Exercises

 

 

 

 

 

 

 

Pressure-break vessel

USING A PRESSURE-BREAK VESSEL : This is probably the best solution. In a correctly sized vessel, the water velocity will be less than 0.1m/s, i.e. nearly zero. However, it must obey the '3 D' rule as in diagram 1 below. 

There is therefore no pressure drop across the vessel, and it is certain that the pressure is identical in both the primary and the secondary system.  Hence the name 'pressure break' vessel.

In order that the temperatures are distributed correctly in the vessel and in the system, various connection points are judiciously placed.  

 EXERCISE : 

  1. In your opinion, which of the above four arrangements is the best?

  2. Where should the expansion chamber be located, and how can its operation be checked?

  (Solution : Refrepair Manual pages 620 to 626)

 
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