How to calculate the thickness of the dry gas seal adjustment shim

Are there any drawings? Which specific location’s gasket?

Are you referring to the clearance between the rotor, the gland, and the housing?

It’s not the gap between the gland and the housing; for natural gas compressors, it is necessary to adjust the dry gas seal to the appropriate position.

A natural gas compressor is used to adjust the dry gas seal to the appropriate position.

Before removing it, you need to determine the positioning of the sealing installation points – for example, the position of the mounting plate relative to the shaft shoulder, and the position of the outer end face of the seal relative to the shaft shoulder. When reinstalling it, just follow these positions

For example, there is a document available online that contains some measurement data: Project, Measurement Data – Distance between the end face of the dry gas seal and the end face of the sealing chamber: 151.00 mm; Distance between the end face of the dry gas seal mounting/dismounting plate and the end face of the sealing chamber: 120.90 mm; Distance between the end face of the dry gas seal mounting/dismounting tool and the end face of the sealing chamber: 106.10 mm

For new units, there is no reference point – to what extent should the dry gas seal be compressed to be considered normal?

For new units, this problem does indeed exist. We use compressors from Cameroon, and regarding the position to which the rotating ring should be pressed, it is specified as follows: “Size rotor shim: seat the inner ring of the seal against the pinion shoulder and measure the length ‘B’. (From the bottom of the rotor shim seat to the pinion face). The thickness of the shim should be set as follows: STG 1: (‘T’ + ‘B’ – 0.014) ± 0.005” “To adjust the size of the rotor shim, place the inner ring of the seal against the pinion shoulder and measure the length ‘B’.” (Bottom of the rotor gasket seat to the pinion surface). Peel the gasket to the following thickness: STG 1: (“T” + “B” –). 014) ±.005” inner ring likely refers to the moving ring; this ring is pressed against the shaft shoulder of the pinion, and then length B is measured. It seems that the moving ring is supposed to be pressed all the way down, but in that case there would be no compression in the spring. So indeed this is a problem with new units, and I’m not quite sure how to determine the thickness

To understand this, one must have a certain foundation first

I still haven’t figured out how to determine it for new units