Kirby Morgan 77
There are several possible ways to configure your emergency gas system, although at KMDSI we only recom- mend one method. The configuration we recommend is as follows:
Cylinder Valve Open - EGS Valve on Helmet Closed
This is the only method that we recommend. The advantages of this method are as follows:
•You only need to open one valve to activate your emergency supply.
•There is little danger of flooding your first stage regulator and ruining it.
Possible Emergency Gas Supply Cylinder & EGS Valve Configurations
Configuration | Cylinder Valve | EGS Valve | Advantages/Disadvantages |
Configuration 1 | On | Off | Advantages | |
(Regulator pressurized) |
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| • One valve to open | |
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| • First stage won’t flood | |
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| Disadvantages | |
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| • If hose or first stage leaks some | |
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| or all EGS gas will be lost | |
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Configuration 2* | Off | On | Advantages | |
(No pressure in |
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| • One valve to open | |
regulator) |
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| • No loss of gas from cylinder | |
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| if hose leaks or regulator leaks | |
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| Disadvantages | |
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| • First stage will flood and must | |
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| be serviced after each day of | |
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| diving | |
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Configuration 3* | On momentarily | Off | Advantages | |
(Regulator pressurized | then Off |
| • No loss of cylinder gas if | |
then cylinder valve |
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| hose or regulator leaks | |
closed) |
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| Disadvantages | |
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| • Two valves to open in | |
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| emergency | |
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| • Slow leak on long dive may | |
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| result in flooded 1st stage | |
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| • If dive depth exceeds pressure | |
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| in first stage, first stage will flood | |
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Configuration 4* | Off | Off | Advantages | |
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| • No use of cylinder gas unless | |
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| emergency occurs | |
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| Disadvantages | |
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| • Regulator will flood and need | |
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| service daily | |
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| • Two valves to open in | |
* Requires ability to reach cylinder |
| emergency | ||
valve without difficulty |
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