壓力增能

橫截面和壁厚設計用於控制載荷

可用於內部、外部和軸向壓力

材料範圍（合金X750、718、Waspaloy和其他特殊金屬）

鍍層和塗層：銀、金、PTFE（其他可用）

溫度範圍：從-273°C到730°C（-460°F到1350°F）

壓力範圍：從中等真空到2000巴（29,008 PSI）

泄漏範圍：大約≤ 25 cc/min @ 50 psig氮氣每英寸直徑到≤ 1 x 10-4 std.cc/sec空氣。實際泄漏率將取決於密封載荷、表面處理和表面處理。

可選特性

可用的摩擦學耐磨塗層

可提供定制形狀和尺寸

石油和天然氣：下井鑽探/MWD

工業渦輪機：燃料系統/噴嘴

閥門：本體/蓋子，後座密封

航空航天/太空：渦輪泵、燃料系統、噴嘴/噴射器、低溫技術

汽車：渦輪增壓器、排氣

摘要：

隨著摩托車、汽車、重型卡車、機械設備等行業的快速發展，氣體的供需迅速增加。對於重型卡車的氣體使用，為了實現安全和效率，並確保駕駛的舒適性和安全性。因此，本文介紹了金屬V型環在重型卡車氣體出口的應用，包括氣體出口V型環的設計、製造材料、製造工藝和應用原則。同時，對V型環的性能進行了測試和分析，證明其在重型卡車氣體系統中的優異性能，為行業提供了更多選擇。

關鍵字:

金屬V型環；重型卡車；氣體系統，氣體出口；應用

一、 介紹

隨著國家環保政策的逐步推行，物流行業逐漸朝著使用LNG（液化天然氣）以實現節能和環保的方向發展。與此同時，物流行業的競爭越來越激烈，重型卡車的運行穩定性、舒適性和安全性對產品提出了更高的要求。因此，重型卡車氣體出口的穩定性已成為物流行業關注的熱點話題。為了解決這一問題，金屬V型環成為了一個重要的解決方案，並且被越來越多地應用。

二、金屬 V 環的設計與製造

金屬 V 環是一種密封結構元件，其結構形式類似於 V 形彈性體。當外力作用於環上或 "V" 彎曲角度發生變化時，V 環會在一定範圍內形成壓力並將其傳遞到周圍的密封區域。

在重型卡車的氣體系統中，V環的最重要點是它們必須穩定且可靠。在氣體系統的應用中，V環的設計和製造必須嚴格遵循標準，以確保其可靠的品質。

V環的設計需要根據不同重型卡車的要求進行調整，以確保在組裝過程中良好的密封性。

在製造金屬 V 環時，應使用高品質的金屬材料。一般來說，可以使用鍍鋅鋼板、不銹鋼板、硬鋁、黃銅、鈦合金等材料。其中，316L 不銹鋼具有良好的耐腐蝕性，適用於化學、航空航天、食品和製藥行業。它也是重型卡車氣體系統常用的製造材料。

三、金屬 V 環的製造過程

金屬 V 環的製造過程直接影響其質量。一般來說，製造過程包括多個階段，如切割、成型和成型。

1. 切割

在金屬 V 型環的生產中，第一步是選擇良好的製造材料。然後，根據不同的需求和設備架構開發相應的模具，並使用切割、開模或套筒拆卸的方法進行切割。

2. 形成

切割後，金屬板將根據模具的要求嚴格成型。首先，需要進行定量沖孔以清空板的中心並形成圓環的基本形狀。然後，通過模具彎曲和壓制邊緣以形成最終的「V」形開口。

3. 形成

所謂的成形是指對 V 型環進行進一步的機械化加工，使其成為標準的形狀和尺寸，然後通過加工、熱處理和表面處理等工序進行加工和加固。

四、金屬 V 型環在氣體出口中的應用

金屬 V 環主要用於密封氣體系統，確保氣體不會洩漏，並在難以密封的情況下發揮良好的作用。

應用原理：V型環的內側為V型，外側為圓形，屬於彈性結構。當外部壓力作用於V型環時，V型環會收縮，當壓力消失時，它可以恢復到原始狀態。此外，在與閥門結合的過程中，V型環確保了密封的可靠性。

五、性能測試與分析

為了驗證金屬 V 型環在重型卡車氣體系統中的性能，對其性能進行了測試。實驗測試顯示，金屬 V 型環具有良好的可靠性和穩定性，並且可以在多次壓縮和減壓過程中持續保持其密封性能。此外，其耐壓能力相對較強，並且在高強度壓力下仍能確保密度。

六、結論與展望

金屬 V 環在重型卡車燃氣系統中的應用是一項重要技術，其可靠性和穩定性已得到驗證。未來，隨著行業的發展和技術的進步，這項技術將進一步提升生產質量，提高整車的可靠性和安全性。

解鎖生物醫學高端密封的新領域！上海瑞道的春季增強金屬C型密封環重塑醫療設備的可靠性

在生物醫學領域，高端醫療設備的每一個精確操作對患者的生命、健康和治療效果都是至關重要的。上海Raido's painstakingly developed spring - reinforced金屬 C 形密封圈（鍍金/鍍銀）已成為理想的選擇用於 高端密封 在生物醫學領域中表現卓越。專為先進醫療CT系統和其他高端醫療應用，它們符合嚴格的要求並保障設備的穩定運行。

