Fuel Tank Sight Glass Material

[FF]

Only self closing fuel valves I have seen required a fire to activate the closing feature.

What causes the valve to close on yours?

 

[dhays]

The valves that he linked are simply a spring loaded valve. You have to hold them open. As soon as you let go of the handle they close.

 

[psneeld]

he might have been talking about Insequent's post with the gate valves and some kind of catastrophic flow limiter.

 

[stubones99]

The valves that he linked are simply a spring loaded valve. You have to hold them open. As soon as you let go of the handle they close.

Like the valve at a public water fountain Once you release it, a spring closes the valve.

 

[JDCAVE]

These are called deadman’s handles.

 

[AusCan]

Most sight glasses used in industry have safety valves which automatically shut if there is a leakage. A ball bearing seals against the seat to stop the flow similar to a check valve. These work well if the vessel is under pressure as the bearing is forced against the seat. In a pleasure boat fuel tank situation, the safety valve is likely to only slow the flow, due to minimal differential pressure.

But if they keep the surveyors and insurance companies happy, all is good.

 

[OldDan1943]

Remember, if you employ his cousin to fix the problem or marry his sister, all the objections will go away. There is a third option, find another surveyor. Explain the situation to your insurance company. If the company wont budge, an agreeable surveyor and a different insurance company.

Of course if his sister is sane and beautiful and your current wife understands..... LOL

 

[JDCAVE]

Out with the old...

...and in with the new..

Hopefully no one bitches about the brass compression fitting! The handle has to be removed in order to swing the valve around for fitting. The Allen bolt extends 2.635” from the centreline of the valve.