Profile: Addison Instrumentation supplies needle valves, manifolds, tube fittings and pipe fittings. Our valves and fittings are designed for performance under pressure with instrumentation application in petrochemical, refineries, power station, oil & gas, laboratories and research industries. Our instrument valve manifolds are constructed in any machineable metals including brass, nickel, monel, inconel, titanium, hastelloy and other exotic alloys.