displacer level

In what context?

Hi there,

If you looking for the sizing of displacers then this might help:

The displacer diameter sets the weight change of the displacer per level increment. The torque tube is designed to twist a fixed amount for each increment of buoyancy change. Therefore, in selecting the displacer diameter, the torque tube characteristics, the density of the process fuid, and the level span must be considered.

You will need to look at the technical documents for the actual device to confirm the actual numerical constants to use

You can use the following formulas though:

Volume=(Torque tube force)/(Delta SG)*(wt of i cubic inch H2O)

Diameter=((4V)/(piL))^1/2

Force (buoyant) = (0.36)*(SG)*(V)*(Lw)/L

Where SG - Specific gravity

V - Displacer volume in cubic inches

Lw - Working length of displacer in inches

L - Total length of displacer in inches

You should bear in mind that the displacers and chambers come in a fix range of sizes - these formulas are to help you select the correct size.

Regards

Craig

Hi,

A) First determine your level (HHLL-LLLL) EG 900 mm,

B) Decide your displacer length From the following to cover the entire measuring range in (A) + 20% additional lenth

1) 356

2) 813

3)1219

4) 1524

5) 1824

C) Select diplr length of 1219 mm

As mentioned in the previous post then determine your displr diameter

Note 1) Displacer length depends on the manufactuers std /EPC standard drawings

Regards

Jose