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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 to 6 and accept inlet pressure nominally up to 300mbar and operate with outlet pressures between 4mbar and 50mbar.
Generally small size governors to 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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Dungs gas governors & regulators

Governor Type Pipe Size Max. Inlet Pressure Available Outlet Pressures Operating Temp. Weight
FRS503 3/8" 500mbar 2.5 to 200 mbar -15 to +70C 0.6Kg
FRS505 1/2" 500mbar 2.5 to 200 mbar -15 to +70C 0.6Kg
FRS507 3/4" 500mbar 2.5 to 200 mbar -15 to +70C 1.0Kg
FRS510 1" 500mbar 2.5 to 200 mbar -15 to +70C 1.2Kg
FRS515 1.5" 500mbar 2.5 to 200 mbar -15 to +70C 2.5Kg
FRS520 2" 500mbar 2.5 to 200 mbar -15 to +70C 3.5Kg
FRS525 2.5" 500mbar 2.5 to 200 mbar -15 to +70C 6.0Kg


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Econex gas governors & regulators

Econex Governors & regulators are available in threaded sizes up to 2" BSP (RP-EN10226) and from PN16 flange sizes DN40 to DN100; on request units can be supplied with ANSI flanges up to ANSI 150. Regulators suitable for medium and high inlet gas pressure supply are also available.

Governor Type Pipe Size Max. Inlet Pressure Available Outlet Pressures Operating Temp. Weight
RC02 010 1/2" 500mbar 9 to 28 mbar -15 to +60C  
RC03 010 3/4" 500mbar 9 to 28 mbar -15 to +60C
RC04 010 1" 500mbar 9 to 28 mbar -15 to +60C
RC05 020 1.25" 500mbar 13 to 23 mbar -15 to +60C
RC06 020 1.5" 500mbar 13 to 23 mbar -15 to +60C
RC07 020 2" 500mbar 13 to 23 mbar -15 to +60C
RC02 010 1/2" 500mbar 18 to 40 mbar -15 to +60C  
RC03 010 3/4" 500mbar 18 to 40 mbar -15 to +60C
RC04 010 1" 500mbar 18 to 40 mbar -15 to +60C
RC05 030 1.25" 500mbar 20 to 36 mbar -15 to +60C
RC06 030 1.5" 500mbar 20 to 36 mbar -15 to +60C
RC07 030 2" 500mbar 20 to 36 mbar -15 to +60C  
RC40 020 DN40 500mbar 13 to 23 mbar -15 to +60C 4.5Kg
RC40 030 DN40 500mbar 20 to 36 mbar -15 to +60C 4.5Kg
RC50 020 DN50 500mbar 13 to 23 mbar -15 to +60C 4.5Kg
RC50 030 DN50 500mbar 20 to 36 mbar -15 to +60C 4.5Kg
RC08 010 DN65 500mbar 7 to 18 mbar -15 to +60C  
RC08 020 DN65 500mbar 13 to 27 mbar -15 to +60C  
RC09 010 DN80 500mbar 7 to 18 mbar -15 to +60C  
RC09 020 DN80 500mbar 13 to 27 mbar -15 to +60C  
RC10 010 DN100 500mbar 7 to 18 mbar -15 to +60C  
RC10 020 DN100 500mbar 13 to 27 mbar -15 to +60C  


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Jeavons gas governors & regulators

Low Pressure Governors

Governor Type Pipe Size Max. Inlet Pressure Available Outlet Pressures Operating Temp. Weight
60DJ 1/4" 100mbar 5 to 25 mbar -20 to +70C 0.11Kg
80DJ 3/8" 100mbar 5 to 25 mbar -20 to +70C 0.15Kg
150DJ 1/2" 100mbar 5 to 25 mbar -20 to +70C 0.18Kg
J78RS 1/2" 350mbar 5 to 120 mbar -20 to +70C 0.54Kg
J78RS 3/4" 350mbar 5 to 120 mbar -20 to +70C 0.50Kg
J78RS 1" 350mbar 5 to 120 mbar -20 to +70C 0.55Kg
J48 1/2" 350mbar 5 to 160mbar -20 to +70C 1.0Kg
J48 3/4" 350mbar 5 to 160 mbar -20 to +70C 1.0Kg
J48 1" 350mbar 5 to 160 mbar -20 to +70C 1.0Kg
J48 1.25" 350mbar 5 to 160 mbar -20 to +70C 1.9Kg
J48 1.5" 350mbar 5 to 160 mbar -20 to +70C 1.9Kg
J48 2" 350mbar 5 to 160 mbar -20 to +70C 3.1Kg

High Pressure Regulators

Governor Type Pipe Size Max. Inlet Pressure Available Outlet Pressures Operating Temp. Weight
J125 3/4" 70mbar TO 8.6bar 5 to 140 mbar -20 to +70C 2.3Kg
J125 1" 70mbar TO 8.6bar 5 to 140 mbar -20 to +70C 2.3Kg
J125 1.5" 70mbar TO 8.6bar 5 to 140 mbar -20 to +70C 10.9Kg
J125 2" 70mbar TO 8.6bar 5 to 140 mbar -20 to +70C 10.9Kg
Flanged versions are available
Weights indicated are for screwed governors and include over/under pressure slam shut device


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Kromschroder gas governors & regulators

Governor Type Pipe Size Max. Inlet Pressure Available Outlet Pressures Operating Temp. Weight
VGBF-15-R05 1/2" 500mbar 10 to 30 mbar -15 to +60C 0.9Kg
VGBF-25-R05 1" 500mbar 10 to 30 mbar -15 to +60C 1.9Kg
VGBF-40-R05 1.5" 500mbar 10 to 30 mbar -15 to +60C 2.9Kg
VGBF-40F-R05 DN40" 500mbar 10 to 30 mbar -15 to +60C 4.8Kg
VGBF-50F-R05 DN50 500mbar 10 to 30 mbar -15 to +60C 7.7Kg
VGBF-65F-R05 DN65 500mbar 10 to 30 mbar -15 to +60C 12.0Kg
VGBF-80F-RO5 DN80 500mbar 10 to 30 mbar -15 to +60C 16.1Kg
VGBF-100F-R05 DN100 500mbar 10 to 30 mbar -15 to +60C 26.0Kg


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Comtherm Limited accepts no responsibility or liability for the accuracy of information provided on this web-page. technical data and dimensions should be confirmed with the relevant Comtherm Limited Sales or Technical office.