Proco Series 260R Molded Wide Arch Expansion Joints are specifically designed for use with Plastic or FRP Piping Systems. An option for the standard spool-type expansion joints, the PROCO Style 261R & Style 262R have lower spring forces to compress, extend or laterally offset. The PROCO Styles 261R & 262R can be used on plastic or FRP pipes, pumps, valves and tanks without fear of the expansion joint being stronger than the pipe, pump, valve or tank flanges. In addition the PROCO Styles 261R & 262R are designed for tough demanding applications, as found in: Chemical & Petrochemical, Pulp Paper, Process Facilities, Industrial Piping Pollution Control Systems. The PROCO Styles 261R & 262R may be used where metallic hoses/expansion joints or old design rubber expansion joints may have been specified previously. Used on plastic tanks, pumps, chillers, cooling towers, compressors, blowers, fans, absorption machines, etc to: (1) Absorb Pipe Movements/Stress, (2)Reduce System Noise, (3) Isolate Mechanical Vibrations, (4) Compensate Alignment/Offset, (5) Eliminate Electrolytic Action and Electrolysis, (6) Protect Against Start-Up/Surge Forces.