PE Secondary Seal  The PE Secondary Seal Bushing is a onepiece seal assembly inserted into the bottombowl of a tubing or casing spool and is selfenergized when slipped over the casing stub.It is available in standard API casing sizes aswell as non api sizes and is built to providesafe, dependable service in pressure applicationsup to 5000 psi.     PE 二次密封装置 PE二次密封衬套是一种组合而成的安装在油管头或套管四通底部内腔中的自激发密封装置。密封圈内孔与套管外圆紧贴而产生密封。它既可以适用于标准的API套管也适用于非API标准套管，在最高5000PSI压力下可实现安全、可靠的密封。Btm.Flange SizePocketSizeTop Flange PressureAllowable Pipe O.D. forSecondary Seal Bushings11"9"5000PSI3-1/2" - 7-5/8"13-5/8"10-3/4"5000PSI7" - 9-5/8"16"10-3/4"5000PSI7" - 9-5/8"20"05000PSI0 底部法兰尺寸内腔尺寸顶部法兰压力（油管头或套管四通）适用于该二次密封套的管子外径11"9"5000PSI3-1/2" - 7-5/8"13-5/8"10-3/4"5000PSI7" - 9-5/8"16"10-3/4"5000PSI7" - 9-5/8"20"05000PSI0