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Fisher™ G200/G201 Series Back Check Valves
G200/G201 Series back check valves are specifically intended for heavy-duty in-line service at the bulk plant?s transfer area.
The valves are suitable for LP-Gas or Anhydrous Ammonia (NH3) service. Flow moves the spring loaded poppet to the open position as soon as pressure differential is created. A soft seat construction gives tight shutoff so that piping can be blown down for maintenance. Type G201 has a built-in flow indicator mechanism, which can be used to replace sight flow indicators.
Fisher™ G200/G201 Series Back Check Valves


Body Sizes and End Connection Styles (inlet x outlet)
Types G200-10/G201-10: 1-1/4-inch FNPT
G200-16/G201-16: 2-inch FNPT
G200-24/G201-24: 3-inch FNPT
Maximum Inlet Pressure
400 psi / 27,6 bar
Temperature Capabilities
-40° to 160°F / -40° to 71°C


  • Rugged Construction
  • High-Flow Capacity
  • Soft Seat
  • Flow Indicator