A powerful fan system moves air past the object; the fan must have straightening vanes
to smooth the airflow.
Additionally, content was added for launchers and receivers, strainers, orifice plates, straightening vanes
, valve extensions and operators, and various coatings, linings, and weightings.
These special lances are designed to negotiate the internal straightening vanes
all the way to the orifice plate (measuring device) at the meter's center.
areas of short-circuiting and dead zones), specifically the straightening vanes included to reduce dead zones around each 180-degree channel bend.
Simulations performed with and without the straightening vanes revealed that their inclusion did not improve residence time.
Close running clearance rotor-to-casing and straightening vanes
Tube bundle straightening vanes have been around for a long time.
These options were the choice whether to use straightening vanes or not.
This can be accomplished by using straightening vanes
and filters/strainers in the upstream piping.
Also included on the meter run were the temperature and pressure transmitters, a strainer with Dp switch, straightening vanes
, an on-line meter lubricator, a load-limiting orifice and a welded double-valve bypass.
Straightening vanes are to be set ahead of five nominal pipe diameters upstream of the meter inlet.
For those meters having internal straightening vanes, swirl direction at the rotor inlet can be different from swift direction at the meter inlet.