PVDF Diaphragm valve DIASTAR Ten FC

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The Georg Fischer SYGEF Plus Diaphragm Valve DIASTAR Ten FC provides automated flow control and dependable shut-off for ultrapure water (UPW), Water for Injection (WFI), and aggressive chemical distribution systems in semiconductor, biotechnology, and pharmaceutical industries. Actuated pneumatically with a Fail Safe to Close (FC) spring-return mechanism, the valve incorporates a rotating air connection adjustable at 90-degree intervals for flexible orientation during installation. Manufactured from virgin, unpigmented high-purity polyvinylidene fluoride (PVDF-HP), each unit is produced, cleaned with 18 MOhm pure water, and double-bagged under cleanroom ISO Class 5 (Class 100) conditions in compliance with SEMI F57, FDA CFR 21 177.2510, and USP Class VI requirements. The hydrodynamically optimized body geometry delivers double the flow capacity compared to predecessor series, significantly decreasing pressure loss across the d20 to d63 mm (DN15 to DN50) size range. A single central housing nut replaces traditional four-bolt bonnet arrangements, applying uniform radial compression across the PTFE/EPDM or PTFE/FKM diaphragm and white FKM O-ring seals while dramatically reducing maintenance downtime. Extended metric spigots facilitate butt fusion jointing using bead and crevice free (BCF Plus) or infrared (IR Plus) welding machines, preventing stagnant zones and ensuring high-integrity integration into critical process networks.