Mechanical SQUEEZE for the gland is determined by
the bore diameter and the groove diameter in a plug or male
type seal (Figure 20). The formula for determining the
groove diameter when the bore and gland depth are know is:
B min. = A max. minus 2 F max. F max. = A min. minus 2
F min. (F = Gland depth)
SQUEEZE is measured from the bottom of the groove to
the mating surface and in the case of radial seals includes
the clearance gap. The following formula is used to determine
the actual gland depth with tolerances: |
Max. Gland Depth = Max. groove diameter minus min. tube
diameter divided by 2 Min. Gland Depth = groove
diameter minus max. tube diameter divided by 2
TOTAL DIAMETRAL CLEARANCE is the difference between
the bore diameter and the plug diameter dimensions (Fig.
21). Tolerances of the bore and plug diameters determine
the maximum and minimum diametral clearance gap. These values
divided by two will give the radial maximum and minimum
clearance gaps. (Fig. 23).
|