Gas Interlock Systems
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What is the purpose of a gas interlock system?
Gas Interlock Systems are a safety device designed to shut off the gas supply to a commercial kitchen if the extraction system and/or airflow system fails. They will also ensure the gas supply is shut off if the extraction system or air flow rate doesn’t meet minimum standards in the Building & Engineering Services Legislations DW/172 (The Specification of Kitchen Ventilation Systems).
Do I need to install a gas interlock system?
Yes, according to the UK’s gas safety regulations and the British Standard BS6173, any food business operating a commercial kitchen must install a gas safety interlock system. Therefore, you need to have a gas safety interlock system fitted to comply with the law.
How does a gas Interlock system work?
Gas interlock systems monitor the successful extraction of combustion products generated by gas kitchen equipment. This can be achieved in two ways:
- Differential air pressure switch. This monitors the physical flow of air within the canopy area. The switch can be set to different levels of sensitivity to achieve a shut off at the required level of air throughout.
- Current sensor. This device can be used to monitor the electrical current being drawn by the extraction fan. The gas supply will be shut off if the fan is not using enough energy to provide the required extraction rate.
What’s the cost of a gas interlock system?
The cost of a gas interlock system can vary depending on the size of the gas pipework supplying your kitchen. However, generally expect to pay £1500 – £2000 (ex VAT) for the supply and installation of a gas interlock system.
What components make up a gas interlock system?
A gas interlock system is centred around a control panel with an emergency stop and reset button. This will be mounted on a wall within your kitchen area. The panel is wired to a solenoid valve installed in the gas supply pipework to your kitchen, this should be installed at the point of entry to the room. Depending on the interlock you have installed, the panel will also be wired to either an air pressure switch or an extraction fan power supply. The final component is an emergency stop button, this can be used to turn off the gas supply in an emergency and should be installed close to an exit.
For further information, please see the following resources:
The Health & Safety Executive’s information on Gas Safety in catering & hospitality click HERE
Or contact the MHL commercial gas interlock specialists on 0800 061 4567 firstname.lastname@example.org
For a quote to supply and install a commercial kitchen gas interlock system, please complete our short online form by clicking HERE
You can also read more about MHL’s gas interlock services by clicking HERE