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P Series 9 Series 78 Series A7000 Series Changeover Valve History

 

Materials

Drawing Model Number

 

 Starvalve Changeover Valve
The Atwood & Morrill Starvalve is designed to offer a quick and easy way to change from for active to standby valve or rupture disk for ease of maintenance.  The pressure drop through the Starvalve  is less than 3%, and meets API RP520 Part II and ASME Section VIII Code requirements.  The Changeover Valve can also be used on the outlet allowing for simplified discharge piping.
Features and Benefits:
  • Less than 3% pressure drop
  • Code compliant
  • No process interruption 
  • Available linkage to switch inlet and outlet valves simultaneously
  • Valve settings: Device A, Device B, Device A and B
  • Indication of active valve
  • Tamper-proof locking mechanism
  • Eliminates high cost of unscheduled shutdowns
  • High Cv to maximize overpressure protection