The PosiFlex expansion joint from the Posiflex division of Crane accommodates all types of movement in the pipes to which it is connected - axial (expansion/contraction), lateral, angular, torsional, and vibration - simultaneously and without embrittlement or fatigue. It absorbs large pipe movements with minimal face to face dimensions, and provides strength in pressure and vacuum applications across the spread of industries.
This inherent flexibility means that fewer expansion joints are needed, and their low spring rates reduce the stress on the pipework system - features that together give a high degree of predictability and consistency, enabling piping and stress engineers to anticipate movement and design accordingly.
The PosiFlex elastomeric expansion joint is a full-bore product that allows unobstructed flow of the medium and reduces cavitation and turbulence. Easy-to-install segmented retaining rings enable full flange face sealing that is maintained under all movement conditions. In addition to compensating for movement, the PosiFlex joint provides an effective means of reducing noise or vibration. And unlike predominantly metal devices such as metal expansion bellows, it also resists corrosion and erosion.
Expansion joints can be manufactured from seven different rubber compounds to accommodate the needs of pipe systems for various media. The range of elastomers includes EPDM, neoprene, chlorobutyl, nitrile, Viton, Hypalon and natural rubber.
Sizes from DN40 to DN3600 are supplied, with flanges to all widely used specifications, including PN, DIN, ANSI, and AWWA. PosiFlex expansion joints are designed and manufactured to the Fluid Sealing Association standard under quality control management systems certified to BS EN ISO 9001:2000.
