Safe and easy defuelling for natural gas with WEH® Defuelling nozzles 

| Germany: Illertissen | Source: WEH GmbH

WEH® Defuelling nozzles TK6 CNG, TK21 CNG and TK23 CNG


Defuelling or emptying CNG cylinders bundles (e.g. for trailers) is a frequent challenge for service technicians. Service staff must be sufficiently trained to ensure that the procedure is performed properly and safely.

When it comes to emptying CNG tanks, a distinction is made between emergency defuelling and defuelling for maintenance purposes, such as for repairs to the natural gas tank.

The defuelling nozzle TK23 CNG by WEH was designed for this particular purpose and it is ideal for emptying cylinder bundles, that means for discharging CNG from cylinder bundles.

The nozzles are equipped with push-pull actuation and the unique WEH® Jaw locking mechanism for extra-easy operation.

Simply attach the nozzle to the receptacle and push the sliding sleeve to the front to create a pressure-tight connection.

Now open the shutoff device behind the receptacle and defuelling can begin. The plastic thermal covering protects service technicians’ hands against frostbite.

The defuelling nozzles TK6 CNG for passenger cars and TK21 CNG for busses and trucks are available for defuelling CNG tanks within vehicles.

The defuelling nozzles are used for maintenance and inspection of natural gas vehicles. All pressure and fuel tanks must be emptied for any maintenance measures. Defuelling nozzles by WEH® have proven to be the ideal tool for this purpose.

Defuelling takes place via the vehicle’s fuelling connection. Simply attach the defuelling nozzle to the receptacle, turn the opening spindle until it stops and the receptacle is pushed open. Now the fuel tanks can be emptied via the medium outlet at the side.

Of course, WEH also provides a comprehensive product portfolio for natural gas refuelling, ranging from fuelling nozzles, breakaways and filters for fuelling stations through to receptacles and check valves for vehicles. See for yourself at

General information WEH Company

WEH was early to recognise the future of alternative energy sources, and has since become the global market leader in alternative refuelling components.

As early as 1986, WEH began extending its product range to include alternative refuelling components for natural gas and hydrogen and founded its WEH GmbH Gas Technology affiliate.

The NGV1 CNG fuelling system developed by WEH has become a standard applied worldwide.

WEH is certified according to ISO 9001 and the European Pressure Equipment Directive (PED). It employs more than 160 employees and conducts business in more than 40 countries worldwide.


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