Claron Style CPI is designed for use as a single acting rod seal. The seal is a precision moulded Nitrile rubber sealing element with a fabric reinforced base and an acetal back up ring to resist extrusion. The acetal back up ring allows larger clearances and higher pressures. Designed with initial radial interference to effect low pressure sealing, at higher pressures the seal is progressively energised thus increasing the sealing force. Rubberised fabric has the advantage of retaining fluid within its surface so reducing both friction and wear. Style CP is produced with radial grooves incorporated into the top of the seal on the pressure side. This innovative design ensures a rapid energisation of the seal without excessive end float and resultant wear