3M DBI-SALA Sealed-Blok 3400923 Self-Retracting Lifeline (50 ft, Galvanised Cable, with Retrieval)

The 3M DBI-SALA Sealed-Blok 3400923 is a heavy-duty self-retracting lifeline (SRL) with a 50 ft galvanised steel cable and an integrated retrieval function. Sealed against dust, water and contaminants, it combines reliable fall arrest with the ability to raise or lower a fallen worker, making it ideal for confined-space and rescue-ready work.

Product overview

The Sealed-Blok is one of 3M DBI-SALA’s most rugged SRLs. Because the internal brake and components are sealed, it performs reliably in harsh, dirty and wet environments and needs less maintenance. The 3400923 adds a retrieval winch, so after a fall a rescuer can crank the worker to safety. It ships with a mounting bracket for installation.

Key features and benefits

• Self-retracting fall arrest: the cable stays taut and locks instantly to arrest a fall.
• Integrated retrieval: a built-in winch lets a rescuer raise or lower a fallen worker.
• Sealed design: protected against dust, water and contaminants for harsh sites.
• 50 ft galvanised cable: durable steel wire rope for long working range.
• Mounting bracket included: ready to install on a suitable anchor.

Main industries and applications

• Confined space & rescue: tanks, vessels and manholes needing retrieval capability.
• Oil, gas & petrochemical: harsh, contaminated environments.
• Construction & infrastructure: work at height with long fall clearance.
• Utilities & maintenance: rugged, low-maintenance fall protection.

Technical specifications

Why buy from Techmaster Electronics

Techmaster Electronics is an authorised supplier of 3M fall-protection equipment in Vietnam. We supply genuine 3M DBI-SALA lifelines, advise on the right SRL and anchorage for your job, and provide dependable after-sales support. Contact Techmaster for a free consultation and a quotation.

Frequently asked questions

What is the 3M DBI-SALA Sealed-Blok 3400923 used for?

It is a self-retracting lifeline that arrests falls and, thanks to its integrated retrieval winch, lets a rescuer raise or lower a fallen worker — ideal for confined-space work.

What does “Sealed-Blok” mean?

The internal brake and working parts are sealed against dust, water and contaminants, so the unit performs reliably in harsh environments and needs less maintenance.

How long is the cable?

The 3400923 has a 50 ft (about 15 m) galvanised steel cable.

Does it include a way to mount it?

Yes. It ships with a mounting bracket. Always install it on a suitable certified anchorage and inspect before each use.