Propane overfill by a "professional"

wa8yxm wrote:

westend wrote:
The fill valve is built to allow the displaced air to exit the tank slowly. The over-pressure relief valve opens instantaneously and it is not slow. When they open there is a release of liquid propane and is it not a small release.

One question westland.. You say "The fill valve is built to allow the displaced air..

HOW DID THE AIR GET IN THE TANK?

During the initial fill the tank is purged, all air is exhausted into a storage tank from which the propane that gets out with it is recovered later.. There is no air in the tank to displace it is all propane.

The valve you are speaking of is the liquid overfill indicator valve (long form) when it starts shooting WHITE, meaning frost by the way (condensed and frozen water vapor from the air around it on the OUTSIDE of the tank) the tank is full.

THIS is the proper way to fill a tank, not weight, not till the valve closes, but till the spitter spits.

On page 5:

Chris Bryant wrote:

westend wrote:

The fill valve is built to allow the displaced air to exit the tank slowly.


Not exactly correct- there should be no air in the cylinder to be displaced- the cylinder should be urged, and contain no air at all.
Sorry, you're right, I should have said "gas".

And, no, I was not referencing the fill bleed valve when referencing fast discharge. I was speaking of the emergency pressure relief valve that will discharge should the pressure in the tank rise above it's set point.