An interlock is a system that will not allow the gas to be turned on until the ventilation system is operating correctly or indeed will turn the gas OFF if a fault develops with the ventilation system.

 If the ventilation system is not operating correctly, gases including carbon monoxide and nitrogen dioxide will build up to dangerous levels. These two gases give most concern to the Health and Safety Executives.

How does the interlock work? 

A sensor detects  airflow above a certain threshold and then the system will allow the gas isolation valve to open,  allowing  gas appliances to be used by the kitchen staff. If the air is NOT flowing, the gas isolation valve CANNOT open. To comply with CORGI regulations, actual airflow must be measured to determine if the isolation valve should open or not. A simple "fan running" interlock will not comply with the regulations.  It is not sufficient just to have a ventilation system,  it must actually be working correctly for the staff to be safe from poisoning.

  The risks of not complying with the regulations include the following: 

• Risks to the health of employees.    
• Insurance claims by staff because of a related accident. 
• A CORGI registered installer may issue an 'At Risk' or 'Immediately Dangerous' certificate which could adversely affect trade. They may completely shut off your Gas supply until you comply - affecting your profits!
• • This can and does happen - click here to see an example and how we helped sort out the situation soon as possible!
• In the event of an incident: HSE Investigation, up to a £5,000 fine and referral to Crown Court!. 

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Don't want to risk it being turned off?  CONTACT US RIGHT NOW for a quick cost effective solution!

We are able to supply and fit Gas Interlock Systems

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Control unit.

The brains of the unit - takes readings from the differential pressure switch (air flow meter) and either shuts off the gas, prevents the gas from opening or allows gas to flow depending on the readings it receives.

 Emergency Stop button

Cuts off the gas supply in the event of an emergency of any kind.

 Differential Pressure Switch.

This device monitors actual air flow through your ventilation system - if the air flow drops below a recommended flow rate then a switch activates and sends a signal to the control unit.

 Solenoid Isolation Valve.

If triggered by the control unit this device will shut off the gas supply in under one second. It will automatically reset from re-supply of electrical power from the control unit.

 These valves are manufactured to Class A in accordance with EN 161 and DIN 3391-3394 standards. Valves are protected to IP 54. Integral strainer fitted to size.

The valves come in various sizes depending on the bore of the gas pipe in your establishment and the prices are greater for larger bore pipes. For this reason it is necessary to contact us for a pre installation evaluation for us to determine the best way forward to install a system in your establishment.