straub-flex - Glynwed

Accessories
Strip inserts
Strip inserts protect the sealing sleeve against mechanical or chemical damage in the pipe end area. Strip inserts
are required for:
• Excessive distance between pipe ends • External pressure (e.g. underwater pipeline)
• Axial movement (expansion, contraction) • High temperature
• Angular deflection and axial misalignment • Fuel and combustibles
• Vacuum (e.g. suction line) • Swelling of the rubber caused by contact with chemicals
Subsequent installation of strip inserts for all types
of couplings is possible. Strip insert quality depends
on the medium and temperature. Plastic strip inserts
will have to be applied for normal temperatures and
chemicals, steel strip inserts for higher temperatures,
vacuum and external pressure. Also, a combination
of plastic and steel strip inserts is possible. T-profile
inserts prevent drifting of the coupling from its centre
position, if excessive axial movement and dynamic
alternating stress occurs.
Coupling Stainless steel Plastic T-Profile
Type / Size
AISI 316 L AISI 301 PVDF HDPE PVDF HDPE
STRAUB-FLEX 1 / OPEN-FLEX 1 x x x (from 76.1 mm)
STRAUB-FLEX 2 / OPEN-FLEX 2 x x x
STRAUB-FLEX 3 / OPEN-FLEX 3 x x x
STRAUB-FLEX 3.5 / OPEN-FLEX 3.5 x x
STRAUB-FLEX 4 / OPEN-FLEX 4 x x
STRAUB-METAL-GRIP x x
STRAUB-GRIP-L
26.9 - 168.3 mm x x
180.0 - 609.6 mm x x
STRAUB-ECO-GRIP x
STRAUB-PLAST / COMBI-GRIP x x
Strip insert
Technical Manual 2012/01 43