Is the ORFS plug with GW UNF in carbon steel, type VKA compatible with hydraulic systems using ORFS female ports and rated for standard operating pressures?

Yes . the ORFS plug with GW UNF in carbon steel, type VKA is intended to be used with ORFS female ports. It seals on the front surface (face seal) via the ORFS geometry, so when fitted into a matching ORFS female port it provides a proper hydraulic seal. Being made of carbon steel and galvanized, it is suitable for typical hydraulic system applications where carbon steel fittings are used. However, compatibility with âstandard operating pressuresâ depends on the specific pressure rating of the mating port, the plugâs size, and the system conditions (temperature, fluid type, dynamic loads). The ORFS face-seal design is commonly rated for high-pressure hydraulic use when both plug and female port meet the same dimensional and material standards. To ensure safe operation, verify: - Plug and female port conform to the same ORFS dimensions and UNF thread sizes, - Manufacturerâs pressure rating for the specific plug size and material, - System temperature and fluid are compatible with carbon steel and galvanization, - Proper torque and installation procedures are followed. If these checks are met, the ORFS plug with GW UNF in carbon steel, type VKA can be considered compatible and suitable for standard hydraulic operating pressures.

Does the ORFS plug with GW UNF in carbon steel, type VKA require thread sealant for leak-free front-surface sealing?

ORFS plug with GW UNF in carbon steel, type VKA (sealing on the front surface) does not require thread sealant for the front-surface (face) seal. The primary leak path is sealed by the flat front face seating against the mating ORFS female port; the UNF internal thread only provides mechanical retention. Do ensure the mating face and plug face are clean, undamaged and properly torqued to the specified value. Thread sealant on the UNF threads is not necessary and can interfere with proper seating; if used, choose a non-hardening, compatible compound and apply sparingly only if additional protection against external thread corrosion is desired.

Can the ORFS plug with GW UNF in carbon steel, type VKA be used with hydraulic fluids like phosphate esters or water glycol?

No. The ORFS plug with GW UNF in carbon steel, type VKA Format is made of galvanized carbon steel and seals on the front surface. Phosphate esters and water-glycol hydraulic fluids are chemically aggressive and/or hygroscopic and can cause rapid corrosion, hydrogen embrittlement, loss of plating integrity and seal failure in carbon steel components. Additionally, these fluids often require specific elastomers and materials (stainless steel or corrosion-resistant alloys, compatible coatings and suitable seals) to ensure long-term compatibility and safety. Therefore do not use the ORFS plug with GW UNF in carbon steel, type VKA Format with phosphate ester or water-glycol fluids. Use components specified by the fluid manufacturer that list compatibility with those fluids, typically stainless steel or specially treated materials and approved sealing materials.

ORFS plug with GW UNF in carbon steel, type VKA

Additional information

Material	CS – steel (cast iron)

ORFS blind plug (cap) with internal UNF thread (sealing on the front surface), type VKA. Material: carbon steel, galvanized.

List of product variants

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