Chlorobutyl Rubber Bellows Flexible Connectors
EMFLEX chlorobutyl (often shor
tened to butyl) rubbe
r
flexible connectors are comprised of a synthetic rubbe
r
membrane reinforced
with nylon. The collars are wire
reinforced and the unit is complete with carbon steel
flanges. They are capable of absorbing movement in
several directions; axial compression, axial elongation
and lateral deflection. A small amount of angula
r
movement may also be allowed. They are normally
installed in the pipework to isolate various items of plant
which produce noise and vibration. These flexible
connectors effectively dampen the transmission of sound
and vibration from plant items in building services
installations.
Type BB Untied
Chlorobutyl rubber membrane reinforced with a nylon
textile cord and fitted with untied (circular) zinc plated
carbon steel flanges. Suitable for use on hot water and
chilled water under 4 bar unless the pipework is
secured.
Design Consideration:
Rubber flexible connectors are subjected to the same
internal pressure force
as metal expansion joints and that
the same force is equal to the internal pressure multiplied
by the maximum internal area. This force causes the
connector to lengthen and tied units are recommended
where the working pressure exceeds 4 bar, unless the
pipework is secured to restrict movement.
T
ie rods are fitted through oval flanges and to isolate the
tie-rods from the special neoprene top hat washers are
used to prevent any metal to metal contact whatsoever,
effectively preventing noise transmission.
After Installation of TIED UNITS the tie-rod nuts should be
checked to have 1mm clearance over the steel washers.
When using with items of plant mounted on vibration
isolators, such as springs or inertia bases, then TIED units
must be installed.
Working Pressure:
4 bar (400kPA) for untied units, unless pipe is secured.
10 bar (1000kPA) for tied units with top hat washers.
16 bar (1600kPA) PLEASE CONTACT OUR OFFICES.
Test Pressure: 1.5 x Working Pressure
Working Temperature: -10°C to 95°C
Key Features:
Fully traceable and has the date of manufacture,
nominal diameter, manufacturer, and type permanently
moulded into the membrane.
Noise and vibration reduction capabilities.
All Tied units are fitted with noise absorbing top hat
washers.
Untied & Tied Unit
Untied Units Only Untied & Tied Unit
Nominal Bore
Installed Overall
Length
Axial Com
p
ression
Axial Elon
g
ation Lateral Deflection
mm mm mm mm mm
25 95 8 4 8
32 95 8 4 8
40 95 8 4 8
50 105 8 4 8
65 115 12 6 10
80 130 12 6 10
100 135 18 10 12
125 170 18 10 12
150 180 18 10 12
200 205 25 14 22
250 240 25 14 22
Chlorobutyl rubber membrane reinforced with a nylon
textile cord and fitted with tied (oval) zinc plated carbon
steel flanges complete with isolating tie bars. Suitable fo
r
use on hot water and chilled water under 10 bar.
Type
BB Tied
Distributor :
Interflex Hose & Bellows Ltd. • www.interflex.co.uk
Ludlow Eco Park • Ludlow • Shropshire • SY8 1FF • UK
Tel.: +44 (0)1584 878500 • Email: enquiries@interflex.co.uk
EMFLEX
