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Product description

The FB5C Series is available with a hard seat and a variety of diaphragm and o-ring materials, making the valve well-suited for virtually any sterile back pressure application.

The FB5C operates by sensing the inlet pressure, or back pressure, beneath the diaphragm, as flow enters from inlet port on the side. As the back pressure exceeds the setpoint, the diaphragm force compresses the range spring permitting the stem to move from the seat toward the open position. As the flow increases, the back pressure is relieved and the spring and diaphragm relax, allowing the stem to return to the normally closed position. If a different set point is desired, a simple turn of the adjusting screw will increase or decrease the setting to any set point within the range covered by the regulator’s spring.



Back Pressure Reducing Valve FB5C

Size
  • 3/4", 1", 1-1/2" 2", 3" (DN20-DN85)
End Connections
  • Sanitary Clamp
Trim Materials
  • 316L Stainless Steel (ASTM A479, S31603)
Body Materials
  • ASTM A351, CF3M 316L
Seat Materials
  • Standard hard seat – integral 316L SST seat
  • Soft seats are available, consult the factory for more information.
Spring Housing Materials
  • CF8M cast SST (3/4" – 3")
Diaphragm Materials
  • EPDM/Nylon (to 275°F, 135°C), FDA
  • EPDM (to 120°F, 49°C), 3A spec
  • Jorlon (to 400°F, 204°C), 3A & FDA
O-Ring Materials
  • EPDM (to 275°F, 135°C) - 3A & FDA
  • Teflon-Encapsulated Viton (to 400°F, 204°C) - 3A & FDA

Body Pressure Temperature Rating
  • EPDM/Jorlon (dependent upon construction)
Shutoff
  • ANSI Class III hard seat
Features and Benefits
  • No guiding surfaces in the fluid – prevents particulate generation
  • 100% 316L body and trim
  • Self-draining
  • No threads to disassemble for cleaning
  • Clean-in-Place, Steam-in-Place – dome features spring arrangement to allow CIP/SIP