Bellows Seal

The Mark 74 provides long-term, leak-free performance when fugitive emissions are a primary concern. The Mark 74 offers exceptional bellows life with a valve stroke that is just a fraction of that of other rising stem valves. This means Jordan Valve can use a smaller formed bellows that has minimal movement during operation. The Mark 74 controls fugitive emissions while reducing the risks associated with toxic, corrosive, explosive and high temperature fluids.

Features & Benefits
  • Long bellows life – in lab tests, the Mark 74 exceeded 2 million cycles with no bellows failure
  • Short stroke – valve stroke is just a fraction of other rising stem valves allowing for minimal movement during operation
  • Fully packed back-up seal for additional assurance. A secondary chamber of multiple packing rings provides extra leakage protection
  • Detection/monitoring port – a gauge can be mounted to verify bellows performance
Approvals

CRN Number
Mark 74″ 1/2″ – 2″

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