Bell & Gossett Potable Water Diaphragm Expansion Tanks – ASME (PTA)

Overview Technical Drawings Documentation & Tools Submittals


Series PTA expansion tanks are ASME rated, pre-charged diaphragm-type vessels designed to absorb the forces of expanding water and protect a potable water system from pressure build up.

Product Features
  • Residential and commercial applications
  • Integrated bladder integrity monitor included on all models
  • Controls system pressure
  • Protects plumbing fixtures
  • Eliminates relief valve blow-off
  • FDA approved materials
  • ASME construction
  • High maximum operating temperatures
  • High working pressures of 175 PSI and 250 PSI available

The FDA approved heavy duty butyl diaphragm and polypropylene liner (sizes PTA-5 through PTA-210V) or replaceable FDA approved full acceptance butyl bladder (sizes PTA-447 through PTA-457) completely isolates the water from the steel shell. All units include an integrated bladder integrity monitor.


Technical Drawings


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Documentation & Tools

Documentation & Tools

Interactive Tools