Tankwagen couplings (TW)2023-09-20T08:29:42+02:00

Tankwagen couplings (TW)

  • Tankwagen couplings

Tankwagen couplings (TW) – general information

TANKWAGEN couplings (TW couplings, tanker couplings, eurocouplings) are commonly used for loading and unloading of tankers and in installations in the chemical, petrochemical or food industry. TW couplings are made according to EN ISO 14420-6 standard (former DIN 28450).

TANKWAGEN couplings are intended mainly for fluids, sometimes used for dry bulk products and gases (except for liquefied gas and steam). TW coupling consists of two basic parts: female (MK) part and male (VK) part. The female (MK) part couples with the male (VK) part by pushing one into the other. Turning the ring of the female (MK) part with the open handle causes both MK and VK parts to connect and seals the coupling. Folding the handle in locks the ring and secures the coupling from opening.

TW couplings are available in DN50, DN80 and DN100 sizes (2″, 3″ and 4″). The couplings are made of AISI316 stainless steel, brass or aluminium; seals are made of CSM (hypalon), NBR and many other materials. Working pressure up to 16 bar. TW couplings (both MK and VK parts) can be screwed onto BSP pipe thread (2″, 3″ and 4″), sealed flat. Typically, TW coupling is connected to the hose using KRS fitting with BSP male thread and a hose tail adjusted to be either fitted in a rubber hose with RS safety clamp or crimped with a ferrule.

seal materialcolourtemperature range
polyurethane ( (PUR, vulkollan)bluefrom -20°C up tp +70°C
nitrille (NBR, perbunan)blackfrom -20°C up tp +70°C
hypalon (CSM)greenfrom -20°C up tp +130°C
viton (FPM)black with red dotfrom -20°C up tp +120°C
PTFE (PTFE)whitefrom -20°C up tp +220°C
EPDMblackfrom -20°C up tp +100°C
vamacblack with two red dotsup tp +200°C


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Type of material:

Stainless steel Tankwagen couplings

Stainless steel Tankwagen couplings

Brass Tankwagen couplings

Brass Tankwagen couplings

Aluminium Tankwagen couplings

Aluminium Tankwagen couplings

List of products:

Tankwagen couplings - VK type

Tankwagen couplings – VK type

 tank connectors

Tankwagen couplings – MKV type

złącza do cystern

Tankwagen couplings – MKH type

TW DIN11851

Tankwagen couplings – MK type

Eurocouplings TW

Tankwagen couplings – MB type

Tankwagen couplings - VB type

Tankwagen couplings – VB type

Seals for TW couplings

Seals for TW couplings

Accessories for TW couplings

Accessories for TW couplings

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FAQ – Tankwagen couplings (TW)

What temperatures can TW couplings operate at?2023-08-11T12:44:20+02:00

According to DIN 28450 standard, TW couplings can operate at temperatures up to +65°C. If they need to be used at higher temperatures, it is necessary to consult Tubes International’s Technical Department.

Do you always need to use GSD profiled seals?2023-08-11T12:46:35+02:00

No, TWF or TWO profiled seals can be used instead of GSD coupling seals, but we recommend checking the tightness of the connection each time.

Can TW couplings be used for food substances?2023-08-11T12:47:21+02:00

We do not recommend using TW couplings for foodstuffs. Due to their nature and construction, TW couplings do not meet the standards for couplings intended for food substances.

Do you need any special tools for connecting TW couplings?2023-08-11T12:47:57+02:00

No, although a rubber mallet can be optionally used if minor leaks occur at the connection or for replacing the seal with a new one.

What should be considered when selecting the material of the coupling?2023-08-11T12:48:48+02:00

First of all, the chemical resistance of the coupling material to the medium, and then, the compatibility of the sealing material.

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