50 keeping in mind that the objective is to cure the pressure imbalance between zones 42 and 40 by raising the pressure in zone 50 to a point of bypassing the seal 46 those skilled in the art will appreciate that the c shaped ring seal 46 is configured to resist flow or pressure loss from zone 42 into zone 50 but is also able to permit flow and pressure migration when the pressure in zone 50 is raised substantially over the pressure in zone 42 during normal operations some leakage from zone 50 into zone 42 is acceptable because the volume will be insignificant to affect the operation of the valve assembly the seal 46 has a u shaped cross section and is a commercially available seal fig3 is an alternative embodiment showing parts 30 and 36 having a small clearance 62 that is closed off by a seal 64 in a surrounding groove 66 the equalization concept in fig3 is the same as in fig2 pressure is introduced from zone 50 which typically will come from the surface at a predetermined differential between zones 50 and 42 the seal 64 will be pushed further back into groove 66 and flow will bypass the seal 64 increasing the pressure in zone 42 to get it closer to the pressure in zone 40 so that the connecting rod assembly 20 can be safely operated with little to no risk of damage to the assembly 20 or its seal 48 or the ball 12 itself those skilled in the art can appreciate that the disclosed modes of pressure equalization are cheaper and faster than running a tool into the valve assembly to provide access into zone 42 by.