PTFE Coated Seal Ring Suppliers

Destec supplies seal rings with a range of PTFE, molybdenum disulphide or graphite coatings, selected according to the application and colour coded to the base material to aid identification during installation and maintenance. Low alloy and carbon steel seal rings carry a violet blue coating, martensitic steel a olive grey coating, austenitic steel a ruby red coating, nickel chromium alloys X750, 718 and 725 a grass green coating, duplex and super duplex steels a black coating, and nickel chromium 625 plus a light orange coating. This colour coding system lets site personnel confirm the material of a seal ring at a glance before installation, reducing the risk of an incorrect material being fitted into a critical joint. The coating itself serves as a lubricant during assembly, helping the seal ring seat correctly against the taper joint faces without galling or damage, and is selected to suit the specific base material and installation method for each application.