What is the best way to maintain a steam purge on the Delta Valve? We installed our Delta Valves last month and have experienced a problem maintaining the Delta Valve steam pressure 20 psig above the feed line pressure. The problem is that we had steam purge pressure taps installed on our feed line. We found that we had to turn off the purge steam to these taps during the quench cycle due to the hammer knock so we are not able to maintain the steam pressure differential during this phase of operation. There is also the potential of someone forgetting to turn the steam purge on the taps back on before the next coking cycle.
