FRÄNKISCHE ROHRWERKE SMSKu-EZF 50 Transparent Tensile-Resistant Push-Fit Coupling M50

Electricians and installers working with corrugated plastic conduits in concrete, screed, or hollow walls often need a reliable, tensile-resistant connection that won't pull apart under stress. The FRÄNKISCHE ROHRWERKE SMSKu-EZF 50 transparent push-fit coupling delivers exactly that: a secure, halogen-free, flame-retardant joint for M50 conduits, rated IP67 when properly installed. Its transparent polypropylene body allows quick visual inspection of the conduit seating, while the push-fit design speeds up installation without tools.

Key specifications

• Type: Push-fit coupling (Steckmuffe)
• Nominal size: M50
• Material: Polypropylene (PP), transparent
• Tensile-resistant: Yes (zugfest)
• Halogen-free: Yes
• Flame retardant: Yes
• Protection class: IP67 (with compatible conduits)
• Operating temperature: -25 °C to +105 °C
• Pressure resistance: 750 N (medium)
• Impact resistance: Medium (M)
• UV resistance: Limited (indoor or protected outdoor use)
• Standard: DIN EN 61386-22
• Conduit inner diameter: approx. 40.3 mm
• Coupling outer diameter: approx. 58 mm

Why choose it

The SMSKu-EZF 50 stands out for its tensile strength, preventing accidental disconnection in demanding installations. The transparent housing is a practical advantage: you can confirm the conduit is fully inserted, reducing callbacks. Being halogen-free and flame-retardant makes it safe for use in public buildings where fire safety is critical. Its wide temperature range and IP67 rating ensure long-term reliability in harsh environments.

Ideal use cases

• Connecting corrugated conduits in concrete and screed installations
• Protecting cable runs in hollow walls and ceilings
• Outdoor installations requiring IP67 protection (with proper sealing)
• Public buildings where halogen-free and flame-retardant materials are mandatory

Good to know

For optimal performance, use with FRÄNKISCHE ROHRWERKE corrugated conduits such as FFKu-Flex, FFKu-EL-F, or FFKu-EM-F. The coupling is not intended for permanent outdoor exposure without additional UV protection. Always verify conduit insertion depth through the transparent body before finalizing the installation.