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There are many of sealing forms of BSPP thread between BSPP male stud connector and thread ports(ISO 1179-1). Today this blog will talk about the metal to metal sealing of BSPP thread sealing edge forms.
DIN 3852-02 Type B and ISO 1179-4
DIN 3852-02 type B is a ISO 228-1 BSPP thread under DIN standard,which is also called ISO 1179-4 under ISO standard. So they are the same thing, just the name is differernt under ISO and DIN standards.
Metal to Metal Sealing
Metal to Metal Sealing, also known as Cutting Face or Type B. This design creates a seal by means of a sharp “cutting face” at the base of the male thread that cuts into the flats or “spotface” surrounding the port when the fitting is threaded and tightened.
Cutting Face Type B is available in BSPP (ISO 1179-4) and Metric (ISO 9974- 3), although it is commonly mis-identified as regular BSPP or Metric port fitting with the seal missing. Look for a raised outer section on the male fitting where the bonded washer or seal would go; if it exists this indicates the fitting is Cutting Face.
Hydraxio is supplying metal to metal seal hydraulic fittings and adapters, please feel free to contact us if any demands.