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This post was last edited by Xin Ruifangxiao on 2025-6-13 08:49. Industry: Chemicals; Customer: Hazardous chemicals manufacturer; Application location: Cooking and washing tanks; Temperature: 150°C; Medium: Dilute nitric acid, dilute sulfuric acid; Pressure: 0.4 MPa. Problem encountered: The cooking and washing process is crucial for the customer’s production, and they have been looking for gaskets suitable for use in these tanks. Before contacting us, the customer had used rubber rings and rigid PTFE gaskets, but due to the lateral movement that occurs when the lid opens and closes, the seals would become distorted or even break apart, allowing contaminants to enter the reactor and contaminate the products inside it. Furthermore, the PTFE gasket began to creep after just 4 openings, and its sealing performance deteriorated rapidly. Equipment detail drawing solution: After evaluating the equipment and the overall application, our technical team recommends using the SF700 series. It is a multidirectionally stretched ePTFE sealing tape. Compared to ordinary PTFE gaskets, it boasts superior tensile strength and dimensional stability; it is less prone to twisting deformation when subjected to the lateral shear forces generated by opening and closing the lid of a cooking tub, and it maintains an excellent seal even after repeated openings and closings. Customer benefit: Compared to the washer materials used before, SF700 can clearly operate for a longer time. With previous gasket materials, problems such as debris falling off the gasket and seal failure would occur within less than 15 days of operation. The SF700 material provides excellent sealing performance in this application, with no leaks over a 30-day period until the next maintenance. As a result, customers can enjoy more continuous production time, while eliminating product losses caused by gasket debris. Introduction to Fle*ngSeal® industrial sealing tape: Fle*ngSeal® sealing materials are porous expanded tape products manufactured using a special process, available in three series: SF100, SF200, and SF700. This material is soft, compressible, and easy to shape; it can form a good seal at the tiny cracks and defects in the sealing interface under low pressure, thereby effectively protecting brittle structural materials and ensuring a secure seal. For non-metallic components such as glass, ceramics, graphite, and plastics, Fle*ngSeal® sealing materials can also achieve good sealing results. It can better compensate for errors caused by machining defects, rigid deformation, misalignment during installation, etc., balance uneven pre-tensioning forces, and effectively address leakage issues of various gases and liquids under complex conditions. Chengdu Xinrui Fangxiao Technology Co., Ltd. is seeking partners in industries such as petroleum, chemicals, papermaking, and shipbuilding. Previous Recommendations: 1. Case Study || Application of Fle*ngSeal SF100 in expansion joints 2. Case Study || When Fle*ngSeal industrial sealing materials are used in heat exchangers and evaporators 3. Case Study || Application of Fle*ngSeal® SF100 in mechanical transmission hatches 4. Case Study || When Fle*ngSeal industrial sealing materials are used in acid and alkali pumps as well as blowers in desulfurization towers