Collarwings
The new passive fire protection system
Valsir Collarwings is the new range of fire stop collars produced in compliance with the most recent standards and suitable for installation on plastic waste and drainage pipes. The Collarwings fire stop collars are made of steel and painted with polyester powder fitted with special intumescent inserts which, in the event of fire, expand and squeeze the pipe thus preventing the passage of flames, combustion gas and vapours and acting as a thermal insulation.
The collars can be installed either in a vertical wall or in the slab and they have a fire resistance class of EI240 in compliance with European Standard EN 1366-3.
Reliable Protection
The resistance and insulation of at least 240 minutes (4 hours) are guaranteed by the presence of special metal elements (reinforcing flaps) that increase the effectiveness of the two types of intumescence which, when combined, provide high expansion reactivity and high mechanical resistance over time.
The latch mechanism and wide base plate with holes guarantee simple positioning and quick installation.
Operating principle
In the event of fire the intumescent material contained in the collar expands forming a “plug” thus cutting off the fire and preventing gas and fumes from spreading.
The special closure elements (reinforcing flaps) increase reactivity and efficiency of the system by completely squeezing the plastic pipe during the melting phase.
Phase 1
During the first phase of the fire the plastic pipe melts and the intumescent inserts expand. The first is more reactive and acts immediately, the second, which expands at a higher temperature results in a high performance over time.
Phase 2
During the next few minutes the intumescent elements of the collar occupy the entire section left free by the plastic pipe that is in the process of melting. The intumescent inserts expand and act on the closure elements (reinforcing flaps) bringing them to the position of exposure to the fire.
Phase 3
The intumescent inserts shut off the hole entirely in a sufficient period of time so that the fire does not spread to other areas. During this phase the closure elements (reinforcing flaps) are completely oriented and, as well as acting as a “container” for the expanded intumescent material, create another metal barrier against the fire.
Test results
The European standards EN 1363-1 and EN 1366-3 defines the standard test criteria applicable to fire collars and introduce requirements that must be met in order to ensure the proper functioning of the passive safety system.
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