EC79 Certification and Part Marking Discontinuation

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Notification of Change: EC79 Certification and Part Marking Discontinuation

Product Name: EC79 Certification and Part Marking on Fitting, valve, Filter

Product Details: EC79 Certification and Part Marking Discontinuation

Description and Reason for Change:

As of January 1, 2026, Swagelok will no longer maintain EC79‐type approvals. As a result, all EC79‐ marked products will no longer be offered and will be removed from Swagelok catalogs.
As the industry moves away from EC79, a new specification, ISO‐19887‐1 will serve as the new standard for on‐vehicle fittings and valves. Swagelok’s impacted products will be tested to the requirements of ISO‐19887‐1 and the Clean Energy Letters of Attestation (LoA), which will be updated in 2025. Swagelok will opt not to type approve or mark products to the ISO standards.
The following products are affected by this change:

‐ HV35 and HV70 products
‐ Swagelok® tube fittings
‐ Swagelok® AbT tube fittings
‐ Swagelok® FK series medium‐pressure tube fittings
‐ SK® series valves
‐ AFS series valves
‐ CH series check valves
‐ TF and FW series filters
‐ XS series excess flow valves

Available Options:

January 1, 2026, new production of HV35 and HV70 products will no longer be available
After January 1, 2026: HV35 and HV70 products in stock will be supplied until the inventory is
depleted.

Effective Date: Januray 1, 2026

Additional questions regarding this change and/or alternative solutions should be directed to our sales & services center for further support

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For questions regarding these updates, please contact:

Ngoc Nguyen

Swagelok Vietnam QMR Assistant

Email: ngoc.hong@swagelok.com.vn

Hotline: +84 936 42 0804