The ZSU2 is designed to provide a zone isolation, maintenance and physical break point. Non-interchangeable screw thread (NIST) connections complying with BS EN 739 are fitted at either side of the 22mm quarter-turn ball valve to provide connection points for emergency supplies, purging or gas sampling. The lockable hinged cover is fitted with a removable pull-out oval window to facilitate safe emergency access. 28mm nominal bore valve assemblies are available for vacuum service. Key features include:
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