Fan pumps supply pulp and a large volume of water to the forming section of a tissue machine. General Construction Company replaced the drives, cabling and motors for three 600 Hp fan pumps. To minimize downtime, we installed and tested new 10,000 lb. Allen Bradley variable frequency drives, new 2,300 volt cabling, tachometer feedbacks and ControlNet interfaces, all while the machine remained in operation on the original system.
General Construction installed new equipment, relocated existing equipment and replaced electric drives and controls. The electrical and instrument work included 16 new variable frequency drives, a safety interlock system on machine guards, photoeyes and solenoid valves.
When originally installed in 1980, this tissue machine was driven by DC motors to precisely control the speed of rolls and dryers. This project replaced all 42 motors, ranging from 5 Hp to 500 Hp, with AC motors fed by variable frequency drives. General's work included modifying motor bases, installing new motors, installing new solid state drives, and installing cabling and controls. Careful planning along with maximizing pre-shutdown preparation allowed this critical machine to get back online with minimum downtime.
General Construction installed 1,500 lin ft of cable tray, five miles of CLX cable, a 15kV switchgear, and 2,300V & 480V substations while mill operations continued normally. As new equipment was brought on line, existing antiquated equipment and feeders were removed from service without interruption to production.
General Construction installed new variable frequency AC drives, motors and a new wet dust collection system. We modified building structural steel to support additional loads from the new equipment. The majority of work was done during a 12 day outage, with shifts of over 100 craftsmen working around the clock.
All work on this project was done during an eighteen day shutdown. The scope of work included demolition of existing structures, piping, equipment bases and the salvage of equipment. General Construction direct hired and managed craft labor for the civil, structural, equipment setting and piping work.
GCC is a subsidiary of Kiewit Corporation. This link will direct you to Kiewitjobs.com where you’ll find a comprehensive list of all Kiewit and subsidiary staff opportunities. If you would like to view GCC jobs only, use the search tool to narrow results.
33455 6th Avenue South
Federal Way, WA 98003
Tel: (253) 943-4200
Fax: (253) 943-4021