|Nominal Bore||Working Pressure (Bar)|
The working pressures given here are for ambient temperatures using elastomeric seals (see table above). Higher temperatures and/or PTFE seals will reduce the pressure rating of the coupling.
In the case of polypropylene the maximum working temperature is 70°C (158°F). At this temperature, the working pressures above must be reduced by 40%.
Historically the standard for cam action couplings has been based on the US Military Specification MIL-C-27487 (Coupling Halves, Quick-Disconnect, Cam-Locking Type).
The specification laid down the casting method, materials, dimensions, tolerances, pressure ratings and inspection procedures.
The MIL-C-27487 specification guaranteed inter-changeability of products. MIL-C-27487 has now been declared obsolete, and replaced by a new US Federal standard A-A-59326.
Actual product may differ from image shown.