CIRCOR Instrumentation Technologies chose VICTREX PEEK film for its superior high-temperature performance in the BP-3 Series GO Back Pressure Regulator, specifically designed for sampling systems operating at ambient temperatures up to 260°C (500°F). Previously, the regulator used a PTFE liner, but this material tended to deform or creep under prolonged exposure to heat, leading to potential performance issues. VICTREX PEEK, on the other hand, is a more durable and stable material that maintains its shape and integrity even under demanding conditions. It doesn’t migrate toward the internal valve port, making it an ideal choice for this application. CIRCOR employs a 10-mil thick VICTREX PEEK film within the diaphragm assembly, where it acts as a critical barrier between the process media and the backside of the diaphragm, which is made of stainless steel. The diaphragm is a key wetted component responsible for controlling pressure within the regulator. In this case, the system handles a gas mixture of hydrogen (H₂) and carbon monoxide (CO) at a working pressure of approximately 435 psi. The GO back pressure regulator is essential for maintaining consistent pressure in analytical instruments, which are commonly used in refineries, chemical plants, and other petrochemical and gas processing facilities. These environments demand reliable and long-lasting components due to the harsh operating conditions. In addition to its excellent resistance to high-temperature creep, VICTREX PEEK offers high purity and exceptional moisture and gas barrier properties, further enhancing its suitability for critical sampling applications.

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