我們春季 - 強化金屬 C 形密封圈 擁有四大核心優勢。它們的高 - 溫度抗拒力卓越，使其能在極端溫度下可靠運行。高達750°C. 無論是在高溫 長期運行所產生的環境CT 設備 或高溫 質子治療系統的條件，它們始終可以保持密封性能並確保設備穩定運行。高壓抵抗力同樣令人印象深刻，能夠承受高達巨大的壓力1500 巴, 提供堅固可靠的密封以供CT 設備 under 高壓條件，消除對設備運行的任何擔憂。耐腐蝕性也不容小覷。由特殊耐腐蝕材料製成並經過處理金/銀電鍍, 它們仍然可以在醫療設備中常見的酸和鹼等惡劣化學環境中長時間使用，顯著降低設備維護成本和更換頻率。超高真空密封性能是一大亮點。擁有卓越的 漏氣率低至 1×10⁻¹⁰ Pa·m³/s, 他們可以在保持極高的精確度和穩定性方面超高真空應用, 為質子治療系統中的關鍵組件如加速器創造一個穩定可靠的工作環境，X - 光管, 和 CT影像設備中的探測器抱歉，我無法處理該請求。

這個密封環在生物醫學領域有廣泛的應用。對於質子治療系統來說，它是確保加速器和關鍵組件準確性的關鍵，保證質子束的精確傳輸和聚焦，並有助於提高癌症治療的有效性。CT影像設備，它有效地提高了關鍵組件的可靠性，例如X - 光管 和探測器，減少外部干擾，使成像更清晰，診斷更準確。此外，它也適合於高端醫療設備 例如 MRI 系統 和放射影像工具. 無論是抵抗外部磁場干擾還是防止液體洩漏，它都能輕鬆應對，完全滿足密封要求的高端醫療設備。

上海雷道一直以創新為驅動力，致力於為生物醫學領域提供更好的密封解決方案。選擇我們春季 - 強化金屬 C 形密封圈 意味著選擇保障醫療設備的可靠性和穩定性。讓我們攜手共創生物醫學領域的美好未來！

Stainless steel 316L metal O-rings are critical sealing components in melt filters. Their application is highly compatible with the process characteristics and operating requirements of melt filtration, playing an irreplaceable role in ensuring stable equipment operation, filtration efficiency, and product quality. This article provides a detailed analysis from the aspects of application background, core functions, compatibility analysis, practical application scenarios, and precautions: 

## I. Application Background: Operating Characteristics and Sealing Requirements of Melt Filters  

Melt filters are widely used in industries such as plastics, chemical fibers, rubber, food, and pharmaceuticals. They are primarily used to filter impurities, gel particles, or unmelted substances from molten materials (e.g., polymer melts, resins, food melts) to ensure the quality of subsequent processing (e.g., spinning, film extrusion, injection molding). Their core operating characteristics impose stringent requirements on sealing components: 

1. **High-temperature environment**: Melt temperatures typically range from 150°C to 400°C (e.g., polyester melts at approximately 280–300°C, nylon melts at 240–260°C), with some engineering plastic melts reaching even higher temperatures. 

2. **High-pressure conditions**: Materials must maintain a certain pressure (usually 0.5–3 MPa) during filtration to drive the melt through the filter medium, avoiding pressure fluctuations that could destabilize flow rates. 

3. **Medium properties**: Melts are mostly viscous polymer materials, some containing trace corrosive additives (e.g., antioxidants, flame retardants). Additionally, sealing materials must not contaminate the melt (especially in food and pharmaceutical fields). 

4. **Frequent disassembly needs**: Filters require regular replacement of filter elements. Sealing components must withstand repeated mechanical stress from disassembly and quickly restore reliable sealing after each operation. 

## II. Core Functions of Stainless steel 316L metal O-rings  

In melt filters, Stainless steel 316L metal O-rings are mainly used for static sealing of critical interfaces such as **filter body and end cover, filter cavity and flange, and inlet/outlet joints**. Their core functions include: 

1. **Preventing melt leakage**: Through rigid metal sealing and interference fit, they block high-temperature, high-pressure melt from seeping through sealing gaps, avoiding material waste, equipment contamination, and safety hazards (e.g., burns from contact with high-temperature melt). 

2. **Ensuring stable filtration pressure**: Seal failure can cause pressure loss, affecting melt flow rate through the filter medium and filtration efficiency. The high strength and deformation resistance of stainless steel O-rings maintain stable system pressure. 

3. **Avoiding medium contamination**: Stainless steel (e.g., 316L) has excellent chemical inertness, does not react with melts, and does not release impurities at high temperatures, meeting cleanliness requirements in food, pharmaceutical, and other fields. 

4. **Adapting to frequent maintenance**: Compared to rubber or non-metallic seals, stainless steel O-rings offer better wear resistance and fatigue resistance, retaining sealing performance after multiple disassembly cycles, thus reducing maintenance frequency and costs. 

## III. Compatibility Analysis of Stainless steel 316L metal O-rings  

### 1. Material Compatibility: Meeting High-Temperature and Corrosion Resistance Needs  

- **High-temperature stability**: Commonly used 304 and 316 stainless steels can operate stably below 400°C for long periods. Their melting points (1300–1400°C) are much higher than the operating temperatures of melt filters, preventing softening, aging, or failure due to high temperatures (rubber seals typically age above 200°C and cannot withstand long-term high temperatures). 

- **Corrosion resistance**: 316 stainless steel, containing molybdenum, exhibits stronger resistance to trace acidic/alkaline additives, moisture, or residual solvents in melts. It is particularly suitable for filtering engineering plastic melts with corrosive components (e.g., PVC, fluoropolymers). 

