An RJT liner is a crucial internal component of an RJT (Ring Joint Type) union, designed to create a smooth, hygienic internal surface and a reliable seal within the pipe connection. It forms part of the sealing face when assembled with the male part, nut, and O-ring seal.
Key Information
Function: The primary function of the liner is to ensure proper alignment with the male part and provide a smooth, crevice-free flow path to prevent the buildup of product residue, contaminants, or bacteria, which is essential for sanitary conditions. It also acts as a protective barrier for the internal O-ring seal, shielding it from direct contact with the flow medium and reducing wear.
Material: RJT liners are typically made from high-grade 316 or 316L stainless steel for excellent corrosion resistance, especially in demanding hygienic applications. This is in contrast to the accompanying hex nut, which is often made from 304 stainless steel.
Standards: They are manufactured to comply with the British Standard BS 4825 Part 5 for hygienic applications.
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