This part of this European Standard EN 12067 specifies the safety, construction and performance requirements for gas/air ratio controls for inlet pressures up to and including 500 mbar of nominal connection size up to and including DN 150, intended for use with gas appliances for use with one or more fuel gases of the first, second or third families. It also describes the test procedures for evaluating these requirements and specifies information necessary for installation and use.
It applies to gas/air ratio controls for gas burning appliances that can be tested independently of the appliance.
It applies to gas/air ratio controls which function by controlling a gas pressure (or differential pressure) output in response to an air pressure (or differential pressure) and to a furnace back pressure signal input, but gas/air ratio controls which change the air pressure in response to the gas pressure are not excluded.
It does not cover mechanically linked valves and electronic systems.
NOTE Parts of the standard can be applied to the construction and performance of the ratio control function of multi-functional controls.
BS EN 12067-1:1999 history
2011BS EN 88-1:2011 Pressure regulators and associated safety devices for gas appliances. Pressure regulators for inlet pressures up to and including 50 kPa
1999BS EN 12067-1:1999 Gas/air ratio controls for gas burners and gas burning appliances - Pneumatic types