Is a pressure interlock for the main burner of the heating furnace necessary?
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The furnace was shut down due to the pressure interlock behind the constant-flame valve; is it necessary to have a pressure interlock behind the main burner valve as well?
It is necessary to note that the pressure behind the constant-light valve does not represent the pressure at the main burner. Each is their own.
So what if there is a pressure interlock on the main pipe? Can the pressure interlock behind the main burner valve be removed?
The installation location of the fuel gas pressure transmitter involved in interlocking must be in front of the burner and behind the flame arrester, that is, between the flame arrester and the burner; any other location cannot represent the pressure before the burner.
Is the fuel gas level often fluctuating? It seems you are also a colleague facing the problem of interlocks not functioning properly. Here’s a suggestion: if the processing speed of the control system is fast enough, check the difference between the measurement value before and after the transmitter; if this difference is too large, trigger an alarm but do not activate the interlock. What’s an appropriate difference.......... It tests the management of your organization! Hehe