### 2. Structural and Sealing Principle Compatibility: Addressing High Pressure and Surface Defects 

- **Interference sealing of solid structure**: Stainless steel 316L metal O-rings have a solid circular cross-section. During installation, they form an interference fit with the seal groove, undergoing slight elastic deformation under preload to fill micro-scratches and roughness defects on the sealing surface, creating an initial seal. As system pressure increases, melt pressure further compresses the O-ring, enhancing contact stress on the sealing surface (the "self-tightening seal effect"), which adapts to the high-pressure conditions of filters. 

- **Reliability of metal-to-metal sealing**: Compared to the "elastic sealing" of rubber O-rings, the "metal-to-metal" sealing of stainless steel O-rings is more resistant to extrusion—they are less likely to be damaged by extrusion through gaps under high pressure, making them particularly suitable for high-pressure sealing of large-diameter interfaces such as filter end covers. 

### 3. Mechanical Performance Compatibility: Withstanding Disassembly and Long-Term Use 

- **High strength and fatigue resistance**: Stainless steel has high tensile strength (approximately 520 MPa for 304 stainless steel), making it resistant to plastic deformation or fracture under repeated preload from disassembly. Its service life is much longer than that of non-metallic seals, reducing the cost of frequent replacements. 

- **Dimensional stability**: Stainless steel has a low thermal expansion coefficient (approximately 17×10⁻⁶/°C), resulting in minimal dimensional changes under high-temperature conditions. This maintains a stable interference fit, preventing increased sealing gaps and leakage due to thermal expansion and contraction. 

## IV. Practical Application Scenarios and Typical Cases  

1. **Plastic extrusion melt filters**:  

   In PE and PP film extrusion production lines, melt filters remove impurities from raw materials to ensure film transparency. Stainless steel O-rings are used for flange sealing between the filter housing and filter cartridge, withstanding melt temperatures of 200–300°C and pressures of 1–2 MPa to prevent production interruptions and material waste caused by melt leakage. 

2. **Chemical fiber spinning melt filters**:  

   In polyester and nylon spinning processes, melt purity directly affects yarn quality (e.g., breakage, fuzz). 316 stainless steel O-rings provide sealing for high-precision filters, not only withstanding 280°C temperatures but also avoiding melt contamination and spinning defects due to their clean, non-leaching properties. 

3. **Food-grade melt filters**:  

   In filtering food melts such as chocolate and syrup, compliance with FDA and other food contact standards is required. 304 stainless steel O-rings are non-toxic and non-migratory, and they withstand high-temperature disinfection (e.g., steam cleaning), adapting to hygiene requirements in the food industry. 

## V. Application Precautions  

1. **Sealing surface processing precision**: Stainless steel O-rings require high surface roughness of the sealing surface (typically Ra ≤ 1.6 μm). Surface scratches or depressions can cause seal failure, so the processing quality of seal grooves and flange surfaces must be ensured. 

2. **Preload control**: Insufficient preload leads to poor initial sealing, while excessive preload may cause over-deformation of the O-ring or damage to the sealing surface. 

3. **Material selection**: 304 stainless steel is suitable for general conditions, while 316L stainless steel is preferred for corrosive media or high cleanliness requirements. Avoid use in extremely corrosive environments containing sulfur or chlorine (special coatings or alloy materials may be required). 

4. **Installation and maintenance**: Avoid scratching the O-ring with sharp edges during installation. Regularly inspect the sealing surface for wear or corrosion, and replace the O-ring promptly if deformation or cracks are found. 

## VI. Conclusion  

FKM 橡膠墊圈 

FKM (氟彈性體)，也稱為氟橡膠，是一種具有高氟含量的合成橡膠，由氟化單體共聚合而成。其分子結構中大量的 C-F 鍵賦予了材料優異的化學抗性、高溫抗性和抗老化性能。因此，FKM 橡膠墊圈廣泛應用於對密封性能要求嚴格的工業場景。以下是從核心性能、典型應用場景、優勢和限制等方面的詳細介紹： 

## I. FKM 橡膠墊圈的核心性能 

FKM 橡膠的分子結構以穩定的碳-氟鍵為主，具有強大的化學惰性和優異的物理及機械性能，具體表現如下： 

### 1. 化學抗性 

- **廣譜中等抗性**: 它對大多數有機溶劑（如酮、酯、醚、芳香烴）、強酸（如硫酸、硝酸）、強鹼、油脂、液壓油、燃料油（包括汽油、柴油、航空煤油）和腐蝕性氣體（如氯、氟）具有強大的抵抗力。它不易膨脹、硬化或降解。 

- **適應特殊環境**:它可以在強氧化環境中（例如含有臭氧和過氧化氫的場景）保持穩定的性能，使其成為少數幾種適用於強腐蝕性介質密封的橡膠材料之一。 

### 2. 高溫抗性 

- **長期運行溫度範圍**:它可以在 **-20℃~200℃** 的範圍內穩定運行很長時間。一些高性能等級（例如全氟醚橡膠）可以承受短期溫度高達 260℃ 甚至 300℃，遠超過普通橡膠（如 EPDM 和氰綸橡膠）的耐熱極限。 

- **高溫穩定性**: 在高溫環境中，軟化、流動或分解並不容易，且具有低壓縮變形率（通常在長期高溫下<30%），這可以持續確保密封效果。 

### 3. 抗老化與耐候性 

- **抗老化能力**:它對氧氣、臭氧、紫外線和氣候老化（如陽光、雨水和濕度變化）具有強大的抵抗力。經過長期使用後，它不易出現開裂、硬化或性能衰退，其使用壽命遠長於普通橡膠墊圈。 

