Metering Tubes Facilitate
Stable, Accurate
Readings
U Magnifier Lens in Front
Shields to Enhance
Reading Resolution
U Interchangeability of
Flow Tubes and Floats
U Ease of Installation and
Exchange of Flow Tube
U Simple Means of Panel
Mounting
2
Designed for direct read flow rates,
the FLD Series rotameter is a
precision instrument embodying the
inherent simplicity, versatility and
economy of the classical rotameter.
It is particularly suitable for metering
carrier gases in chromatography,
indicating and controlling gases in
manufacturing processes, liquid and
gas measurement in laboratories,
pilot plants, flow and level indicating,
etc. Shipped completely
assembled, flow meters include
standard mounting fittings in a
choice of materials, side plates,
thick protective magnifying front
shield and back plate, built-in control
valve, and flow tubes. Panel
FLDA3220ST, shown
smaller than actual size.
mounting style is convertible to
bench mounting through the use of
the optional acrylic tripod, FLTR-1.
The tripod has a built-in spirit leveler
and leveling screws.
Meters come with built-in 6 turn
needle valves, high precision
metering valves with “non-rising
stems” 16 turn, or with no valves.
The higher cost of the high
resolution valves is justified
whenever high sensitivity control
and resolution are desirable—
particularly in conjunction with metering tubes of very low flow rates.
Generally, for gas metering it is
recommended that valves are
B-25a
FLDA3419G,
shown smaller
than actual size.
positioned at inlets (bottom) for
liquids valves may be positioned
either at inlets or outlets (top).
For vacuum services, valves
must be mounted at outlets. If
unspecified at the time of ordering,
meters will be shipped with valves
mounted at the inlets.
Many fittings of various materials and styles are
available. Visit omega.com
To Order Visit omega.com/fld for Pricing and Details
Aluminum Frame 316 SS Frame
Air (65 mm) Air (65) mm Maximum
Standard Accuracy: ±5% of full scale (FS)
Repeatability: ±0.25%
Useful Flow Range: 10:1 minimum
Maximum Operating Pressure: 200 psig/13.8 bars
Maximum Operating Temperature: 121°C (250°F)
Construction
Flow Tubes: Heavy walled borosilicate glass
Floats: Glass, red sapphire, 316 stainless steel,
carboloy and tantalum
Choice of Mounting Fittings in Contact with Fluids:
Aluminum, black anodized or 316 stainless steel
Side Panels: Aluminum, black anodized
Front Shield: Polycarbonate resin with longitudinal
magnifier lens for enhanced reading resolution
Back Plate:
O-Rings and Packing: Buna O-rings in aluminum/brass
model. FKM O-rings in stainless steel meters
Optional: Perfluoroelastomer and EPR
Connections:
1
⁄8" thick white acrylics
1
⁄8 NPT female inlet and outlet connections
Dimensions: mm (inch)
Panel Mount Installation
Center
(4.50)
41.40
(1.63)
open
28.6
(1.13)
Line
65
150
(8.93)
12.7
(0.50)
13.49
(0.53)
9.5 (3/8) maximum
panel thickness
16
(5/8)
(5/8)
16
Dimensions show rotameter
Dimensions show rotameter
side view.Face width (not
side view. Face width (not
shown) is 32 mm (1.25").Use
shown) is 32 mm (1.25"). Use
center line dimensions for
center line dimensions for
drilling panel.
drilling panel.
To OrderVisit omega.com/fld for Pricing and Details
Aluminum Frame 316 SS Frame
Water (65 mm) Water (65 mm) Maximum
Model No. Model No. Flow Units