Obtaining accurate pressure readings on slurry lines is difficult because slurries, abrasives and solids clog pressure elements such as gauges, switches and transmitters.
Isolator rings consist of a rubber "inner tube" captured in a steel ring. The assembly is installed between flanges in the process pipe. Clear instrument oil behind the rubber membrane transmits pressure to the gauge. The inside diameter of the ring assembly matches the adjacent pipe so the ring is continually cleaned by the motion of the process fluid.
