Isolation Rings & Gauging Products

OPW's patented Gauge Isolation Ring, called ISO-Ring®, is designed to isolate gauges or pressure switches from solids in process flow and to ensure accurate pressure readings. 
Why ISO-Ring? Clogging or fouling typically associated with diaphragm seals used in viscous fluid applications result in erroneous pressure readings. This is never a problem with the OPW ISO-Ring®. 
ISO-Ring® utilizes a specially designed flush-mounted flexible inner cylinder, behind which is a clean, captive liquid. As process liquid flows through the pipe, it exerts pressure through the flexible cylinder to the captive liquid.

Pressure is monitored by the gauge or the switch, which is completely isolated from the process flow. 

  • Insure smooth and uninterrupted process flow
  • Will not clog!
  • Replaces traditional diaphragm seals, which have a tendency to clog
Why Iso-Rings?
Direct  Diaphragm Seal  ISO-Ring® 

ISO-Rings
Installed in-between flanges 
From 1” to 20” sizes


Iso-Spool
Threaded or Flanged versions 
From 1” to 4” sizes 
NPT threaded and flanged models available