ISO A and ISO B Hydraulic Couplers: Key Differences Explained
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- Issue Time
- Jan 5,2026
Summary
ISO 7241:2014 defines the performance and dimensional requirements for both Series A and Series B hydraulic quick couplings.
ISO 7241:2014 defines the performance and dimensional requirements for both Series A and Series B hydraulic quick couplings. While the two series offer similar technical benefits and are widely used, their applications differ by region and industry.
ISO A Quick Couplers
ISO A is most commonly used in Europe and is the preferred standard for forestry and agricultural equipment.
ISO B Quick Couplers
In contrast, ISO B quick couplers are more frequently used in the chemical industry and are the dominant choice in North America.
EH's ISO 7241-A Quick Couplers and ISO 7241-B Quick Couplers are designed by our expert engineers from the UK and then manufactured in our ISO 9001 and ISO 14001 certified factory in Ningbo, China. All products have passed rigorous ISO-required testing, including work pressure tests, impulse life cycle tests, and burst pressure tests, among others.