Generator Gas Manifold (GGM) System

Safe, efficient, flexible purging and hydrogen supply |

E/One Generator Gas Manifold Systems |
E/One's Generator Gas Manifold (GGM) System 
E/One's focus on hydrogen-cooled generator gas monitoring and control systems begins at the point where cooling and purge gases enter the generator. Our Generator Gas Manifold (GGM) system is one of a range of standard or custom designed products.
The Manifold
From the point where hydrogen gas is received from the plant's bulk supply or bottle manifold, E/One's compact GGM monitors critical H2 and CO2 supply pressures, and regulates the hydrogen supply to the appropriate machine gas pressure. Manual isolation valves, arranged for easy end-user access, allow operators to control all facets of the purge process from a single location. A safety spool is also an integral feature of the GGM and assures that dangerous mixtures of H2 and Air are avoided.
GAS & Custom Displays
E/One's GGM system is typically incorporated into a Gas Station (although it is also available as a stand-alone system) and is combined with a standard GAS display, or a customized configuration that can include a range of annunciator points relating to both the gas and seal oil system. Local display of critical values in the hazard area, and interface with the control room DOS, are both standard features in any of E/One's GAS displays.
AUX Displays
E/One recognizes that gas, seal oil and control system retrofits often involve the replacement of annunciator panels. E/One has configured a number of these compact, intrinsically safe auxiliary (AUX) displays that can be installed in hazardous or safe areas.
Contact E/One to discuss your requirements and to learn more about this economical way to configure precisely what you need — or want — for your next generator outage.
Generator Gas Manifold (GGM) Specifications
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| Operating fluid |
Gaseous H2, CO2, Air |
| Maximum pressure |
150 psig |
| Maximum process gas temperature |
150 F |
| H2 and CO2 supply pressure to GGM |
125 +/- 10 psig |
H2 and CO2 supply pressure relief valves are provided and set at 150 psig |
| Generator casing pressure relief valve |
Set at 10-15 psig above casing pressure |
| Ambient temperature range |
-20 F to 125 F |
| Ambient location |
Class 1, Division 1, Group B
Zone 2 Hydrogen
(NEC/NFPA/IEC) |
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| Construction |
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| Manifold Assembly |
Pand mounted valving
Stainless steel tubing construction |
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| H2, CO2, Air supply connections |
1", ANSI 16.5 150# raised-face flanges |
| Gas delivery connections |
2", ANSI 16.5 150# raised-face flanges |
| Isolation valves |
Fire-tested to API 607, 3-piece ball valves with stainless-steel trim, live-loaded 3-way stem seal |
| Fittings |
Seal-welded tube fittings; unlimited break and re-make flexibility |
| H2/Air Spool |
Assembly includes convenient provisions that allow for air or hydrogen isolation during purge operations |
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