Gems Sensors & Controls RFI Specifications
(34.8 mm)
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Visual Indicators – RFI Types
This is RotorFlow in its most basic form — a bright orange rotor turning with
fluid flow. Simple, direct and reliable. Flow rate is estimated, or simply confirmed,
by viewing the speed of the turning rotor. Either port may be used for incoming flow,
and bayonet mounting lens is easily removed for quick cleanout. RFI Type RotorFlow
sensors are easy to see, easy to install and easy to afford.
Typical Applications
• Visual flow confirmation on heat exchangers • Plastic injection molding equipment
Specifications
Wetted Materials
Body Brass, 316 Stainless Steel or Polypropylene
(Hydrolytically Stable, Glass Reinforced)
Rotor Pin Ceramic
Rotor High Visibility Orange, Molded Nylon
Lens Polysulfone
O-Ring Viton® (Brass Body); Buna N (Polypropylene Body)
Low Flow Adaptor Glass Reinforced Polypropylene
Operating Pressure,
Brass or Stainless Steel Body 100 PSIG (7 bar) @212°F (100°C)
200 PSIG (13.8 bar) Max. @ 70°F (21°C)
Polypropylene Body 100 PSIG (6.9 bar) at 70°F (21°C),
40 PSI (2.8 bar) Max. @ 180°F (82°C)
Operating Temperature,
Brass or Stainless Steel Body -20°F to 212°F (-29°C to 100°C)
Polypropylene Body -20°F to 180°F (-29°C to 82°C)
Operating Principle
1. As liquid passes through the RotorFlow body, the rotor spins at a rate proportional
to flow.
2.
RotorFlow Indicators may be mounted with flow entering either port. At low flow
rates, performance is optimized by positioning ports at the top of the unit, in a
horizontal plane.
How To Order
Specify Part Number based on desired body material and port size.
Body
Material
Polypropylene
Port Size
NPT
.25˝ 0.1 to 1.0 0.5 to 5.0
.50˝ 1.5 to 12.0 4.0 to 20.0
.25˝ 0.1 to 1.0 0.5 to 5.0
Brass
.50˝ 1.5 to 12.0 4.0 to 20.0
.75˝ — 5.0 to 30.0
1.00˝ — 8.0 to 60.0
9/16˝ - 18** 0.1 to 1.0 0.5 to 5.0
Stainless
Steel
.50˝ 1.5 to 12.0 4.0 to 20.0
.75˝ — 5.0 to 30.0
1.00˝ — 8.0 to 60.0
* With use of Low Flow Adapter supplied. See Page F-8 for more information.
** Straight thread with O-ring seal.
– Stock Items.
Flow Ranges – GPM
Low* Range Standard Range
Part Number
155420
155480
142541
142542
180392
181681
174596
173138
181682
181683
RFA/RFI TYPES
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Dimensions
Polypropylene Bodies
.64˝ (16.3 mm)
2.50˝ (63.5 mm)
3.06˝ (77.7 mm)
Brass and Stainless Steel Bodies - .25˝ and .50˝ Ports
2.50˝ (63.5 mm)
3.01˝ (76.4 mm)
Brass Body – .75˝ and 1.00˝ Ports
2.50˝
(63.5 mm)
3.94˝
(100 mm)
High Visibility
Orange Rotor
Constructed of Molded Nylon
for good general purpose
compatibility with a wide range
of fluids. Offers high visibility.
.80˝ (20.3 mm) .30˝ (7.6 mm)
1.37˝ (34.8 mm)
.30˝ (7.6 mm)
1/4˝ PORTS =
80˝ (20.3 mm)
1/2˝ PORTS =
87˝ (22.1 mm)
(26.9 mm)
1.06˝
2˝
(50.8 mm)
1.37˝
FLOW SENSORS – ELECTRONIC
RFI-RotorFlow / p1of1 / 30-JUL-14
Visit www.GemsSensors.com for most current information.
F-7
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