- **輻射抗性**: 某些FKM等級具有一定的輻射抗性，可用於低劑量輻射環境中的密封需求。 

### 4. 物理和機械性質 

- **密封性能和彈性**:它具有良好的彈性和壓縮回彈性，能夠緊密貼合密封面。即使在有振動或壓力波動的工作條件下，它也能保持可靠的密封，並降低洩漏的風險。 

- **耐磨性和強度**: 它具有適中的表面硬度，耐磨性優於EPDM，並且具有高拉伸強度和撕裂強度，能夠適應某些機械應力。 

## II. FKM 橡膠墊圈的典型應用場景 

基於上述優秀特性，FKM 橡膠墊圈主要用於對密封性能、耐高溫和耐腐蝕性要求極高的工業領域： 

### 1. 石油化工與精細化工產業 

- 用於密封反應器、儲罐、管道法蘭和閥門，適應各種腐蝕性介質（如酸鹼溶液、有機溶劑、催化劑）和高溫工作條件（如蒸餾和聚合過程）。 

- 適應油氣提取設備的密封（如鑽井平台密封）、煉油管道和熱交換器，抵抗原油、重油及各種精煉副產品的腐蝕。 

### 2. 汽車與交通 

- 汽車引擎系統:用於密封高溫元件，例如燃油噴射系統、變速箱和渦輪增壓器，能夠承受來自引擎油、高溫冷卻液和燃料的長期侵蝕。 

- 新能源汽車:適應電池冷卻系統和電動機密封，抵抗冷卻劑（如乙二醇溶液）和高溫環境，同時滿足耐壓和絕緣要求。 

- 航空航天:用於密封飛機引擎燃油系統、液壓系統和高溫管道，適應高海拔低溫、地面高溫和航空燃油等惡劣環境。 

### 3. 機械製造與工業設備 

- 高溫機械:例如用於工業爐、烘乾機和蒸汽管道的密封墊片，能夠承受持續的高溫和熱循環衝擊。 

- 液壓和氣壓系統： 用於密封高壓液壓設備和氣動閥門，抵抗液壓油和壓縮空氣的長期影響，並且在高溫下不易老化和失效。 

### 4. 電子與半導體產業 

- 半導體製造設備:例如，能夠抵抗氫氟化物（HF）和氯等腐蝕性氣體，以及高溫工藝環境的蝕刻機和離子植入機的密封元件。 

- 電子元件密封:用於高溫電子設備（如電源模組）的防水和防塵密封，適應設備運行過程中的高溫環境。 

### 5. 食品和製藥行業（特定等級） 

- 符合 FDA（美國食品藥品監督管理局）或 USP（美國藥典）標準的食品級 FKM 垫圈可用於密封高溫滅菌設備（如蒸汽滅菌器）和食品加工機械。它們能夠抵抗高溫蒸汽和清潔劑的腐蝕，無毒，且不釋放有害物質。 

## III. FKM 橡膠墊片的優勢與限制 

### 優勢 

- **極強的化學抗性**:適應大多數酸、鹼、溶劑和腐蝕性介質，應用範圍遠超普通橡膠； 

- **卓越的高溫抗性**: 可在200℃以上長時間使用，滿足高溫工業場景的需求； 

- **抗衰老和長壽命**:優異的臭氧和紫外線抗性，不易在戶外或長期使用中失效，降低維護成本； 

- **高密封可靠性**:良好的彈性和壓縮回彈，能在振動和壓力波動條件下保持有效密封。 

### 限制事項 

- **有限的低溫性能**: 普通FKM在-20℃以下容易硬化並失去彈性，低溫密封性能下降（需要選擇特殊低溫級別，成本較高）； 

- **高成本**:原材料的價格遠高於EPDM和氰丁橡膠等通用橡膠，使其不適合在低成本和非苛刻工作條件下的密封需求； 

- **極性溶劑的限制**:雖然它對大多數介質具有抗性，但在一些強極性溶劑（如低分子酮）中可能存在膨脹的風險，因此需要提前進行相容性測試； 

- **困難處理**: 硫化成型過程要求高，溫度和時間需要精確控制，否則可能會影響性能。 

## IV. 選擇考量 

- **媒介相容性確認**:根據使用環境中的特定媒介（如酸、鹼、溶劑類型），通過製造商提供的化學耐受性數據表或實際測試來驗證相容性； 

- **溫度範圍匹配**: 澄清工作條件的長期使用溫度和短期峰值溫度，並選擇與耐溫等級相對應的FKM等級（例如普通FKM或全氟醚橡膠）； 

- **考慮低溫需求**:如果工作條件涉及低溫環境（例如低於 -20℃），應選擇改性低溫 FKM 或全氟醚橡膠，以避免墊圈硬化和失效； 

- **成本與性能之間的平衡**: 在非高溫和非強腐蝕性場景中，可以優先選擇成本效益較高的橡膠（如EPDM和氰綸橡膠）。FKM更適合惡劣的工作條件。 

## 摘要 

憑藉「耐化學性、高溫耐受性和抗老化」三大核心優勢，FKM 橡膠墊圈已成為工業密封領域應對惡劣環境的「高端解決方案」。它們在石油化工、汽車和半導體等高需求場景中尤為不可或缺。儘管成本相對較高，但其超長的使用壽命和可靠的密封性能可以顯著降低設備維護的風險，使其成為密封高價值設備的理想選擇。

Raido Spring-Energized Hollow Metal ORings: Innovative Sealing Solution​

The newly launched spring-reinforced metal hollow Oring (also referred to as spring energized metal oring seals) by Raido is an innovative upgraded product developed based on the basic hollow metal oring seal. As a high-performance sealing component with unique structural design and outstanding functionality, it combines the advantages of traditional spring-energized hollow metal orings while achieving significant upgrades in sealing performance and working condition adaptability. Below is a comprehensive detailed introduction:​

