What to do if the lockout safety valve trips?
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What should I do if the safety valve on the lock cylinder keeps tripping?
Close the valve before the safety valve and install a blind flange behind it.
First, it is necessary to determine the reason why the safety valve activated – was it overpressure in the lock hopper or was the setting for the safety valve’s activation pressure too low? If there is overpressure, it is necessary to adjust the charging rate, or consider whether the logic sequence for locking the hopper should be to close the charging valve first or to open the hopper inlet valve first ； Or reduce the system operating pressure. If it’s a problem with the safety valve itself, then simply address the fault in the safety valve. If the safety valve is isolated, it can no longer perform its safety function; this is not recommended!
Lower the lock hopper to atmospheric pressure, and allow the quenching chamber to hold the slag for a short time. Release pressure from the lockout device, remove the safety valve as soon as possible, and re-pressurize. If it still cannot be used after suppression, a new safety valve must be replaced!
Excuse me, for the second floor: a blind plate is installed after the valve. How is then the function of this safety valve reflected?
The moderator of Lockfight Overpressure has explained it very clearly. The normal slag collection system is connected to the gasification furnace. If the punching pressure is high, close the front valve of the punching valve. I saw a manufacturer close off the valve in front of the safety valve.
Does the safety valve for the lock cylinder activate during stamping? If so, it is recommended to add a pressure interlock to prevent over-pressurization.
May I ask by how much is the setting pressure of your safety valve higher than the pressure of that pump used for stamping? Could it be that the outlet pressure of your pumping pump is too high? If that’s the case, the solution mentioned on floor 6 can be applied, namely by reducing the flow rate by closing the manual valve in front of the pumping valve. If it’s not due to this reason, then we need to consider whether there is a problem with the safety valve; in that case, the setting for the pressure at which it activates needs to be adjusted. If time is limited, it can be temporarily disabled, and the issue can be addressed slowly after the machine stops running.
It is best to install two safety valves, each equipped with a front and a rear shut-off valve, one in use and one as a backup.
1. The stamping pressure is too high; reduce it by closing the valve and then the manual valve. 2. The set value for the safety valve to activate is too low; reset the activation value. 3. For safety reasons, never block the safety valve completely.