O Pressure Balanced Seals have wider cross sections that enable it to take up extra clearance in undersized plungers and in oversize packing boxes. Because the oversized seal is designed to float, it can be used regardless or packing box depth in single or in double seal arrangements.

180 Stack Packing is to be used as a split ring seal or as a direct replacement for V-type packing. It is designed for use in rough plungers, in oversized packing boxes, in undersized pistons, and in “barber pole” or in “hour glass” pistons. In sizes smaller than 6-1/2”, a maximum of 3 rings should be used with the remaining space taken up by spacers to compress the sealing rings. All sealing rings and spacers are split for easier installation.