Re: LPG Question

Posted by MT Pockets on January 04, 2005 at 21:14:26 from (152.163.101.13):

In Reply to: Re: LPG Question posted by NDS on January 04, 2005 at 17:27:48:

Hi W6Tractor. NDS is correct about everything he said. There is an excess flow valve on 4 valves on that tank. One each on Liquid withdrawal,vapor withdrawal,filler connection, and vapor return connection. They are made on to the male threaded parts of these valves and are on the inside of the tank where you can"t see them. The only valves that don"t have them are the 80% outage gauge and the pressure relief valve. The excess flow valve will stop 99.9% of the flow in the event of a ruptured line. They will also close if you open a valve too quickly to a line with little or no pressure in it. To reset the excess flow valve, simply close the valve. Momentarily, you will hear a click,as the gas bleeds through a tiny weep hole in the excess flow valve. The valve you are asking about is called the vapor return. It"s purpose is to return the vapor that is being displaced by Liquid during filling to the storage tank. That"s the answer to the question on the test. But in "cotton country" as NDS says, you put a fitting on there and "bleed" that vapor to the atmosphere in order to fill the tank. I hope this helps. Thanks, Steve Norwood, Texarkana,Texas.

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