Dear colleagues
Could you tell me what is the key” interlock system” ? is it lock open or lock close for valve?
as i know for some critical valve that we want to have open position or close positing we use the key interlock
for example for psv line the valve should be” lock open “
if we lock the valve as lock open it means that we have key interlock or key interlock is other safety instead of lock position of the valve
Thanks
mike