single cartridge seal with 2 ports? 2

[harps64]

Normally a single cartridge seal only has one in port! My question is, can i put an secondary port to act as an in and and out, or should I go with a double cartridge seal. Customer wants a single with 2 ports...but I have my doubts!

 

[1gibson]

I'm used to seeing a minimum of flush, drain, sometimes another flush (in/out) and maybe quench. No you do not need a dual seal if you want two ports.

You can omit one of the flush ports if not required for piping, or if there is provision in the seal chamber / pump housing. Sometimes the extra flush port is used for a pressure transmitter or gauge, to indicate seal chamber pressure.