Product category:
Materials and components
News Release from: Victrex USA | Subject: Victrex Peek film
Edited by the Engineeringtalk Editorial
Team on 14 December 2005
Film replaces PTFE when it gets too hot
When Circor encountered a sampling system with ambients up to 260C, it replaced the PTFE liner in a BP-3 pressure regulator with Victrex Peek film because of its high temperature capability.
When Circor Instrumentation Technologies, a provider of fluid process instrumentation technology, encountered a sampling system application with ambient temperatures up to 260C, it replaced the PTFE liner in a Go BP-3 series back pressure regulator with Victrex Peek film because of its high temperature capabilities Scott Tomlinson, Sales and Product Manager for Go Regulator, said: "For many sampling system applications, PTFE works very well as a diaphragm liner"
This article was originally published on Engineeringtalk on 1 Nov 2005 at 8.00am (UK)
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"We've used PTFE as our primary liner for over 30 years".
"Every once in a while, however, we run into an application where a little more chemical resistance and a little more temperature resistance are required".
In this application, with maximum temperatures up to 260C, the PTFE would migrate towards one of the internal ports of the back pressure regulator.
When this happened, flow was restricted through the unit.
Because Victrex Peek is a more rigid material and doesn't have a tendency to cold-flow or creep like PTFE, it has not migrated toward the internal port.
The liner is essentially a circular washer with a 4.38cm outside diameter and a 0.81cm inside diameter.
In this application, the media being used was a mixture of H2 and CO, and the working pressure was around 30bar.
The film is used as a barrier between sample process media and the backing of the diaphragm, which in this application is stainless steel.
The diaphragm is a wetted part inside the regulator that helps regulate pressure.
The regulators are used to maintain a constant pressure in an analyser.
These analysers are typically used to validate samples of process media that are being produced in refineries, chemical plants and other petrochemical and natural gas processing facilities.
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