I'd like to respectfully suggest that, if the ball seals at all, the
force of the oil pressing on the ball is going to be far greater than
the force of that little spring.
Assuming the ball seat is 1/8" in diameter, 400 psi of oil would exert
about 5 pounds of force on the ball. I haven't tried to measure the
force of that spring, but it's surely much less.
Tony Rhodes wrote:
> However, unless you used an original bolt for the pressure
> tester, maybe you are not seating the
> pressure relief ball perfectly, resulting in pressure loss...
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