Specifications

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i) Terminology.
a) "Quench"
- To provide a liquid barrier, which is not, induced to flow through the seal
area by any external means.
b) "Flush"
- To provide a liquid barrier that is induced to flow through the seal area
by an external means.
ii) Quench or Flush Media.
The media used for quenching or flushing a seal area must be fully compatible
with the pumped media, and the relevant materials of construction of the
pump.
Special consideration must be given to the temperature limitations of the
media to ensure that no hazards are created, e.g. risk of fire or explosion.
This seal arrangement requires a supply of media to the outboard side of the
mechanical seal to quench or flush the seal area. The nature of the pumped
media and the specific duty conditions will determine whether a 'quench' or
'flush' is required.
A quench provides a static head. The media vessel should be mounted a
minimum of 1.5 feet above the pump, preferably directly above the seal area.
The interconnecting pipework should be as straight as possible, avoiding
horizontal runs, and with the minimum number of bends and restrictions.
For a suitable flush, the media must be supplied at a flowrate of three litres per
minute per shaft seal (0.8 US Gal per min).
Note: The limiting 'flush' or 'quench' pressure in any application is 0.5
bar (7 psi).
WARNING
WARNING