Does the STECKO socket elbow made of automatic steel require special maintenance after galvanization to preserve NBR O-ring and Teflon back-up ring seals?

No. The STECKO socket elbow made of automatic steel and galvanized does not require special maintenance after galvanization specifically to preserve the NBR O-ring and Teflon backâup ring seals, provided normal good-practice measures are followed. Galvanizing protects the steel substrate from corrosion but can leave surface residues (zinc spatter, salts) or slight roughness; these should be removed or rinsed before assembly. Ensure the following simple steps: - Inspect and clean mating surfaces after galvanizing to remove loose zinc particles or contaminants (wipe or rinse with clean, dry cloth or mild solvent compatible with NBR and Teflon). - Avoid aggressive solvents or cleaners that can swell/degrade NBR (e.g., strong ketones or aromatic hydrocarbons). Use water, isopropyl alcohol, or manufacturerârecommended cleaners. - Verify no sharp burrs or rough edges remain that could cut the O-ring; light deburring if necessary. - Lubricate the NBR O-ring with a compatible grease (mineralâoil based or specified by seal maker) to ease assembly and reduce wear; Teflon backup ring typically needs no lubrication but is compatible with the same lubricants. - Reuse of seals: inspect O-ring and backup ring for damage; replace if degraded. Following these precautions preserves NBR and Teflon seals; no additional special postâgalvanization treatment is required.

Can the STECKO socket elbow, automatic steel, be used with hydraulic fluids that may degrade NBR O-rings or Teflon back-up rings?

If the hydraulic fluids you plan to use are known to degrade NBR (nitrile) O-rings or Teflon back-up rings, the STECKO socket elbow, automatic steel (galvanized) is not suitable without changing sealing materials. The socket-plug elbow is supplied with NBR O-rings and PTFE (Teflon) back-up rings; exposure to incompatible fluids will cause swelling, softening or chemical attack of NBR and potential damage to PTFE, leading to leaks and seal failure. To use this fitting with aggressive fluids, specify compatible seals (e.g., FKM/Viton, EPDM, or compatible PTFE alternatives) and confirm chemical compatibility with the fluid and operating temperature/pressure. Always consult STECKO technical data and perform compatibility testing before service.

Is the STECKO socket elbow, automatic steel, compatible with high-temperature hydraulic applications regarding NBR and Teflon seals?

The STECKO socket elbow, automatic steel is described with NBR (O-ring) and Teflon (back-up ring) seals. Compatibility with high-temperature hydraulic applications depends on the temperature limits of those sealing materials: - NBR (nitrile rubber) typically tolerates approx. -40Â°C to +100Â°C (short peaks up to ~120Â°C). Above ~100â120Â°C NBR loses elasticity and chemical resistance. - Teflon (PTFE) back-up rings tolerate much higher temperatures (up to ~260Â°C continuous) and provide extrusion resistance, but they do not provide primary sealing by themselves. Conclusion: The STECKO socket elbow, automatic steel with NBR O-ring and PTFE back-up ring is generally NOT suitable for sustained high-temperature hydraulic service above ~100â120Â°C because the NBR O-ring will likely fail. For moderate temperatures within NBR limits it is acceptable; for higher temperatures consider elbows using high-temperature elastomers (e.g., FKM/Viton, HNBR with higher grades) paired with PTFE backup rings.

STECKO socket elbow, automatic steel

All products, Fittings for high-pressure hoses/

Additional information

Material	CS – steel (cast iron)

STECKO socket-plug elbow for use in hydraulic systems for mining. Material: automatic steel, galvanized. Sealing: NBR (o-ring), Teflon (back-up ring).

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
TI-GST-5-32AA	STECKO 4/6 socket-plug elbow	-	640	In stock	Enquiry
TI-GST-5-32BB	STECKO 8/10 socket-plug elbow	-	530	In stock	Enquiry
TI-GST-5-32CC	STECKO 12 socket-plug elbow	-	500	In stock	Enquiry
TI-GST-5-32EE	STECKO 20 socket-plug elbow	-	450	In stock	Enquiry
TI-GST-5-32FF	STECKO 25 socket-plug elbow	-	400	In stock	Enquiry

Do you need a larger quantity of products or a bespoke quote?

Call us: +48 61 653 02 22 or email us: tubes@tubes-international.com

SEND ENQUIRY

STECKO socket-plug elbow for use in hydraulic systems for mining. Material: automatic steel, galvanized. Sealing: NBR (o-ring), Teflon (back-up ring).