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7707 Heavy Duty Flexible Coupling Download PDF



The Model 7707 Flexible Coupling is designed for use in a variety of general piping applications of moderate or high pressure services.  Working pressure is usually dictated by the wall thickness and rating of the pipe being used.  The Model 7707 couplings feature flexibility that can accommodate misalignment, distortion, thermal stress, vibration and noise and also resist seismic tremors.  The utilization of Model 7707 couplings can accommodate a curved layout.  See Typical Applications – Flexible Couplings on Shurjoint cutsheet #B-19.

The Model 7707 couplings are comprised of two housing segments, EPDM gaskets and plated track bolts and nuts. Housing segments are supplied with our standard painted finishes, i.e. orange or RAL3000 red.  Optional finishes such as hot dipped zinc galvanized and epoxy coatings are also available.

* Working Pressure is based on roll grooved standard wall carbon steel pipe.

† Allowable Axial Displacement and Angular Movement (deflection) figures are for roll grooved standard steel pipe.  Values for cut grooved pipe will be double that of roll grooved.  These values are maximums; for design and installation purposes these figures should be reduced by: 50% for ¾” – 3½”; 25% for 4” and larger to compensate for jobsite conditions.

** Deflection or angular movement given is the maximum value that a coupling allows. When using the given maximum angles for a curved layout, proper bracing should be used to counter pressure thrust that will occur when the system is pressurized. Flexible couplings can be used for angular movement and or thermal expansion, though please note individual coupling(s) cannot be used to their maximums for both types of movement within a system at the same time.

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