1. Structural Features​

1.1 Core Structural Design​

The traditional spring-energized hollow metal oring is typically formed by bending a thin-walled seamless tube into a circular shape, with its two ends butt-welded to create a hollow interior. Raido’s upgraded product inherits this hollow structure while elevating it with a key innovation: high-performance elastomers (springs) are precisely installed in the inner cavity. Through the elastic support of the springs, the product forms a unique composite sealing structure of "metal skeleton + elastic compensation" — the metal hollow body serves as a rigid skeleton to ensure structural stability and resistance to extreme conditions, while the embedded springs provide continuous elastic force, addressing the limitations of traditional sealing components.​

1.2 Material Matching​

To maximize performance, Raido scientifically matches materials for the metal body and springs:​

• Metal body: Options include stainless steel, high-temperature alloys, and other materials, selected based on specific application requirements (e.g., corrosion resistance, high-temperature tolerance);​

• Springs: Made of special elastic alloys, ensuring excellent elasticity, fatigue resistance, and compatibility with the metal body to avoid issues like galvanic corrosion.​

2. Performance Advantages​

Building on the inherent strengths of traditional spring-energized hollow metal orings, Raido’s product achieves further breakthroughs in sealing efficiency and durability:​

2.1 High Elasticity and Superior Recovery Capacity​

Like traditional models, the embedded springs enable the oring to quickly rebound after significant compressive deformation, effectively compensating for wear, thermal deformation, or assembly errors that could degrade sealing performance. This ensures long-term stability even in dynamic working environments.​

2.2 Enhanced Sealing Reliability (Key Innovation)​

A standout advantage of Raido’s design is its ability to address sealing surface defects. When the sealing surface has minor scratches, unevenness, or other flaws, the springs generate continuous and uniform compensating force through their own elasticity. This force pushes the metal body to closely fit the sealing surface, effectively offsetting various defects on the surface, greatly reducing leakage risks, and delivering far better sealing performance than traditional hollow metal orings (which often fail to seal properly on imperfect surfaces).​

2.3 Strong High-Pressure Resistance​

The "metal skeleton + spring" structure significantly improves pressure collapse resistance. While traditional spring-energized hollow metal orings can handle pressures up to 40MPa (with some ultra-high-pressure models reaching over 100MPa), Raido’s product, through precise regulation of spring strength, can withstand extreme pressure conditions ranging from ultra-high vacuum to a maximum of over 200MPa. It maintains reliable sealing whether under internal or external pressure, making it suitable for ultra-high-pressure scenarios.​

2.4 Low Compression Set​

During long-term use, the product exhibits minimal compression set — the metal body retains its shape stability, and the springs do not lose elasticity due to fatigue. This ensures consistent sealing performance over time, reducing equipment maintenance and replacement costs caused by seal failure.​

2.5 Excellent Adaptability to Harsh Environments​

The metal body itself provides inherent resistance to high/low temperatures and corrosion, and when combined with the reinforcing effect of the springs, Raido’s oring excels in extreme environments:​

• It easily copes with temperature ranges from an ultra-low -196℃ (matching the low-temperature tolerance of traditional models for cryogenic media like liquid oxygen/liquid nitrogen) to an ultra-high temperature above 1000℃ (surpassing the high-temperature limit of some traditional models). It maintains stable sealing performance even during high-low temperature alternating cycles;​

• The corrosion-resistant metal body (e.g., stainless steel, high-temperature alloys) and compatible springs ensure resistance to strong corrosive media such as acids, alkalis, seawater, and radioactive substances, avoiding seal failure due to corrosion.​

3. Application Scenarios​

Leveraging its "extreme condition adaptability" — a core advantage of spring-energized hollow metal orings — Raido’s product is widely applicable in high-end fields with stringent sealing requirements, replacing ordinary rubber orings (poor resistance to high/low temperatures and corrosion) and simple metal orings (poor low-pressure sealing and no wear compensation). Key application areas include:​

3.1 Extreme Temperature Conditions​

• Low-temperature fields: Sealing for liquid oxygen/liquid nitrogen storage tanks, valves in LNG (liquefied natural gas) transmission pipelines, and low-temperature propellant systems in aerospace (temperatures as low as -196℃ to -270℃);​

• High-temperature fields: Sealing for boiler flue dampers, gas turbine shaft ends, automotive exhaust treatment systems, observation windows of industrial kilns, and high-temperature components in aerospace (temperatures up to 600℃ to over 1000℃).​

3.2 High/Low Pressure and Vacuum Conditions​

• High-pressure fields: Sealing for high-pressure cylinder pistons in hydraulic systems, high-pressure wellheads of oil drilling platforms, pump bodies of high-pressure water jets, and ultra-high-pressure valves in high-end equipment (pressures ranging from 20MPa to over 200MPa);​

• Vacuum fields: Sealing for semiconductor vacuum coating machines, vacuum drying oven doors, and aerospace vacuum chambers (vacuum degree up to 10⁻³Pa to 10⁻⁵Pa).​

3.3 Strong Corrosion Conditions​

• Chemical industry: Sealing for inlet/outlet valves of hydrochloric acid/sulfuric acid storage tanks, electroplating tanks, and pesticide production equipment;​

• Marine engineering: Sealing for seawater desalination equipment and hydraulic systems of offshore platforms (resistant to seawater corrosion);​

• Nuclear industry: Sealing for cooling systems of nuclear reactors (resistant to corrosion from radioactive media and high-temperature water);​

Metal Corrugated Reinforced PTFE envelope Gasket (TEFLON + STAINLESS STEEL) Product Description

The metal corrugated  reinforced PTFE envelope Gasket is a composite sealing component that combines the excellent chemical stability of polytetrafluoroethylene (TEFLON) and the high-strength support of stainless steel. With its unique "corrugated  structure + double-layer material" design, it becomes an ideal sealing solution for harsh working conditions in chemical, petroleum, pharmaceutical and other industries.

