as aerospace, oil and gas, nuclear power, semiconductors, and hydrogen energy, with products exported to multiple countries and regions around the world.
        Official website: www.sonkit.cn
        Address: Building 4 (D), No. 123 Xinjin Road, Qingpu District, Shanghai
        Phone: 15821628660
        Email: info@sonkit.cn