Kh. Areerut
To answer your question
1. All PRV is for oil service (lube oil)
2. For pump pressure or pump discharge pressure, I do not know krub. This is because we don’t have pump data. The drawing that we have do not tell.
but we know from the drawing that PRV set pressure is 5.17 BAR (example) and pump capacity is 21 M^3/ Hr.
So we suspect that pump pressure is less than 5 BAR.
3. As for AL-1T vs. AL140 model, we check and see that the dimension is off my 7 mm; This will be a problem with pipe spool is too short
We are unsure if this model will work or not. Let my team go to the equipment and check tomorrow and we will let you know.
As for valve specification, it is ok krub. AL140 model is stainless steel, how about brass/ bronze material ? can you check krub.
Will let you know tomorrow if PRV will work or not.