Fire collar
First Claim
1. A housing for fitting into pipework or ducting at the location the pipework or ducting traverses a partition, said housing comprising a damper arrangement and a heat detector, the damper arrangement being designed to normally enable unimpeded fluid flow through the pipework or ducting, but to seal off the pipework or ducting from fluid flow when the heat detector reacts to a preset temperature value, said damper arrangement including a cylinder or ball valve having an internal passageway which is of substantially the same diameter as that of the pipework or ducting, said cylinder or ball valve being rotatable between an open position where the passage of fluid through the pipework or ducting is unimpeded, and closed position, where the passage of fluid is prevented and said cylinder or ball valve being made from a plastic material having an intumescent material embedded between inner and outer layers of the plastic material.
2 Assignments
0 Petitions
Accused Products
Abstract
A fire collar or fire damper for location within a concrete slab of a building. The device incorporates a damper arrangement (12) and a heat detector (18, 19) comprising a metal alloy or lead which melts when a preset temperature is reached, causing the damper arrangement to seal off associated pipework or ducting.
16 Citations
9 Claims
- 1. A housing for fitting into pipework or ducting at the location the pipework or ducting traverses a partition, said housing comprising a damper arrangement and a heat detector, the damper arrangement being designed to normally enable unimpeded fluid flow through the pipework or ducting, but to seal off the pipework or ducting from fluid flow when the heat detector reacts to a preset temperature value, said damper arrangement including a cylinder or ball valve having an internal passageway which is of substantially the same diameter as that of the pipework or ducting, said cylinder or ball valve being rotatable between an open position where the passage of fluid through the pipework or ducting is unimpeded, and closed position, where the passage of fluid is prevented and said cylinder or ball valve being made from a plastic material having an intumescent material embedded between inner and outer layers of the plastic material.
Specification