IntroductionThis retrofit kit will allow the vacuum system to remain on in the event of an argon pressure loss. Thecurrent NexION loses vacuum when the argon pressure drops below 45 psig. If the current NexIONvacuum valves have less than 45 psig applied they will not function properly. The instrument will thenshut down and the vacuum will be lost.This retrofit upgrade kit has the components to replace the existing vacuum valve with an electricallyoperated vacuum valve which is independent of input Argon pressure. With this new valve assembly theinstrument will stay under vacuum even if the instrument loses house pressure.
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