Based in the West Midlands, Lanesfield Engineering Seals is a leading global supplier of high quality Wire Brush Tailseals, highly regarded across international clients, including both TBM manufacturers and contractors alike.

In segmental tunnelling the gap between the inside of the tailskin and the outside of the segment is best sealed by fitting rows of Wire Brush Tailseals, which are used in conjunction with a specially formulated fibrous grease. Although the gap is varying top to bottom, side to side and even segment to segment, the mass of wires within the seal are infinitely flexible to fill that opening, and coupled with the grease, help prevent the inflow of water, boring debris and grout. Lanesfield manufacture Wire Brush Tailseals to the highest specifications to withstand the arduous and abrasive conditions.

The company was formed in 1981 originally specialising in the production of fabricated and machined products for local manufacturing companies. In 1986, the Cairo Wastewater Consortium invited Lanesfield to manufacture some trial Wire Brush Tailseals for Tunnel Boring Machines used on the construction of sewer tunnels in Cairo. Following the development of Lanesfield’s prototypes, Wire Brush Tailseals soon became the default seal option, replacing the previously used, but ineffective, rubber seals.

After 30 years of production, Lanesfield are able to build seals of any design to suit customers’ specifications. Seals are custom built, generally in 100mm and 200mm widths to suit the diameter of the machine concerned. Spring Plate Seals, Wire Brush Tailseals and seals incorporating Reverse Flow Stop Plates can all be produced. If required several seals can be factory welded together at the required radius to aid the fitting process.

Lanesfield’s versatile, responsive approach means that the seals are subject to constant evolvement and development. For example, on a recent project Lanesfield worked with the client to incorporate a durable barrier sheet within the seal, to help further protect the brushes from grout ingress. This proved to be very successful, and extended the life of the seal considerably.