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Home > Gas Produts > GG/GGB/GGO |
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Air Gas Ratio Regulators, Type GG/GGB/GGO |
DATA SHEET
GG_GGB_GGO |
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FEATURES :
- Maintains Constant Air-Gas Ratio.
- High Precision Regulation.
- Wide Regulation Range.
- Available with Inlet Pressure Compensation Diaphragm.
- Inlet Pressure up to 200 mbar.
- Practically Maintenance Free.
- Compliance EN 746-2.
- Problem free adjustment during operation is possible.
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| APPLICATION : |
| Ratio Control Valves maintain constant air & gas ratio and regulate the gas pressure. |
| Type GG |
For Steady Control |
| Type GGB |
For On- Minimum-Off Control |
| Type GGO |
Zero pressure regulation
(The gas inlet pressure must always be higher than the control pressure). |
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| CONSTRUCTION : |
| Valve Body |
Aluminium Silicon Alloy |
| Valve Disc |
Aluminium with vulcanized Perbunan (Nitrile Seat) |
| Compensating Diaphragm |
Perbunan/Nitrile |
| Working Diaphragm |
Perbunan/Nitrile |
| Valve Seat & Stem |
Aluminium |
| Size Range |
15, 20, 25, 40 to 80 mm |
| End connection |
Screwed to BSP(F) / NPT(F) upto 65 mm; 80 mm flanged |
| Working Temperature |
(-) 15° C to (+) 60° C |
| Inlet Pressure |
up to 200 millibar |
| Combustion Air Pressure |
GG - 0.5 to 120 mabr & GGB - 0 to 120 mbar |
Controlled Outlet
Pressure (Variable)
For GG Type
For GGB Type |
GG - 1.2 to 120 mbar
GGB - 0 to 117 mbar
Outlet Pressure=Control Pressure(Combustion Air)
Outlet Pressure=Control Pressure less 2 to 4 mbar |
| Differential Pressure |
Maximum 100 mabr (Between Inlet & Outlet) |
| Fluids |
All Gases - Natural Gas, LPG,Biologically Produced Methane, Special Version available for Air |
| Regulating Pressure Range |
GG ( 10:1 ) with Control Pressure 50 to 0.5 mabr
GG ( 08:1 ) with Control Pressure 32 to 0.5 mabr
GG ( 06:1 ) with Control Pressure 19 to 0.5 mabr
GG ( 05:1 ) with Control Pressure 12.5 to 0.5 mabr |
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INSTALLATION :
Safety Solenoid Valve must always be fitted upstream of Air Gas Ratio Regulator and in the direction of flow marked on the valve body. The spring retaining dome must be installed downwards. Spring force of GG can be adjusted by means of a 6 mm Allen key. During installation of GG/GGB, fixed orifice plates or variable flow resistor must be used in the gas line as well as combustion air pipeline. These orifice plates will determine and fix Air Gas ratio required for complete combustion. When using GGO, variable flow resistor / orifice plate should be provided in the gas pipe line, before mixture (Injector). If combustion air pressure is higher than the gas inlet pressure, the variable flow resistor should be used to turn down the gas control pressure. |
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NOTE :
Gas inlet pressure must be always higher than the control pressure. When supplied threaded version size 15 to 50 MM, is provide with Internal By-pass connection. When supplied with Externally Screwed or Self Casted flanges, requires additional external impulse line to be fitted Size Rp 3/8” (at distance of minimum 5 pipe size after outlet of Air/Gas Ratio control).
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GENERAL FEATURES :
‘GG’ For steady control with a spring fitted for compensating the weight of the diaphragm assembly, provided with small diameter internal impulse connection.
‘GGB’ For On, minimum Off control. No spring provided; supplied for by-pass with low fire operation. Large size valve requires external impulse.
'GGO' For zero pressure control, with spring for compensating the weight of the metering assembly, has a small
diameter internal impulse line. Zero pressure governor GGO for injector (Pre Mix Type) burner. |
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| DIMENSIONAL DETAILS : |
| Model |
Size
mm |
Connection |
Dimensions |
Approx
Weight
kgs. |
| L |
H1 |
H2 |
ØD |
C |
H3 |
| GG 15 R02 |
15 |
Rp 1/2 |
90 |
45 |
119 |
98 |
29 |
100 |
0.7 |
| GG 20 R02 |
20 |
Rp3/4 |
100 |
40 |
150 |
120 |
38 |
119 |
1.1 |
| GG 25 R02 |
25 |
Rp 1 |
110 |
40 |
155 |
132 |
46 |
122 |
1.3 |
| GG 40 R02 |
40 |
Rp 1 ½ |
158 |
55 |
210 |
190 |
70 |
135 |
3.1 |
| GG 50 R02 |
50 |
Rp 2 |
190 |
73 |
250 |
240 |
88 |
177 |
4.6 |
| GG 65 R02 |
65 |
Rp 2 ½ |
190 |
73 |
250 |
240 |
88 |
177 |
4.5 |
| GG 80 F02 |
80 |
3 |
380 |
102 |
425 |
310 |
115 |
267 |
10 |
| GGB 15 R02 |
15 |
Rp 1/2 |
90 |
45 |
119 |
98 |
29 |
100 |
0.7 |
| GGB 20 R02 |
20 |
Rp3/4 |
100 |
40 |
150 |
120 |
38 |
119 |
1.1 |
| GGB 25 R02 |
25 |
Rp 1 |
110 |
40 |
155 |
132 |
46 |
122 |
1.3 |
| GGB 40 R02 |
40 |
Rp 1 ½ |
158 |
52 |
210 |
190 |
70 |
135 |
3.1 |
| GGB 50 R02 |
50 |
Rp 2 |
190 |
68 |
250 |
240 |
88 |
177 |
4.6 |
| GGB 65 R02 |
65 |
Rp 2 ½ |
190 |
73 |
250 |
240 |
88 |
177 |
4.5 |
| GGB 80 F02 |
80 |
3 |
380 |
102 |
425 |
310 |
115 |
267 |
10 |
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| SPECIFIC GRAVITY : |
| Natural Gas |
0.62 |
| Town Gas |
0.45 |
| LP Gas |
1.56 |
| Air |
1.0 |
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| Note: |
Technical specifications details & dimensions are subject to change without prior notice.
Dimensions in the table are approximate subject to final confirmation by AVCON. |
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