... crushing strength 3.Cusyomized OEM/ODM Casing seal (BT type)Description:-Type: BT type,FS type,Y type,P type.-Mainly used ... casing head and tubing head bottom secondary seal-Usually a BT sealed pressure less than or equal to 5000 PSI, Two ... BT seal can be used for high pressure.-Through the injection ... range: -60°C ~ +121°C (K, U). casing seal (BT type)