G4EB Marathon High Performance Plug Valve
High Cycle and Low Emissions
The G4E marathon plug valve builds on the success of the G4 valve, considerable development work has been conducted on the valve, creating a highly reliable valve designed for high cycle open / closed or modulating duty. The G4EB marathon valve has special stem seals and integral thrust collar / diaphragm enabling it to be used with confidence in difficult chemical duties.
The valve not only has its primary PTFE taper seat seal backed up with PFA diaphragm but also has a Hastelloy diaphragm welded to the thrust collar acting like a metallic diaphragm, the valves third seal. Then two additional viton or Kalrez O-ring seals with PTFE back up rings complete the sealing arrangements around the stem – 5 separate stem seals all ensuring the long high cyclic valve life. Extensive field and laboratory testing has proven the G4B Marathon valves outlast G4 valves up to 5 times more in service before stem seal wear occurs.
For further information please contact our sales office on 01706 756 400