34
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Figure 20.
Modifying 300 psig (2068.4 kPaG) or 21 bar
flange adaptors for flat-faced flange application
Remove to mate
to flat-faced
flanges
Victaulic Gasket Installation
1. Inspect supplied gasket to be certain it is suited for
intended service (code identifies gasket grade).
Apply a thin coat of silicone lubricant to gasket tips
and outside of gasket.
2. Install gasket, placing gasket over pipe end and
making sure gasket lip does not overhang pipe end.
Refer to the following figure for gasket
configuration.
3. Align and bring two pipe ends together and slide
gasket into position centered between the grooves
on each pipe. No portion of the gasket should
extend into the groove on either pipe.
4. Open fully and place hinged Victaulic
®
flange
around the grooved pipe end with the circular key
section locating into the groove.
5. Insert a standard hex head screw through the
mating holes of the Victaulic
®
flange to secure the
flange firmly in the groove.
6. Tighten fasteners alternately and equally until
housing screw pads are firmly together (metal-to-
metal); refer to
“Screw-Tightening Sequence for
Water Piping Connections,” p. 35
. Do NOT
excessively tighten fasteners.
N
No
otte
e:: Uneven tightening may cause gasket to pinch.
Figure 21.
Typical Victaulic
®
®
flange gasket
configuration
Table 11.
Installation data for 150 psig (1034.2 kPaG) flange adapters (Style 741)
Nominal Pipe Size
Assembly Screw
Size
(a)
Number of
Assembly Screws
Required
Screw Pattern Diameter
Weight
in.
mm
in.
in.
mm
lb
kg
8
200
3/4 x 3-1/2
8
11.75
298
16.6
7.5
10
250
7/8 x 4
12
14.25
362
24.2
11
12
300
7/8 x 4
12
17
432
46.8
21.2
14
350
1 x 4-1/2
12
18.75
476
62
28.1
16
400
1 x 4-1/2
16
21.25
540
79
35.8
18
450
1-1/8 x 4-3/4
16
22.75
578
82.3
37.3
20
500
1-1/8 x 5-1/4
20
25
635
103.3
46.9
24
600
1-1/4 x 5-3/4
20
29.5
749
142
64.4
(a)
Screw size for conventional flange-to-flange connection. Longer screws are required when flange washer must be used.
Table 12.
Installation data for 300 psig (2068.4 kPaG) flange adapters (Style 743)
Nominal Pipe Size
Assembly Screw
Size
(a)
Number of Assembly
Screws Required
Screw Pattern Diameter
Weight
in.
mm
in.
in.
mm
lb
kg
8
219.1
3/4 x 4-3/4
12
13
330
34.3
15.6
10
273.0
1 x 5-1/4
16
15.25
387
48.3
21.9
12
323.9
1-1/8 x 5-3/4
16
17.75
451
70.5
32.0
(a)
Screw size for conventional flange-to-flange connection. Longer screws are required when flange washer must be used.
Summary of Contents for CVHH CenTraVac
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