Wallace &
Tiernan Glass Tube Rotameters
These
rotameters have a wide range of capacities and tube sizes. Metering
accuracy is 2% of full scale (1% with custom calibration) over a 10:1
range (see page 2 for pressure and temperature limits.) Beaded-guide tubes
are available with 5- or 10-inch scales. End fittings for vertical and
horizontal connections come in both threaded and flanged types. Choice of
such wetted parts materials as brass, carbon steel, 316 stainless, PVC,
TFE, KynarŽ, Buna-N, VitonŽ, and EPR give a good balance between cost and
maximum corrosion resistance.
See Material Selection Guide.
One-piece
Frame
Varea-Meter frames are welded, heavy gauge 302
stainless steel. This one piece, deep-formed frame protects the tube from
pipe strains, makes for design simplicity, minimizes parts, easy assembly.
Front and rear tube shields are standard.
Positive,
Convenient Tube Sealing
An external
clamp exerts a firm force on a tube retainer. There is no packing, no
spring in the flow stream. Tubes are held securely, yet are easily
removed. Tubes and retainers are sealed by same-size O-rings.
Float
Design Increases Capacity
Varea-Meter
floats have their metering discs between the upper and lower bodies. The
short lower body results in less flow restriction and less pressure drop
than with conventional floats. Along with high-taper tubes, these floats
give higher capacities for a given tube size. Thus, it is often possible
to select a smaller Varea-Meter at a saving in cost.
