Size: Sircom

In most seal catalogs (specifically API 682 standards), sircom size is correlated to the "stationary face A-dimension." This is the axial length from the back of the ring to the seal face. Measure this using a depth gauge.

The inside and outside diameters of the sircom ring determine the hydraulic balance ratio of the seal. If the sircom size is too large (OD too big relative to ID), the seal becomes "unbalanced," leading to excessive heat generation and rapid face wear. If it is too small, the seal will not stay closed, leading to immediate leakage.

If you can clarify, I’d love to write you a custom story. For now, here’s a short imaginative tale based on "circumference size" — hope you enjoy!

When measuring yourself to find your Sirco (or "sircom") size, always measure over your undergarments, not over clothing.

Measuring sircom size is not a job for a standard plastic caliper. Because silicon carbide is extremely hard (second only to diamond) but also brittle, you cannot compress or "eyeball" these dimensions. Here is the professional workflow for determining sircom size:

If you are referring to the medical procedure or a state of being, the correct spelling is (verb) or circumcised (adjective).