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Calculating Pressure needed to lift dump valve assembly

Calculating Pressure needed to lift dump valve assembly

Calculating Pressure needed to lift dump valve assembly

(OP)
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)
 

RE: Calculating Pressure needed to lift dump valve assembly

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.

RE: Calculating Pressure needed to lift dump valve assembly

(OP)
It is acting against the assembly.

The pressure of the vessel is at 1440 psi.  

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