Is the ORFS straight fitting with UNF GZ in carbon steel, type G compatible with standard O-rings for pressure up to 350 bar?

Yes . the ORFS straight fitting with UNF GZ in carbon steel, type G Format is compatible with standard O-rings for pressures up to 350 bar, provided the correct O-ring material and size are used and installation is proper. Key points: - Seal type: The fitting uses an ORFS (O-ring Face Seal) design where the O-ring sits in a groove on the flat face . this is specifically intended for elastomer O-ring sealing. - Pressure rating: ORFS connections are commonly used up to and beyond 350 bar when correctly specified; carbon steel, galvanized hardware of type G Format is mechanically suitable for that pressure range. - O-ring selection: Use an O-ring material compatible with the fluid, temperature, and pressure (e.g., NBR for mineral oils up to ~100Â°C, HNBR for higher temps and pressures, FKM/Viton for higher chemical resistance). Ensure the O-ring cross-section/size matches the groove dimensions for the fitting. - Installation: Proper torque of the UNF external thread, clean sealing surfaces, and an undamaged O-ring are required to achieve the rated pressure. If you need a definitive assurance for a specific system, provide fluid type, temperature range, and exact O-ring/groove dimensions so a precise material and part verification can be made.

Can ORFS straight fitting with UNF GZ in carbon steel, type G use a different O-ring material for higher temperature resistance?

Yes. ORFS straight fitting with UNF GZ in carbon steel, type G can use a different O-ring material for higher temperature resistance, provided the alternative elastomer fits the groove and maintains required sealing properties and compatibility with the fluid and plating. Common higher-temperature options: Viton (FKM) - good to ~200â250Â°C depending on compound; PTFE-filled or PTFE-coated O-rings - excellent high-temp and chemical resistance but require careful gland design to prevent extrusion; perfluoroelastomers (FFKM) - highest heat/chemical resistance up to ~260â300Â°C, costlier. Verify hardness (durometer), extrusion gap limits for the flat-face ORFS groove, and chemical compatibility with system media and the carbon steel galvanized surface. Always confirm selection with supplier/manufacturer and perform validation/testing under actual operating pressure and temperature.

What O-ring hardness is recommended for ORFS straight fitting with UNF GZ in carbon steel, type G under dynamic cycling?

For ORFS straight fitting with UNF GZ in carbon steel, type G Format used under dynamic cycling (vibration/flexing), a medium-hard O-ring is recommended to balance sealing performance and wear resistance. Specifically: - Hardness: 70â90 Shore A (preferably around 80 Shore A). - Material: NBR (nitrile) for general hydraulic oil service; consider HNBR for higher temperature/ozone and improved dynamic wear; FKM (Viton) if aggressive fluids or high temperatures require it. - Rationale: 80 Shore A offers good extrusion and wear resistance in the flat-face groove of ORFS fittings under cyclic loads while maintaining sufficient elasticity to conform and seal against UNF GZ mating faces. Harder compounds (above ~90 Shore A) risk poor conformability and sealing; softer compounds (below ~70 Shore A) wear and extrude faster under dynamic loading. - Additional notes: Verify groove dimensions and clearances per manufacturer standards and consider backup rings or reduced clearance designs if pressure/extrusion risk is high. Ensure compatibility of O-ring material with operating fluid and temperature range.

ORFS straight fitting with UNF GZ in carbon steel, type G

Additional information

Material	CS – steel (cast iron)

Straight ORFS fitting with external UNF thread (O-ring seal in the groove of the flat face), type G. Material: carbon steel, galvanized.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
HO-G-09	GZ ORFS fitting 9/16"-18 / 9/16"-18	-	630	In stock	Enquiry
HO-G-11	GZ ORFS fitting 11/16"-16 / 11/16"-16	-	630	In stock	Enquiry
HO-G-13	GZ ORFS fitting 13/16"-16 / 13/16"-16	-	630	In stock	Enquiry
HO-G-16	GZ ORFS fitting 1"-14 / 1"-14	-	420	In stock	Enquiry
HO-G-19	GZ ORFS fitting 1.3/16"-12 / 1.3/16"-12	-	420	In stock	Enquiry
HO-G-23	GZ ORFS fitting 1.7/16"-12 / 1.7/16"-12	-	420	In stock	Enquiry
HO-G-27	GZ ORFS fitting 1.11/16"-12 / 1.11/16"-12	-	280	In stock	Enquiry
HO-G-32	GZ ORFS fitting 2"-12 / 2"-12	-	280	In stock	Enquiry