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  1. hjzhawii

    Switching Valves for Adsorption Beds

    Can anyone comment on the effectiveness of Chromatic's HCV valves for switching valves application on a fixed bed adsorbent (TSA), specifically against the industry standard Orbit RSBV for these applications? Customer is insistent on Orbit valves, which is fine as it is their right. I'm just...
  2. hjzhawii

    Actual Physical Difference of Ex E vs Ex ia Junction Box

    Some supplier provides junction box certified Ex E or Ex ia. I know what Ex E or Ex ia means, in terms of the type of protection they offer for circuitries. However, I have never seen an actual Ex ia JB before, thus I'm wondering, what is the difference in actual physical construction of these...
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