The burkert 5404 bodies are pressure cast. The chance there is a defective valve is rather small. And even so, the wall thickness of the brass is more than enough to withstand a lot more pressure.

The part that will fail if hugely overpressured is the seal between stainless solenoid core and the body.

Oh well, how many Burkert-body pressure failures did we see in the 14 years of use in European Robot Wars?

Or bottle-burst disk going?