Calculating Pressure needed to lift dump valve assembly

[spb2010]

Hello everyone,

I work for a manufacturing firm that designs oilfield equipment. I have the following question.

I am to find the length of a propane fluid column needed to lift a dump valve assembly that weighs 62.4 lbs.

I was given the following information to work with:
Propane Liquid
density of liquid propane = 4.23 lb/gal
Dfloat assembly = 10 inches (hollow on the inside)
Dvessel = 24 inches

I was given no length of either the vessel or the float tube assembly.

Is this a solvable question given the data and how would one go about to solve it. I assumed standard wall thickness for a 10" diameter pipe (.365 in)

 

[ash9144]

Is the 62 lbs of the dump valve the weight against the float? Or just the entire assembly?

If acting against the float then it is 62.4 lbs/area of 10" float to obtain pounds/sq in.

Then use density of propane and calculated pressure in eq P=dens*g*h to calculate h.

However more importantly is what kind of pressure is on the vessel to maintain your C3 liquid.

 

[spb2010]

It is acting against the assembly.

The pressure of the vessel is at 1440 psi.