Fail-safe aspects of the fuel shut-off valve
Operation and safety of the fuel shut-off valve for burners and boilers
When we talk of system safety, we immediately think of a fail-safe device such as the fuel shut-off valve which interrupts the fuel flow to the boiler when a higher temperature than the pre-set safety one is registered on exit.
Calibration of a complex mechanism such as the fuel shut-off valve takes place on a work-bench certified according to INAIL parameters, which can then guarantee the certificate which will accompany the valve even after the system’s installation and testing. It is signed by an official from the entity and indicates the valve’s main parameters and serial number which will also be repeated on the ID plate.
Fail-safety is ensured by the fact that the fuel shut-off valve must be armed manually in order to work and allow the passage of the fuel; once the safety parameters are exceeded, the fluid’s change of state commands its release and shut-off, this also occurs in the unfortunate case that the capillary which connects the valve to the temperature sensor should break.
Once the fuel shut-off valve has been tripped, rearming can only take place when the system has returned to normal working parameters.
Calibration of a complex mechanism such as the fuel shut-off valve takes place on a work-bench certified according to INAIL parameters, which can then guarantee the certificate which will accompany the valve even after the system’s installation and testing. It is signed by an official from the entity and indicates the valve’s main parameters and serial number which will also be repeated on the ID plate.
Fail-safety is ensured by the fact that the fuel shut-off valve must be armed manually in order to work and allow the passage of the fuel; once the safety parameters are exceeded, the fluid’s change of state commands its release and shut-off, this also occurs in the unfortunate case that the capillary which connects the valve to the temperature sensor should break.
Once the fuel shut-off valve has been tripped, rearming can only take place when the system has returned to normal working parameters.
18/12/2014
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