How is it possible to overpressurized a Mechanical Seal?
When Starting a pump? Turning one out? By starting the third one?
Any help would be appreciated... Thanks
It's possible to overpressure a mechanical seal at any of those points. Basically if at any time your pump case pressure is going to exceed the design stuffing box pressure of the mechanical seal you are using, you have a have a shot of seal failure due to excessive stuffing box pressure.
If you are suspecting Stuffing box overpressure for premature seal failure, unless something has changed in your application (pump re-rate, product change, line re-rate, mop change, etx) I'd look at and eliminate your usual suspects first.. (flush flow, stuffing box concentricity, stuffing face/shaft runout, etx)