Because the Vring is very elastic (smaller Vrings can be stretched up to 2 1/2 times their free diameter) it can often be easily fitted to shafts without disassembly of the unit—even over flanges, pillow blocks, or other assemblies One size Vring can be used on a number of shaft sizes either English or metric dimension Less than 142 sizes covers a wide range of shaft sizes from 110" (2PTFE V‐ring) that have packing above and below the lubricator connection are also used for leak‐off applications However, standard packing arrangements are not specifically designed for leak‐off applications and do not have a suitable ratio of packing heights above and below the lubricator connection Body/Bonnet Availability Single and double packing arrangements can beVRings are often used in heavy industry and need to be able to withstand a considerable amount Even during installation, they are stretched over the shaft and pushed onto their subsequent seat During operation, they counteract external influences and protect the actual sealing element VRings usually wear out quickly;
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