3A and FDA approved, Self-draining, CIP/SIP, no guiding surfaces in the fluid

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.

Features & 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

Size Range: 3/4″ – 3″ (DN20 – DN80)
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 available consult factory
Spring Housing Materials: CF8M cast SST
Diaphragm Materials:

  • EPDM/Nylon to 275°F (135°C) 3A & FDA
  • Teflon Encapsulated Viton to 400°F (204°C) 3A & FDA
  • Jorlon (to 400°F, 204°C), 3A & FDA

Jorlon Diaphragm Warranty

Steriflow Food & Beverage warrants the Jorlon diaphragm for use on all of our 3A Food and Beverage pressure regulators and back pressure regulators.


3A Approval
PED Pressure Equipment
SEP Declaration (Sound Engineering Practice)
CRN Registration Number
All products use FDA and USP Class VI approved soft goods and seals where possible

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