The graphite sealing Controller Back are used when the O-Ring or Lip Seal are not suitable.
This sealing set is composed by die-formed graphite rings with different density. According to the pressure class of the valve Controller Back is proposed in two different styles:
Controller Back 1, for sealing up to 1500 lbs
Controller Back 2, for sealing 2500 lbs
The Technical Department Carrara is available to show other sealing solutions for specific applications
energiser stainless steel
Graphite sealing for ball valve seat