the product name is PFC 2 Guide Rings

Products: PFC-2 guide ringsHydraulic guide/ wear rings provide a bearing surface to center ther piston and rod dynamic surfaces in a reciprocating cylinder application. It can prevent metal-to metal contact and improves seal life performance. Our PFC-2 phenolic guide ring is made of solute phenolic resin containing homogenously dispersed graphite and high-quality cotton fiber.Advantages in using PFC-2 Material:High mechanical strengthAbility to sustain strong vibration under semi-static stateAbility to sustain impact loads and slightCan work under conditions where oil is littele or even with no oil at allTypical Application:Ball valves and butterfly valve bushingsPlastic mechanical guide sleevesBushings used in water conservative projectsTechnical Parameters:SpecificationColorDensity(g/cm3)Tensile Strength  (Mpa)Compressive Strength (Mpa)Hardness  HRMCoefficient of frictionTemp ???Parallel to the laminated planeVertical to the laminated planeDryOil lubricationPFC-2Black1.2-1.4?40?160?22090-1000.15-0.300.10-0.12?40 ~?130 Website:http://www.chinakintowe.com