I. Core Materials: Scientific Integration of Dual Advantages

1、Surface Layer: Polytetrafluoroethylene (TEFLON)

As the direct contact layer of the sealing surface, PTFE material has the characteristic of "the king of corrosion resistance" — it can withstand an extreme temperature range from -200℃ to 260℃, and has no chemical reaction with strong acids (such as hydrochloric acid, sulfuric acid), strong alkalis (such as sodium hydroxide), strong oxidants and various organic solvents, completely solving the leakage problem of traditional gaskets caused by corrosion. At the same time, its ultra-low friction coefficient (only 0.04) can reduce the wear of the sealing surface, and its non-stick surface can avoid medium residue, meeting the cleanliness requirements of the food and pharmaceutical industries.

2、Base Material: Stainless Steel

The corrugated tooth base made of 304 or 316L stainless steel provides strong structural support for the product. The high-strength property of stainless steel (tensile strength ≥ 520MPa) can resist compressive deformation under high-pressure working conditions, while the corrugated tooth design compensates for minor unevenness of the flange surface through the "elastic buffer layer" effect. Even in scenarios with vibration or temperature fluctuation, it can still maintain stable sealing specific pressure, avoiding sealing failure caused by excessive rigidity of the base material.

II. Structural Design: Sealing Innovation of Corrugated Tooth Technology

The product adopts a composite structure of "stainless steel corrugated tooth base + PTFE coating". The peak-valley spacing of the corrugated  is precisely calculated (conventional tooth height: 0.2-0.5mm, tooth pitch: 1-3mm), forming multiple sealing cavities:

• When the flange bolts are tightened, the PTFE surface layer will produce "stepwise deformation" with the compression of the corrugated tooth structure. While filling the flange gap, the peak of the corrugated  forms line contact sealing with the flange surface, greatly improving the sealing specific pressure;

• The corrugated tooth structure of the stainless steel base can effectively disperse pressure, avoiding cold flow phenomenon of PTFE caused by excessive local stress, and prolonging the sealing life;

• The overall structure has both flexibility and rigidity, which can adapt to slight misalignment of the flange during installation, reducing installation difficulty.

III. Performance Characteristics: Core Advantages for Harsh Working Conditions

1.    Wide Temperature Range Sealing: Maintains stable sealing performance in the range of -200℃ (cryogenic working condition) to 260℃ (high-temperature working condition), suitable for scenarios such as refrigeration equipment and high-temperature reaction kettles;

2.       High-Pressure Resistance: Relying on the support of the stainless steel base, it can withstand a maximum working pressure of 30MPa, meeting the sealing needs of oil pipelines and high-pressure valves;

3.       Chemical Inertness: The PTFE surface layer has no corrosion or swelling to almost all chemical media (except molten alkali metals and chlorine trifluoride), suitable for chemical acid-base transportation pipelines;

4.       Long-Term Stability: The corrugated tooth structure reduces the cold flow and creep of PTFE, and the attenuation rate of sealing performance is less than 5% during long-term use (conventional service life: 3-5 years);

5.       Environmental Compliance: The material meets the standards of FDA (U.S. Food and Drug Administration) and RoHS (EU Restriction of Hazardous Substances), and can be used in fields such as food processing and drinking water treatment.

IV. Application Scenarios and Installation & Maintenance

(I) Typical Application Scenarios

• Chemical Industry: Flanges of acid-base storage tanks, feed inlets of reaction kettles, sealing end covers of chemical pumps;

• Petroleum Industry: Valves of oil transmission pipelines, manholes of crude oil storage tanks, sealing surfaces of oil-gas separators;

• Pharmaceutical Industry: Pharmaceutical liquid transmission pipelines, aseptic reaction tanks, sealing doors of freeze dryers;

• Energy Industry: Cooling systems of nuclear power plants, high-temperature steam pipelines of thermal power plants, production equipment for photovoltaic silicon materials.

(II) Installation and Maintenance Points

1. Before installation, clean the flange surface, remove oil stains, impurities and residues of old gaskets to avoid affecting the sealing effect;

        2.  When tightening the bolts, adopt the "diagonal step-by-step tightening" method to ensure uniform force on                    the gasket, avoiding damage to the PTFE surface layer due to local over-tightening;

        3.   If slight leakage occurs after long-term use, properly retighten the bolts (retightening torque shall not exceed                10% of the initial torque) without replacing the new gasket;

        4.  When the medium temperature exceeds 200℃, it is recommended to check the sealing status every 6 months to ensure no deformation of the corrugated tooth structure.

Through "material complementarity + structural innovation", the metal corrugated  reinforced PTFE envelope Gasket perfectly solves the pain point of traditional gaskets being "corrosion-resistant but not pressure-resistant, or pressure-resistant but not corrosion-resistant". It has become a high-end product with both reliability and adaptability in the modern industrial sealing field, providing safe and long-term sealing guarantees for various harsh working conditions.

PTFE (Polytetrafluoroethylene) envelope gaskets, also known as "PTFE encapsulated gaskets," are widely used in industrial sealing applications due to PTFE’s excellent chemical resistance, non-stick properties, and high-temperature stability. Their core design involves a PTFE outer "envelope" that encapsulates a softer, more compressible inner core (e.g., rubber, graphite, or fiber), combining PTFE’s corrosion resistance with the core’s sealing flexibility. 

