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Gas interlocking system
Prevents gas equipment being operated without adequate ventilation.
Now a legal requirement in most kitchens.
You will need a gas interlock system in the following circumstances:
(please note this is only intended as general information
and is not a statement of the law)
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On installation of a completely new extraction/ventilation canopy
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On installation of a completely new gas pipework run
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On installation of a completely new cook line or layout
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With any fitting of Category 'B' equipment e.g. combination ovens, deep fryers, grills, charcoal griddles. This includes replacements to an existing layout
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Gas solenoid valve This valve is placed on the main gas pipe in to the kitchen. The valve closes if an electric current is not present, cutting off the gas supply to the kitchen. |
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System control panel The control panel supplies electricity to the gas solenoid valve, allowing it to open. Before it allows gas to flow, it will check to ensure the ventilation system is providing enough suction by using the sensors detailed below. The control panel also includes an emergency stop and some units can be wired in to fire alarm system as well. Additional emergency stop buttons may be added too. |
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Air pressure sensor There are two types of sensors. The first is an air pressure switch, which is attached to the ductwork and detects a pressure differential generated the by suction of the fan. These sensors are mechanical with moving parts and therefore prone to failure or blockage, which will cut off the gas supply to your kitchen too! |
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Electrical current sensor The second type of sensor is an electrical current detector, and these usually reside within the system control panel. The fan's power supply is connected to the current sensor, so it can detect when the fan is drawing electricity and how much. These sensors are much more reliable than pressure type, so we use these in our gas interlock systems. |
