WEH® Connector TW221 for bores and internal tube diameters, clamping lever actuation, max. 3 bar - Product family

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The WEH® Quick Connector TW221 is the perfect tool for filling and evacuating as well as for pressure and vacuum testing of components at low pressure ranges.

The clamping lever actuation enables a pressure-tight connection in seconds to bores and straight tubes of copper, steel and aluminium sealing the internal tube diameter. The easy handling protects operators' joints, shortens connection times and simplifies workflows.

The quick coupling is secured to the component by ist connection seal. Complex and expensive clamping and testing devices are eliminated. The elastic seals are very reliable and bridge tube tolerances of up to ± 0,25 mm (required roundness of internal tube diameter max. 0.25 mm). There is no seal adjustment required.

The quick connector is also used in the automotive industry for vacuum and leak testing with oilfree air respectively gaseous media or as plug for sealing ports. In the refrigerating and air conditioningindustry, the connector is used for filling and evacuating.

Nominal bore (DN)
2 to 4 mm, acc. to design
Max. allowable operating pressure PS
3 bar
Temperature range
+5 °C up to +80 °C
Leak rate
1 x 10-3 mbar x l/s
Manual actuation via clamping lever
Anodized aluminium, (others on request)
Sealing material
Front seal of SBR
Marketing Features
  • Connection in seconds
  • For connection into straight tubes and bores
  • High-grade materials
  • No hand tightening required
  • No seal adjustment required
  • Wide range of tube tolerances up to ± 0.25 mm

Quick coupler for pressure / vacuum testing and to be used as plug for bores and pipes. Sealing in the internal diameter Ø 9.5 mm up to 24.4 mm. The WEH® Quick connects / disconnects have found use in the automotive industry and electric mobility / manufacturing industry for testing of:

  • Engine / engine blocks
  • Pressure vessels
  • Valves
  • Transducers
  • Compressors
  • Condensers
  • Tubing systems
  • Cooling circuits of electric motors
  • Water connections of electric drives
  • Battery systems of e-vehicles

The filling connector is also suitable for filling and evacuating for refrigeration and air conditioning components.


CAD Files
Data sheets
Data sheet EN 247 KB
Data sheet DE 248 KB
Operating instructions
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