straub-flex - Glynwed

STRAUB-STEP-FLEX
The pipe connection for different pipe
diameters
STRAUB-STEP-FLEX overcomes large diameter differences
from 10 to 30mm. In order to protect the sealing
sleeve, a stainless steel strip insert is included.
Because of the differences in diameter, internal forces
(refer to the table of forces below) always press the
STRAUB-STEP-FLEX coupling towards the smaller
pipe diameter which therefore has to be prevented from
slipping by appropriate measures; a coupling retainer
is available on request. Such retainers are not required
for non-pressurised applications.
STRAUB-STEP-FLEX couplings are available in FLEX
2 or FLEX 3 widths.
• STEP-FLEX 2 from 250 up to 812.8 mm
(LS, LU, LV, H, XS)
• STEP-FLEX 3 from 914.4 up to 4064.0 mm
(LS, LV, H, X)
All STRAUB-STEP-FLEX specifications are identical to
those of the respective STRAUB-FLEX devices.
Type
Pipe 1
[mm]
Pipe 2
[mm]
PS max.
[bar]
Compensation of diameter differences when installing controls
and instruments
F2
Table of forces for coupling retainer → ← FR
F1
STRAUB-
STEP-
FLEX 2
STRAUB-
STEP-
FLEX 3
Coupling retainer
(FR at PS max.)
[N]
PS min.
[bar]
Coupling retainer
(FR at PS min.)
[N]
250.0 280.0 24.0 29960 12.0 14980
323.9 353.0 25.0 38860 9.5 14690
406.4 436.0 25.0 48940 7.5 14680
609.6 639.0 25.0 72040 5.0 14410
812.8 842.0 22.0 82938 3.5 13195
1219.2 1249.0 17.0 98160 3.5 20210
1600.0 1630.0 13.5 102690 2.5 19020
2032.0 2062.0 10.0 96410 2.0 19280
3048.0 3078.0 6.5 93770 3.0 43280
4064.0 4094.0 5.0 96060 1.0 19210
Intermediate values can be interpolated
Example for ordering:
STRAUB-STEP-FLEX 2LS 275 / 260 mm, EPDM/SS
STRAUB-STEP-FLEX 3H 1190 / 1120 mm, EPDM/GALV
←
FR = (F2 - F1)
Drawing STRAUB-STEP-FLEX 2
Technical Manual 2012/01 37