DN150 Molded Single-Arch PTFE-Lined EPDM Rubber Expansion Joint with Chemically Inert PPH PN6 Flanges (150mm)

Product Overview

This heavy-duty DN150 (6-inch) molded rubber expansion joint is structurally configured for electrolyte circulation networks, chemical dosing lines, and primary pump intakes within utility-scale vanadium or iron-chromium flow battery storage facilities. Operating under a steady 1 bar working pressure profile, this single-arch expansion bellow incorporates an integrated high-density polytetrafluoroethylene (PTFE) interior liner, achieving universal chemical immunity against highly concentrated, strongly oxidizing acid mixtures. Operating within stable ambient temperature ranges, this compact 150mm face-to-face rubber flexible joint serves as the definitive structural dampener to protect fragile thermoplastic or glass-lined piping headers from operational stress fractures.

The elastomer framework of the rubber bellow is precision-molded to guarantee absolute uniform wall thickness and optimal compound cross-linking density. The seamless internal PTFE barrier extends continuously over the sealing lip, forming an impenetrable armor that prevents aggressive chemical permeation or polymer swelling within the structural EPDM matrix. To eliminate the risk of metallic ion contamination, which degrades proton exchange membranes and compromises battery coulombic efficiency, the unit implements a 100% non-metallic configuration. The chemically inert PTFE-faced sealing rim mates with corrosion-proof Polypropylene Homopolymer (PPH) swivel flanges. These backing rings are precision-machined to GB PN10/PN6 specifications, providing full immunity to acidic vapors and electrolyte splashback.

Driven by premium B2B quality control standards, our manufacturing pipelines maintain extensive inventories of specialized PTFE-lined EPDM compounds and high-density PPH flanges. Beyond standard metric geometries, our engineering division supports full custom-to-drawing fabrication, modifying specific offset limits and non-standard bolt circles based directly on your submitted CAD prints to eliminate renewable energy project integration delays.