Inner and Outer Reinforced Type Style CGI (Type D) The inner and outer reinforced spiral wound gasket is an outer reinforced gasket with an inner ring installed inside. This inner ring provides additional reinforcement to the gasket to prevent it from being crushed and deformed under pressure. It is suitable for high-temperature and high-pressure conditions, and can be used for pressure classes above Class 900, or in corrosive media and severe operating conditions.It is applicable to flat face flanges and raised face flanges
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