Description
Flow nozzles are particularly suited to high velocities and temperatures often encountered in steam flow. They are inherently more expensive to manufacture than a standard orifice plate, but are dimensionally more stable and give longer life at the higher velocities. The pressure loss is similar to an orifice plate, sized for the same flow conditions, but its longevity gives a distinct advantage as downtime due to maintenance is greatly reduced. There are 3 main styles of flow nozzle; ASME long radius nozzle, ISA 1932 nozzle and the venturi nozzle. AVCO supplies the flow nozzles as a single item, normally flanged, or pre-installed in a flanged spool piece with pressure taps added in the correct locations. The spool piece gives the end user peace of mind as all tolerances, alignments and pressure tap locations have been precisely controlled to ensure high degrees of accuracy. The attached piping accuracy beyond the spool piece is less critical provided minimum straight lengths have been followed, thereby leading to easier installation on site. The flow nozzles meet all relevant industry standards such as ASME MFC-3M & ISO 5167.
