Type 80 Iso-Ring

With the Ashcroft® isolation ring, the instrument is in contact with the fill fluid, not directly with the process flow.  Clogging or fouling is never a problem.  The Iso-Ring has a flexible inner cylinder, behind which is the fill fluid.  As process liquid flows through the pipe, it exerts pressure.  The pressure exerted by the fill fluid is then monitored by the instrument-sensing element.  A 360-degree flexible cylinder means no plugging, assuring reliable and accurate pressure readings.  A built-in threaded needle valve is provided as standard.  This permits the removal of a pressure instrument for calibration, repair, or replacement without shutting down the process flow.

Adaptable to a variety of process conditions and applications, the Ashcroft® Iso-Ring can be used for protection of instrumentation such as pressure gauges, switches, transmitters, recorders and transducers.  The Iso-Ring fits between customer-supplied piping flanges like many butterfly valves, and is available for piping diameters from 2" to 20".  It can be used at any pressure within the limitations of ASME classes 150 and 300, and even in most vacuum applications.

Ashcroft® Type 85 and 86 Iso-Spools are used for small-diameter piping.  Designed to provide a large sensing area in the smaller pipe diameters from 1" to 2", the patented Iso-Spool is offered in either NPT threaded or flanged models.  Type 86 is available with flat or raised-face flanges.       


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