220 Isokinetic Samplings Systems

The Series 220 has major advantages over traditional sampling systems. The Series 220 incorporates the unique Kurz Axial Flow-Low Particle Loss sampling nozzle design, developed especially for the DWPF at Savannah River Site. Rather than use a single “shrouded nozzle” as suggested by ANSI N13.1-1999, we use our low-loss axial flow nozzles to achieve the same objective—lower particle loss. Kurz believes its’ approach is more realistic, as a single nozzle can “miss” accident conditions n which large particles penetrate the upstream HEPA filters at the seals or any other location.

The main difference between the operation of a single-point shrouded nozzle versus the Kurz Series 220 Multi-Point Sample Rakes, is that the shrouded nozzle is normally used with a manually controlled constant sample flow rate (which is questionable at low stack flows) and the Kurz Series 220 Multi-Point Sample Rakes are operated with the sample flow rate proportional to the stack flow rate, either by using the Kurz Automatic Flow Control System or manually controlled.