General Design and Gland Dimensions

The PLUG DIAMETER (H) must be figured using the minimum clearance gap as given in Figure 20 and the maximum clearance gap as shown in Figure 22. The plug diameter can also be calculated by subtracting the minimum gap from the minimum bore giving the maximum plug diameter. The minimum plug diameter can be calculated by subtracting the maximum gap (see Figure 22) from the maximum bore dimension. By using this method, it allows the use of softer compounds without the possibilities of encountering extrusions.

STATIC FEMALE OR TUBE seals (Figure 24) are based upon the following:

Throat (Bore) Dimensions (E)
Tube Dimensions (c)
Groove Dimension (D)
Groove Width (G)
 

Maximum Radial Clearance Gap to Prevent Extrusion

Maximum Pressure PSI

"O" Ring Hardness (Shore A)
50 60 70 80 90

100
250
500

1,000
1,500
2,000
3,000
4,000
5,000

.008"

.005"
.003"

.001"
.000"

.009"
.008"
.005"

.003"
.001"
.000"

.010"
.009"
.008"

.005"
.003"
.002"
.000"

.013"
.012"
.010"

.008"
.005"
.004"
.002"
.000"

.016"
.014"
.012"

.010"
.008"
.005"
.003"
.001"
.000"

Figure 22

 

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