Setting of safety valves for pipes in heating plate-type heat exchanger units
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The process is roughly as follows: return water – safety valve – pump – heat exchange unit – supply water. I would like to ask why the safety valve is installed on the return water pipeline and what its function is
At the pump inlet? It is likely to be a measure to account for the low design pressure of the inlet pipeline, as a protection against excessive backflow pressure from the pump.
I have not seen many cases where safety valves are installed on the return water pipeline. Unless there are special process requirements, as the original poster suggested, I think it is possible to prevent excessive backflow pressure from causing damage to the pump; this makes sense as well. It depends on the specific situation on site, so it’s best to consult those responsible for the process design or the engineers involved in your project. I hope my answer is useful to you.
Since the water added by the make-up water pump can cause excessive pressure, a safety valve is installed for safety purposes; it activates automatically to release pressure when it reaches the set value, thereby ensuring safety