Lf Rings

we are the popular exporter, manufacturer and supplier of LF Rings in Mumbai, Maharashtra, India. this LF Rings represent a major enhancement of the operational capabilities of graphite sealing rings used on valve stems.

The rings are precision moulded from high purity expanded graphite foil to which a special low friction coating has been sinter bonded. This 5Aum thick coating is sinter bonded to the expanded graphite before the moulding process to ensure maximum service life.

Typical applications:
Valves where fugitive emission control to 50ppm or less is required.
Valves that handle dry gases and other fluids, where friction on standard graphite seals is unacceptably high.
Valves that suffer judder, hesitation or erratic action due to carbon pick-up or high-spot friction on the spindle.

Prime features:
Greatly reduce the torque needed for efficient valve action.
Save on power consumption and enable smaller actuators to be used.
Lower the break-out friction for smoother valve operation.
Retain exceptionally low friction characteristics with fugitive emission control for up to 20,000 valve cycles.
Subsequent manual adjustment extends performance to 60,000 cycles.
Fire-safe capability enables rings to be used in plant subjected to fire rating tests.
Can be supplied live-loaded.