series CN

The CN series clean-break couplings (drybreak couplings) are designed for applications involving high flow rates and are used in particular in the chemical industry for the loading and transport of liquids and gases. They are also suitable for the high-volume loading of selected Group 1 media, such as gaseous hydrogen.

When loading large quantities of liquid, a secure, splash-free connection is crucial. Clean-Break couplings such as the CN series prevent media leakage and enable controlled coupling even when lines are full; as loading couplings, they allow safe and splash-free coupling and uncoupling even when hose lines are full, thereby increasing process reliability when loading large volumes.

As a low-pressure clean-break quick-coupling system with a cam-lock mechanism, they are primarily used for handling correspondingly large volumes at loading stations for lorries or trains carrying chemical liquids, liquid foodstuffs or their raw materials and additives, as dry couplings, dry-connect couplings or dry-break couplings. Further areas of application include their use as drip-free refuelling couplings.

For the high-volume transport of dangerous goods by road and rail, the CN series holds a TÜV certificate of type approval for the manufacture of transportable pressure equipment in accordance with Directive 2010/35/EU in conjunction with ADR/RID 2017 and DIN EN 14432:2014 → more information

Typical applications

• Loading couplings at loading stations for lorries and trains
• Tank couplings for liquids
• Chemical industry / food industry
• Applications involving high flow rates / large volumes

When is the CN series the right choice?

The CN series is ideal for applications

• involving low to medium pressures (up to 25 bar)
• where large volumes of media need to be transferred
• where safe and clean loading processes are required

Types:

CN-025, CN-040, CN-050, CN-080, CN-100

Nominal bores available:

NB 25, NB 40, NB 50, NB 80, NB 100

Working pressure:

up to 25 bar / 360 psi (connected and/or disconnected)

Media:

• water, compressed air, various fluids
• liquid foods / food ingredients and additives
• fuel, greases / oils,
• technical gases including hydrogen

Materials:

stainless steel 1.4404/1.4571 or similar

Advantages of the CN series:

• suitable for high flow rates
• splash-free, dry coupling and uncoupling
• can also be used with filled pipes and residual pressures of up to 8 bar
• robust and reliable for industrial applications
• sterilisable (SIP-compatible) for challenging media

Optional Certifications:

• TA-Luft – Leak rate verification in accordance with VDI 2440
• ATEX – in accordance with Directive 2014/34/EU – Category 2G/2D
• Acceptance test certificate / material test certificate in accordance with DIN EN 10204:2004 – 3.1
• FDA compliance
• ARD / RDI – Type approval in accordance with Directive 2010/35/EU in conjunction with ADR/RID 2017 and DIN EN 14432:2014 → Certificate

Frequently Asked Questions:

Which coupling is suitable for high flow rates?
→ The CN series is specifically designed for high flow rates and loading processes.
Is the CN series a drybreak coupling?
→ Yes, it is a clean-break coupling and enables an almost leak-free connection

All about WALTHER-PRÄZISION’s Clean-Break programme: → Clean-Break Couplings (DRybreak) up to 650 bar / 10,000 psi