The Gas Gravel Wiping System
Read more about PWT's Payoffs for Wire Drawing solutions
Read more about PWT's environmentally friendly Gas Atmosphere Process
Read more about PWT's special galvanising preparation that eliminates the need for acid cleaning or fluxing
Read more about our unique single dip Galfan® (ZNA15%) or ZNA110% alongside the standard zinc
Read about how PWT's revolutionary EMW® and other wiping systems achieve cost per ton reductions of 25% or more
Read about how to improve efficiencies with PWT during the quench and wax process
Read about a number of cost efficient options achieved with PWT's Take-up Frame products
EMWFurther information
PadWipeFurther information
Gas GravelFurther information
Unique one-dip galvanising
The PWT designed and installed Gas Gravel Wiping System is for galvanising operations that require a thicker layer of zinc at wire speeds normally in the range of DV 120 to DV 160.
Essentially the wire passes through a loose gravel bed in a controlled atmosphere consisting of hydrogen sulphide and a reducing gas for Class 3 Coating. Out of this a zinc sulphide layer (shiny, non-oxidised coating) is formed.
The zinc sulphide layer has greater tensile strength and elasticity than zinc oxide and allows a fast withdrawal of the wire without a break-down of the skin.