quench question

[fludunlimited]

What dose 4 bar minimum mean.

Quench: Oil or positive pressure (4 bar minimum) to below 125°F (50°C),

 

[69_knives]

The weight of all the molecules of N, O2, and H2O bearing down at sea level is called absolute barometric pressure and is 14.5 PSI. 14.5 PSI is also rated as 1 bar or vice/versa. so 4 bar would be 58 PSI.

 

[fludunlimited]

Thanks, I thought it had somthing to do with barometric pressure but wasent sure. I have my quench plates it a vise and go way over 58 psi.