Circle Valve Technologies Inc.
307 Derstine Ave, Suite 204
Lansdale, PA 19446

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-N-FO12-B N/A Face Seal O-Ring Blind Nut N/A 316 Stainless Steel N/A 3/4 in N/A O-Ring Face Seal N/A N/A Blind Nut N/A
SS-N-FO16-B N/A Face Seal O-Ring Blind Nut N/A 316 Stainless Steel N/A 1 in N/A O-Ring Face Seal N/A N/A Blind Nut N/A
SS-CM-FO4-NS2 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 1/8 in N/A Male NPT N/A 0 to 10000 psig0 to 689 bar
SS-CM-FO4-NS4 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 Male NPT N/A 0 to 13400 psig0 to 923 bar
SS-CM-FO8-NS6 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 Male NPT N/A 0 to 7800 psig0 to 537 bar
SS-CM-FO8-NS8 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 Male NPT N/A 0 to 10000 psig0 to 689 bar
SS-CM-FO12-NS12 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 Male NPT N/A 0 to 7300 psig0 to 502 bar
SS-CM-FO16-NS16 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 Male NPT N/A 0 to 5300 psig0 to 365 bar
SS-CM-FO4-ST7 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 7/16-20 in N/A SAE/MS Thread N/A 0 to 4500 psig0 to 310 bar
SS-CM-FO4-ST9 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 9/16-18 in N/A SAE/MS Thread N/A 0 to 4500 psig0 to 310 bar
SS-CM-FO8-ST7 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 7/16-20 in N/A SAE/MS Thread N/A 0 to 4500 psig0 to 310 bar
SS-CM-FO8-ST9 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 9/16-18 in N/A SAE/MS Thread N/A 0 to 4500 psig0 to 310 bar
SS-CM-FO8-ST12 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 3/4-16 in N/A SAE/MS Thread N/A 0 to 4500 psig0 to 310 bar
SS-CM-FO12-ST17 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 1 1/16-12 in N/A SAE/MS Thread N/A 0 to 3600 psig0 to 248 bar
SS-CM-FO16-ST21 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 5/16-12 in N/A SAE/MS Thread N/A 0 to 2900 psig0 to 199 bar
SS-CF-FO4-NS2 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 1/8 in N/A Female NPT N/A 0 to 8400 psig0 to 578 bar
SS-CF-FO4-NS4 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 Female NPT N/A 0 to 6600 psig0 to 454 bar
SS-CF-FO8-NS6 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 Female NPT N/A 0 to 6600 psig0 to 454 bar
SS-CF-FO8-NS8 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 Female NPT N/A 0 to 4900 psig0 to 337 bar
SS-CF-FO12-NS12 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 Female NPT N/A 0 to 4600 psig0 to 316 bar
SS-CF-FO16-NS16 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 Female NPT N/A 0 to 4400 psig0 to 303 bar
SS-U-FO4-FL2 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 1/8 in N/A Tube Fitting N/A 0 to 10900 psig0 to 751 bar
SS-U-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 Tube Fitting N/A 0 to 10200 psig0 to 702 bar
SS-U-FO8-FL6 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 Tube Fitting N/A 0 to 6500 psig0 to 447 bar
SS-U-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 Tube Fitting N/A 0 to 6700 psig0 to 461 bar
Unit of Measure
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