Circle Valve Technologies Inc.
1533 Gehman Road
Harleysville, PA 19438

Toll Free:800-645-6733
Phone: 267-933-6300
Fax: 267-933-6305
Email: [email protected]
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FO Series Face Seal Fittings

Features
  • O-ring seal to provide perfect leak-tight service for working conditions from critical vacuum to high pressure
  • O-ring contained completely for maximum efficiency
  • Smooth finish on gland face to ensure psitive seal
  • Test ports at nut for easy leak testing
  • Easy installation and maintenance
  • Silver-plated female threads
  • Standard surface roughness finished to an average of Ra 10 uin. (0.25 um)
  • Every gland and body marked with size, material and heat code
FO Series Fittings
Unit of Measure
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Item #

Body Type

Body Material

Connection Size 1

Connection Type 1

Connectiont Size 2

Connection Type 2

Operating Pressure

SS-U-FO12-FL12 N/A Face Seal O-Ring Body N/A 316 Stainless Steel N/A 3/4 in N/A O-Ring Face Seal N/A 3/4 in N/A Tube Fitting N/A 0 to 5800 psig0 to 399 bar
SS-U-FO16-FL16 N/A Face Seal O-Ring Body N/A 316 Stainless Steel N/A 1 in N/A O-Ring Face Seal N/A 1 in N/A Tube Fitting N/A 0 to 4700 psig0 to 323 bar
SS-UB-FO4-FL4 N/A Face Seal O-Ring Body N/A 316 Stainless Steel N/A 1/4 in N/A O-Ring Face Seal N/A 1/4 in N/A Bulkhead Tube Fitting N/A 0 to 10200 psig0 to 702 bar
SS-UB-FO4-FL4 N/A Face Seal O-Ring Body N/A 316 Stainless Steel N/A 1/2 in N/A O-Ring Face Seal N/A 3/8 in N/A Bulkhead Tube Fitting N/A 0 to 6500 psig0 to 447 bar
SS-UB-FO8-FL8 N/A Face Seal O-Ring Body N/A 316 Stainless Steel N/A 1/2 in N/A O-Ring Face Seal N/A 1/2 in N/A Bulkhead Tube Fitting N/A 0 to 6700 psig0 to 461 bar
SS-UB-FO12-FL12 N/A Face Seal O-Ring Body N/A 316 Stainless Steel N/A 3/4 in N/A O-Ring Face Seal N/A 3/4 in N/A Bulkhead Tube Fitting N/A 0 to 5800 psig0 to 399 bar
SS-UB-FO16-FL16 N/A Face Seal O-Ring Body N/A 316 Stainless Steel N/A 1 in N/A O-Ring Face Seal N/A 1 in N/A Bulkhead Tube Fitting N/A 0 to 4700 psig0 to 323 bar
SS-BY-FO4 N/A Face Seal O-Ring Body N/A 316 Stainless Steel N/A 1/4 in N/A O-Ring Face Seal N/A N/A Blind Body N/A
SS-BY-FO8 N/A Face Seal O-Ring Body N/A 316 Stainless Steel N/A 1/2 in N/A O-Ring Face Seal N/A N/A Blind Body N/A
SS-BY-FO12 N/A Face Seal O-Ring Body N/A 316 Stainless Steel N/A 3/4 in N/A O-Ring Face Seal N/A N/A Blind Body N/A
SS-BY-FO16 N/A Face Seal O-Ring Body N/A 316 Stainless Steel N/A 1 in N/A O-Ring Face Seal N/A N/A Blind Body N/A
SS-U-FO4 N/A Face Seal O-Ring Body N/A 316 Stainless Steel N/A 1/4 in N/A O-Ring Face Seal N/A 1/4 in N/A Union Body N/A 0 to 14300 psig0 to 985 bar
SS-U-FO8-FO4 N/A Face Seal O-Ring Body N/A 316 Stainless Steel N/A 1/2 in N/A O-Ring Face Seal N/A 1/4 in N/A Union Body N/A 0 to 11100 psig0 to 764 bar
SS-U-FO8 N/A Face Seal O-Ring Body N/A 316 Stainless Steel N/A 1/2 in N/A O-Ring Face Seal N/A 1/2 in N/A Union Body N/A 0 to 11100 psig0 to 764 bar
SS-BU-FO4 N/A Face Seal O-Ring Body N/A 316 Stainless Steel N/A 1/4 in N/A O-Ring Face Seal N/A N/A Bulkhead Union Body N/A 0 to 14300 psig0 to 985 bar
SS-BU-FO8 N/A Face Seal O-Ring Body N/A 316 Stainless Steel N/A 1/2 in N/A O-Ring Face Seal N/A N/A Bulkhead Union Body N/A 0 to 11100 psig0 to 764 bar
SS-CW-FO4-TS2 N/A Face Seal O-Ring Body N/A 316 Stainless Steel N/A 1/8 in N/A O-Ring Face Seal N/A 1/8 in N/A Tube Socket Weld N/A 0 to 12600 psig0 to 868 bar
SS-CW-FO4-TS4 N/A Face Seal O-Ring Body N/A 316 Stainless Steel N/A 1/4 in N/A O-Ring Face Seal N/A 1/4 in N/A Tube Socket Weld N/A 0 to 6800 psig0 to 468 bar
SS-CW-FO8-TS6 N/A Face Seal O-Ring Body N/A 316 Stainless Steel N/A 3/8 in N/A O-Ring Face Seal N/A 3/8 in N/A Tube Socket Weld N/A 0 to 8100 psig0 to 558 bar
SS-CW-FO8-TS8 N/A Face Seal O-Ring Body N/A 316 Stainless Steel N/A 1/2 in N/A O-Ring Face Seal N/A 1/2 in N/A Tube Socket Weld N/A 0 to 3000 psig0 to 206 bar
SS-CW-FO12-TS12 N/A Face Seal O-Ring Body N/A 316 Stainless Steel N/A 3/4 in N/A O-Ring Face Seal N/A 3/4 in N/A Tube Socket Weld N/A 0 to 3700 psig0 to 254 bar
SS-CW-FO16-TS16 N/A Face Seal O-Ring Body N/A 316 Stainless Steel N/A 1 in N/A O-Ring Face Seal N/A 1 in N/A Tube Socket Weld N/A 0 to 3000 psig0 to 206 bar
SS-CW-FO4-TB4A N/A Face Seal O-Ring Body N/A 316 Stainless Steel N/A 1/4 in N/A O-Ring Face Seal N/A 1/4 in N/A Automatic Tube Weld N/A 0 to 5100 psig0 to 351 bar
SS-CW-FO8-TB6A N/A Face Seal O-Ring Body N/A 316 Stainless Steel N/A 1/2 in N/A O-Ring Face Seal N/A 3/8 in N/A Automatic Tube Weld N/A 0 to 3300 psig0 to 227 bar
SS-CW-FO8-TB8A N/A Face Seal O-Ring Body N/A 316 Stainless Steel N/A 1/2 in N/A O-Ring Face Seal N/A 1/2 in N/A Automatic Tube Weld N/A 0 to 3500 psig0 to 241 bar
Unit of Measure
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