SPARES
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GOVERNORS & REGULATORS
In order to ensure correct air-gas adjustment of a burner it is necessary to have a constant gas supply pressure
to the fuel input control valve; this requirement is met by the installation into the gas supply pipe work of a
gas governor or regulator.
The term gas governor or gas regulator applies to the same item; however generally in the U.K. and Europe the
term governor applies to valves that control a relatively low gas pressure supply to a constant low outlet pressure.
The term regulator normally applies to valves that accept relatively high pressure gas and control the outlet at a low usable pressure.
Low pressure gas governors are generally available in sizes from ¼” to 6” and accept inlet pressure nominally up to
300mbar and operate with outlet pressures between 4mbar and 50mbar.
Generally small size governors ¼” to ½” are not
fitted with compensation diaphragms and are therefore not suitable for operation with inlet pressure much above 60mbar.
The exact capabilities of a particular governor should be checked with the individual governor manufacturer.
High pressure regulators are usually installed as pressure reducing valves, to reduce high pressure gas, normally up to
15bar to pressures acceptable to the combustion equipment governor. High pressure regulators are common on installations involving the
use of propane or butane gases.
High pressure regulators can be fitted with integral low pressure and/or high pressure
shut off facilities, usually with a manual reset function.
All types of governor or regulator are available fitted with different outlet pressure range springs and flow control orifices
so care should be taken that these items are selected correctly for the installation.
For more information regarding the design, structure and application of Gas governors and regulators consult the
Technical (controls) section of this web-site.
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