Seal Type/Arrangement w/NO release to atmoshpere?
Seal Type/Arrangement w/NO release to atmoshpere?
(OP)
I need to find the BEST seal type/arrangement which will best keep process fluids contained and not released to the environment. We currently use a canned motor/pump, but the formation of aligomers fouls the motor cooling passages and we burn up the motors.
Looking at a standard API pump with probably a double mechanical seal. I'm looking for any advice or thoughts on exactly how to reduce to an absolute minimum the leakage of any process to the environment. Thanks.





RE: Seal Type/Arrangement w/NO release to atmoshpere?
(Rotating spring designs rarely pass emmisions testing)
Balanced inboard, Balanced Outboard,
Reversed Balanced design inboard (plus anti seat lift out design) to the seal can run as a single if the barrier fails.
The main factor, IMO, is you set up your pump, mech seal and system correctly you should not have any visble leakage.
i.e.
Shaft Run Out (typically 0.05mm)
End Play (float) (typically 0.05mm)
Concentricity of the Sleeve (if fitted) (typically 0.05mm TIR)
Concentricity of the Stuffing Box Bore (typically 0.1mm TIR)
Squareness of the Stuffing Box (typically 0.08mm TIR)
(or whatever you pump maker / seal maker rec's)
On a Dual seal (pressurised or unpressurised) you should be able to get SiC v Carbon faces on the outboard (and on the inboard ideally if chem compatible)
These faces are the best bet in a 'no visible leakage' scenario.
Consider a system with pressure switches / level switch which can give you a good feedback on how much level you have lost in your vessel/reservoir. If too much, it can stop the pump, say, so you can check it out futher.
Im sure there is more
HTH
-
Milkboy
RE: Seal Type/Arrangement w/NO release to atmoshpere?