REF #1071
B12 Series
ISO B12 series compressed air couplings for industrial applications requiring high flow rates. The ISO B (also referred to as PCL B12) coupling standard is specified for environments where air volume is a priority: large industrial compressor systems, high-flow machinery, and plant applications where standard workshop coupling sizes would restrict air delivery. The B12 designation relates to the 12mm bore diameter, giving it a larger flow capacity than the 60 Series or A-style couplings.
Swivel and fixed adaptors are available with BSP thread options. The ISO B12 coupling is not interchangeable with A-style, 60 Series or 100 Series PCL couplings. If you are replacing couplings in an existing ISO B installation, ensure the entire system uses the same coupling standard throughout.
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REF #1072
ISO-B12 Adaptors
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£3.97 INC VAT
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ISO B12 couplings: what to know before you order
The ISO B12 coupling is the industrial high-flow standard in the PCL range. The B12 designation refers to the 12mm bore diameter of the coupling, which is larger than both the 60 Series and 100 Series. That larger bore means less restriction to air flow, a meaningful specification advantage in applications where high-volume compressed air delivery is needed: heavy industrial automation, large-bore spray equipment, or production line air systems with multiple simultaneous tool connections.
The ISO B standard is an international standard, not a PCL-only designation. B12 couplings from different manufacturers that conform to the same ISO specification should be physically interchangeable within a system, though it is always worth confirming compatibility, particularly in high-pressure or safety-critical applications. This is distinct from the A-style, 60 Series and 100 Series ranges, which are PCL-specific and not cross-compatible with other brands.
When specifying ISO B12 couplings, confirm the thread type and size needed at each connection point. BSP threads are standard in UK installations. Swivel adaptors should be used wherever the hose connection sees rotation during use; fixed adaptors suit static take-off points. If you are specifying a system rather than replacing individual fittings, talk to our team on 01282 604002 to ensure the coupling standard is consistent throughout.
Frequently Asked Questions
What is an ISO B12 coupling?
The ISO B12 coupling is a compressed air coupling standard defined by the ISO 6150 B specification. The designation refers to the 12mm internal bore diameter of the coupling body, which gives it a higher air flow capacity than smaller coupling standards such as A-style or the PCL 60 Series. It is used in industrial compressed air systems where air volume is a priority.
What applications use ISO B12 couplings?
ISO B12 couplings are specified for industrial compressed air applications requiring higher air flow than general workshop couplings can deliver. Typical uses include large industrial compressor systems, high-flow production equipment, large pneumatic actuators and plant machinery where the smaller bore of workshop coupling standards would restrict air delivery.
How does the ISO B12 compare to the PCL 60 and 100 Series?
The ISO B12 has a larger bore diameter than both the PCL 60 Series and 100 Series, making it suited to higher-flow industrial applications. The B12 is a different coupling standard and is not physically interchangeable with either of those ranges. The choice between these standards should be based on the air volume requirement of the connected equipment.
Are ISO B12 couplings compatible with other coupling standards?
ISO B12 couplings are not directly compatible with A-style, 60 Series, 100 Series or bayonet coupling ranges. If you need to connect ISO B12 equipment to a system running a different coupling standard, you will need a conversion adaptor rated for the pressure and flow of your system.
What thread sizes are available for the ISO B12 range?
The ISO B12 range is available with male and female BSP threads. Confirm the thread size and type (BSPP or BSPT) used at each connection point in your system before ordering. For system specification queries, call 01282 604002.