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[rohatgianoop]

Dear all

 

can anyone guide me how to calculate the U shape liquid seal depth for vacuum system.

 

i have a condensor working at 6 kpa pressure. whose condensate goes to a tank.

i propose to add 1 more condensor in series. the consdensate of both the exchangers goes in the same tank via interconnected pipe.

 

what should be the depth of u seal in 1st condensor so that vacuum does not passes to the drain tank

 

Thanks 

[cea]

The intent of U seal is to have pressure balance across it. This is done by providing liquid head which in turn decides height of liquid seal..

Thus

 

Liquid Seal (mlc) = Barometric pressure (mlc) - Condenser Pressure (mlc).

 

This remains unaltered even if you add on more exchanger in parallel.

 

However, significance of condenser in series is not clear.