Smoke-extraction equipment

Tender description

Tunnel Ventilation System Maintenance Large Scale Maintenance in 2017 of 2 ventilation stations, 1 UK and 1 France. System Overview: ABB FLAKT design, with the following equipment at each station: — 2 Main fans, Flakt FPXC 200/100 (390kw, 86m3/s, axial flow, Hydraulically Controlled Variable Pitch Impeller). — 2 Auxiliary cooling fans. — 2 Central hydraulic units. — Associated control panels and instruments. Works: The 4 main ventilation fans will be removed from service for overhaul. 1 ventilator will be out of service at a time, each ventilator will be dismantled, and the impeller will be separated from the motor. The impeller and motor will then receive an overhaul and on completion the ventilator will be rebuilt, tested and re-commissioned. The ventilator must successfully complete a loaded test run before the next ventilator can be taken out of service. Due to our commercial service constraints the test run may be carried out during a night shift or over a weekend.