ST128 Single Turn Split PTFE Back-Up Ring


Qty Discounts Prices
  • Model: ST128
    Dimensions: Fits O-Ring Size -128
    0.086" W X 1.518"ID X 0.053"HT
    2.185mm W X 38.558mm ID X 1.347mm HT
  • 1,457 in Stock
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AS568-128 (0.086" W X 1.518"ID X 0.053"HT)

PTFE Back-up Rings are designed to prevent extrusion in rubber O-ring sealing systems. The amount of this extrusion is affected by O-ring hardness, operating temperature, operating pressure and clearance of the mating surface.

Increased Pressure: The use of Back-up Rings should be considered for systems with operating pressure above 2000 PSI. At these pressures the mechanical forces applied to the O-Ring may cause extrusion of the O-ring into the clearance gap.

Operating temperature: The use of Back-up Rings should be considered for elevated temperatures greater than 160°F (71C). The physical and mechanical properties of O-rings may be affected at these temperatures, this increasing the risk of extrusion into the clearance gap.

Industrial Trends: Today's fluid power systems continue to move towards higher pressures and temperatures. PTFE Back-up Rings should be considered as a reliable component to achieve satisfactory system performance

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