Hangzhou Bright Rubber Plastic Product Co., Ltd. is one of the leading manufacturers and suppliers of pneumatic inflatable seal ring in China. If you're going to buy pneumatic inflatable seal ring made in China, welcome to get more information from our factory. We also accept customized orders.
Working Principle
The inflatable seal operates on a simple but effective principle: when deflated, the rubber ring contracts, creating a small gap between the seal and the mating surface. This allows the flange or component to be easily slid into position without friction or resistance. Once positioned, compressed air is introduced into the internal cavity, causing the seal to expand outward and press firmly against the pipe or housing. This expansion creates a continuous, uniform contact pressure that forms a watertight and airtight barrier, even on uneven or slightly misaligned surfaces.
Material & Temperature Resistance
This seal is available in EPDM, silicone, and other specialty rubber compounds. EPDM offers excellent resistance to hot water, steam, aging, and ozone, making it ideal for temperatures up to 150°C. Silicone provides even higher temperature resistance (up to 200°C) and excellent flexibility in cold environments. Both materials are resistant to a wide range of chemicals and can be formulated to meet specific hardness and elasticity requirements. The material choice depends on the operating temperature, medium, and required service life.
Sealing Performance & Compensation
The inflatable design provides superior sealing performance compared to traditional compression seals. Because the seal expands uniformly, it can accommodate significant surface irregularities, ovality, and dimensional tolerances. It can compensate for radial clearance of approximately 5mm or more, depending on the seal profile and inflation pressure. This makes it ideal for large-diameter pipes where perfect roundness cannot be guaranteed. The seal maintains constant pressure even under vibration or thermal cycling, ensuring long-term reliability.
Application Scope
This versatile inflatable seal is widely used in numerous industries. In water treatment and pipeline systems, it provides reliable sealing for large-diameter pipe connections and manhole covers. In industrial equipment, it is used for vacuum chambers, pressure vessels, and test rigs. It is also found in aerospace, semiconductor manufacturing, and medical equipment where clean, reliable sealing is essential. Available in custom sizes and configurations, it can be tailored to meet specific project requirements.
Installation & Maintenance
Installation is straightforward and does not require special tools. The deflated seal is placed into its groove or mounting position, and the mating component is slid into place. Compressed air is then applied through the integrated valve or port to inflate the seal. The seal can be deflated and re-inflated repeatedly without loss of performance. Maintenance is minimal, and the seal can be easily replaced if needed. We also provide technical support for inflation pressure, groove design, and installation procedures to ensure optimal performance.
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