HAWKE- Round Transits Systems Family (HRST,HRTO, Sleeves)


The Hawke Round transits systems are designed for the sealing of cables and pipes that pass through circular openings providing and effective seal against fire, gas, water...

Hawke has the following products and advantages:

  • HRTO (Single and multiple cables and pipes):

Made of zero halogen, intumescent elastomeric polymer along with metal plates. The seal is formed by tightening the compression bolts which expand the system radially.This applies pressure to the external and internal faces of the frame, creating an effective seal of the blocks and services inside. No Stayplates are needed in HRTO installations. HRTO frames are typically used for multiple cables/pipes. Tolerant Blocks and Filler Blocks are needed to seal the frame.

  • HRST (Single cables and pipes):

Made of zero halogen, intumescent elastomeric polymer along with metal plates. The seal is formed by tightening the compression bolts which expand the system radially. This applies pressure to the external and internal faces of the frame, creating an effective seal of the cable or pipe inside. HRST frames are used to seal single cables or pipes. No blocks or stayplates are required. Each HRST frame has a wide sealing range without the need for any onsite modifications.

  • Sleeves:

Made of mild steel, stainless steel or aluminium; Hawke sleeves are manufactured and finished to the highest quality. Hawke sleeves can be cast within a concrete wall, cemented into a wall, bolted to a wall or welded or bolted to a metallic structure.

  • Advantages:
1) Large Range of diameters without modifications on site.
2) Colour Code to allow a easy and safe Installation and Inspection.
3) Open System to allow installation with pipes already in place.
4) One Piece System for an easier installation and to avoid displacements and misalignments between different components.



Round Transit Systems Family