Safety jaw coupling with interior thread, G 3/4, DN 17 - Riegler 107881

Safety jaw coupling with interior thread, G 3/4, DN 17, Malleable cast iron, Operating pressure max. 16 bar, Temp. -40°C to 95°C Universal standard coupling in safety design according to DIN 3238 for absolutely secure compressed air lines on construction sites or in industry. Easy to couple, secured against accidental opening: just screw the ring tight after coupling! - Robust couplings with malleable iron head, steel stem with special profile, zinc plated and yellow chromated - Chrome VI-free, with double safety lock - Large bore for increased flow rate

Standards and origin

• Customs tariff number: 73071910
• Country of origin: DE

About Claw couplings

Claw couplings join compressed air hoses with a quarter turn, without tools and without taking the line apart. The range covers DN 7 to DN 25 and is rated for operating pressures up to 16 bar. Connection is either by hose tail for inside diameters of 10 to 50 mm or by thread from G 3/8 to G 1.

What matters when choosing

• Nominal size from DN 7 to DN 25: it sets the flow and should stay uniform across an installation, because only matching sizes will couple.
• Connection type: hose tail for inside diameters of 10 to 50 mm, or threads in G 3/8, G 1/2, G 3/4 and G 1 as male and female versions, plus R 1 male.
• Operating pressure: versions cover 10 to 16 bar. The figure is given per article and applies to the complete joint.
• Material: malleable cast iron, mostly zinc-plated and yellow passivated. That finish is intended for site work and outdoor use.
• Seal: NBR, on part of the range combined with brass. The seal is the wear part and is the first thing to check if a coupling leaks.

Typical applications

• Compressed air supply on construction sites where hoses and tools change often.
• Connecting breakers, rammers and other pneumatic tools.
• Extending hose lines between compressor and point of use.
• Workshop and maintenance work where a coupling with safety collar is required against accidental separation.
• Outdoor use in low temperatures, as the range is specified from -40 °C.

The couplings follow the standard design to DIN 3489, the material is malleable cast iron, mostly zinc-plated and yellow passivated, sealed with NBR. Production is in Germany and Italy.