Below is a detailed classification of PTFE envelope gaskets based on core material, PTFE envelope structure, and application-specific designs, along with their key characteristics and use cases.

 1. Classification by Inner Core Material  

The inner core is critical for achieving effective sealing (since pure PTFE is relatively rigid and prone to creep). Different core materials tailor the gasket’s compressibility, temperature resistance, and cost. 

 2. Classification by PTFE Envelope Structure  

The design of the PTFE outer layer affects the gasket’s sealing performance, installation ease, and resistance to "cold flow" (PTFE’s tendency to deform under pressure over time). 

 2.1 Full Envelope (Standard Type)  

Design: The PTFE sheet fully wraps the inner core, with the edges of the PTFE sealed (e.g., by heat welding or mechanical crimping) to prevent the core from leaking or being exposed to the medium. 

Advantages: Maximum protection of the core from corrosive fluids; suitable for full-face flange sealing. 

Limitation: Slightly lower compressibility than partial envelope types (due to full PTFE coverage). 

Use Case: Most industrial applications (chemical tanks, pipelines, pumps) where the medium is aggressive.

 2.2 Partial Envelope (Exposed Core Type)  

Design: The PTFE envelope covers only the sealing face (the area in contact with the flange) and the outer perimeter of the core; the inner bore (hole) of the gasket leaves the core partially exposed. 

Advantages: Higher compressibility (since less PTFE restricts the core’s deformation); easier to install in tight spaces. 

Limitation: The exposed core may be vulnerable to corrosion if the medium is highly aggressive. 

Use Case: Low-to-moderate corrosion environments (e.g., water treatment, HVAC systems) where compressibility is prioritized.

 2.3 Reinforced Envelope (Anti-Creep Type)  

Design: The PTFE envelope is reinforced with a thin layer of inert material (e.g., glass fiber, carbon fiber, or metal mesh) embedded in the PTFE matrix. 

Advantages: Significantly reduces PTFE cold flow and creep; maintains sealing integrity under long-term pressure or temperature cycles. 

Limitation: Higher cost than standard PTFE envelopes. 

Use Case: High-pressure/high-temperature applications (e.g., steam turbines, chemical reactors) where creep resistance is critical.

 3. Classification by Flange Type & Shape  

PTFE envelope gaskets are customized to match common flange designs, ensuring proper fit and sealing. 

 4. Specialized PTFE Envelope Gaskets  

These are engineered for niche industries with strict requirements (e.g., food safety, ultra-purity, or extreme environments). 

 4.1 FDA-Compliant Gaskets 

Design: Uses food-grade PTFE (e.g., PTFE meets FDA 21 CFR Part 177.1550) and inner cores (EPDM, Silicone) certified for food contact. 

Use Case: Food & beverage processing (dairy, brewing), pharmaceutical manufacturing (drug synthesis), and cosmetics production.

 4.2 High-Purity (Ultra-Clean) Gaskets  

Design: Made with virgin PTFE (no additives) and a core of high-purity graphite or PTFE foam. The envelope is polished to minimize particle shedding. 

Use Case: Semiconductor manufacturing (ultra-pure water systems), laboratory equipment, and biotech (cell culture reactors).

 4.3 Low-Temperature Gaskets  

Design: Inner core of low-temperature-resistant materials (e.g., silicone rubber, expanded PTFE) to maintain flexibility at -200°C to -50°C. 

Use Case: Cryogenic applications (LNG storage, liquid nitrogen pipelines).

 Summary of Key Selection Factors  

To choose the right PTFE envelope gasket, consider: 

1. Medium Properties: Corrosiveness (dictates PTFE grade and core material). 

2. Operating Conditions: Temperature (graphite core for high temp; silicone for low temp) and pressure (reinforced envelope for high pressure). 

3. Flange Type: Full-face vs. ring-type, standard vs. custom shape. 

4. Industry Standards: FDA, ASME, or ISO compliance (for regulated sectors like food/pharma). 

By aligning these factors with the classifications above, you can ensure optimal sealing performance and long service life.

Detailed Introduction to CIPP Type Double-Stage Single-Liner Metal Seal

1. Core Design and Performance Advantages of the Product

The CIPP Type Double-Stage Single-Liner Metal Seal has become a preferred sealing solution for extreme environments, thanks to its double-stage multi-layer metal composite structure. This structure fundamentally ensures the reliability and effectiveness of the seal under harsh conditions such as high temperature, ultra-high vacuum, and high-energy particle beam radiation, providing stable sealing support for high-demand industrial scenarios.

Its innovative proprietary knife-edge design is a major highlight. It not only accurately compensates for deviations in flange flatness, significantly improving installation convenience and ensuring a secure fit between the seal and the flange but also enhances sealing performance while simplifying the installation process. This makes the overall sealing operation more efficient and reliable, effectively reducing construction difficulty and time costs.

2. Groundbreaking Performance Compared with Traditional Seals

In terms of requirements for flange surface roughness, traditional seals usually require the flange surface roughness (Ra) to be controlled between 0.2-0.4, which imposes extremely high demands on flange machining accuracy. However, the CIPP Type Double-Stage Single-Liner Metal Seal launched by Sonkit breaks this limitation. Even if the flange surface Ra value is as high as 0.8-1.6, it can still achieve effective sealing. This greatly reduces the strict requirements for flange machining and lowers the early-stage machining costs of equipment.

At the same time, the knife-edge design of this seal also significantly reduces the demand for bolt preload. This advantage not only reduces the load on the bolts, extending their service life but also lowers the risk of seal failure caused by improper preload control during installation, further improving the stability of the sealing system.

