Temperature, Pressure & Extrusion Gaps

***MAXIMUM RECOMMENDED DIAMETRAL EXTRUSION GAPS*** When sealing high pressure and/or temperature the clearance between the hardware "Extrusion gap" becomes very important. At high pressure and/or temperature the jacket material can extrude into the gap causing premature sealing failure. The extrusion gap should be held to the minimum practical or should not exceed above values. Back-up rings are manufactured from a harder material than the seal material.