Crux 'Heavy Duty' Diaphragm Closures, as required for the
provision of auxiliary buoyancy purposes, are made from rubber reinforced with
polyester fabric. Fixing is achieved by clamping a solid nylon core, around
which the laminations of polyester fabric are wrapped between two machined
flanges.
The required Diaphragm strength for specified application is achieved by
provision of appropriate fabric strength and number of plies.
Crux 'Heavy Duty' Diaphragms are unique in that they are manufactured with one
side of the Diaphragm flat. The Diaphragm is then deformed to fit into the
fixing grooves within the flanges by torquing the fixing bolts. This forced
deformation of the Diaphragm ensures that a seal is obtained, even at early
stages of bolt torquing. Tolerance to flange distortion resulting from welding
is much better than with other competitor diaphragms.
Flanges are constructed from steel material EN10025 Grade S275 (ASTM A36) or
equivalent. High strength steel can be used where strength requirement or
client specification dictates. All bolts and nuts used are zinc plated
according to BS 3692 Grade 8.8.
|
PILE SIZE
in inches |
DIMENSIONS in
mm
|
BOLT SIZES (mm)
and number |
||
|
A
|
B
|
C
|
||
|
24
|
865
|
660
|
66
|
16 x 16
|
|
30
|
1184
|
980
|
66
|
20 x 16
|
|
36
|
1344
|
1130
|
70
|
24 x 16
|
|
42
|
1504
|
1290
|
70
|
24 x 16
|
|
48
|
1656
|
1432
|
80
|
30 x 16
|
|
54
|
1838
|
1614
|
80
|
30 x 16
|
|
60
|
2030
|
1806
|
80
|
36 x 20
|
|
66
|
2194
|
1928
|
100
|
36 x 20
|
|
72
|
2314
|
2070
|
100
|
42 x 20
|
|
84
|
2564
|
2320
|
100
|
42 x 25
|