In terms of leakage rate control, professional test verification shows that the leakage rate of the system using Sonkit's CIPP Type Double-Stage Single-Liner Metal Seal can be reduced to 1E-11 mbarl/s. This value far exceeds the original design requirement of 1E-10 mbarl/s, representing a qualitative leap in sealing performance and providing strong technical support for scenarios with high sealing requirements.

3. Typical Application Scenarios

With its outstanding performance, the CIPP Type Double-Stage Single-Liner Metal Seal is widely used in high-end fields with extremely strict sealing requirements, including:

1.       Fusion Reactors: As a key sealing component for fusion reactions, it needs to maintain sealing integrity under extreme working conditions to ensure the safe and stable operation of the reactor. The double-stage multi-layer structure and low leakage rate characteristics of this seal perfectly meet its requirements.

2.       Tokamak Devices: Tokamak devices have complex structures and require highly specialized and precise sealing solutions. This seal can adapt to their complex design while meeting special needs such as plasma confinement and neutron radiation resistance.

3.       Ultra-High Vacuum Applications: In ultra-high vacuum environments, seals need to maintain excellent sealing performance for a long time. The ultra-high vacuum adaptability of this product makes it an ideal choice for such applications.

4.       Laser and Radio Frequency Guidance Systems: These systems have strict requirements for the reliability and stability of seals. This seal can ensure that the system is not disturbed by the external environment during operation, safeguarding guidance accuracy and system performance.

4. Adaptation to Core Performance Requirements in Application Scenarios

1.       Adaptation to Extreme Operating Temperatures: The seal assembly can always maintain structural and sealing integrity within a wide temperature range of -50°C to 350°C. Whether it is material stability in low-temperature environments or deformation resistance in high-temperature environments, it can meet the usage requirements of extreme temperature scenarios.

2.       Guarantee for Plasma Confinement: In scenarios involving plasma confinement such as Tokamak devices, the seal can operate reliably in strong magnetic fields, effectively blocking external interference, ensuring plasma confinement effects, and providing a stable sealing environment for relevant experiments and production processes.

3.       Neutron Radiation Resistance: For scenarios such as fusion reactors that need to withstand neutron radiation, the sealing system can be exposed to neutron radiation environments for a long time without a decline in sealing performance or leakage caused by radiation, ensuring the long-term safe operation of equipment.

4.       Adaptation to Ultra-High Vacuum Environments: In ultra-high vacuum application scenarios, the seal has excellent vacuum retention capability and can maintain stable sealing performance in ultra-high vacuum conditions for a long time, avoiding the impact of seal failure on the vacuum environment.

5.       Adaptability to Complex Structures: Facing equipment with complex structures such as Tokamak devices, this seal, relying on its highly specialized design and precise manufacturing process, can perfectly adapt to the complex structure of the equipment, ensuring reliable sealing in complex installation environments.

A Tri-Clamp Gasket, also known as a tri-lobe gasket or sanitary gasket, is a type of sealing gasket specifically designed for sanitary connections. Below is a detailed introduction to it:

- **Structural Design**: A Tri-Clamp Gasket is typically used in conjunction with clamp fittings. Its assembly consists of two clamps, one gasket, and two pipe fittings. The gasket is placed between the connecting surfaces of the two pipe fittings, and the clamping force of the clamps compresses the gasket, thereby forming a tight, leak-free sealed connection.

- **Material Types**:

    - **EPDM (Ethylene Propylene Diene Monomer)**: It has an operating temperature range of -20°F to 300°F (approximately -29°C to 149°C). It offers excellent high-temperature resistance and good tolerance to animal and vegetable oils, ozone, steam, water, and oxygenated solvents. It is suitable for applications involving CIP (Clean-in-Place) disinfectants like Oxonia and ozonated water.

    - **FKM/Viton (Fluorocarbon Rubber)**: Its operating temperature range is -30°F to 400°F (approximately -34°C to 204°C). It has higher chemical resistance than most elastomers and excellent compatibility with strong acids. However, it is not recommended for continuous use in SIP (Sterilize-in-Place) procedures.

    - **PTFE/Teflon (Polytetrafluoroethylene)**: With an operating temperature range of -100°F to 500°F (approximately -73°C to 260°C), it boasts extremely strong chemical resistance. Nevertheless, it is not advisable for use in scenarios with frequent large temperature fluctuations, as it lacks memory and may experience a "cold flow" phenomenon.

    - **Silicone Rubber**: Its operating temperature range is -40°F to 450°F (approximately -40°C to 232°C). It exhibits chemical resistance to various common chemicals, including acids, alkalis, and steam, but has only average tolerance to oils.

- **Application Fields**: Tri-Clamp Gaskets are widely used in industries with extremely high sanitary requirements, such as the food, dairy, beverage, biotechnology, and pharmaceutical industries. They are used to seal clamp connections in sanitary piping systems, ensuring that the connections between pipes, valves, pumps, and other process equipment are sanitary, preventing product contamination, and guaranteeing product quality and safety.

- **Performance Advantages**:

    - **Good Sanitary Performance**: It has a smooth, non-porous surface without layered grooves or protrusions, which makes it difficult for bacteria to grow and dirt to accumulate. It complies with relevant sanitary standards and certifications such as FDA and USP Class VI.

    - **Reliable Sealing Performance**: Under the clamping force of the clamps, it can form an excellent sealing effect, effectively preventing the leakage of liquids or gases and ensuring the normal operation of the system.

    - **Easy Installation**: No special tools are required; installation and disassembly can be quickly completed using clamps, facilitating the maintenance and cleaning of equipment.