RFS-2500 Series
RotorFlow® Sensors
(For Additional Information, See Gems' "Level, Flow and Pressure Catalog)
RotorFlow units monitor dynamic fluid flow. The rotor reacts to
turbulence, pulsation, entrained air, and other flow anomalies induced in
the flow stream by other process hardware. For optimum performance,
install RotorFlow units where nominal flow conditions exist, with ports
located at the top. Incoming flow may be placed to either port. A
minimum of 8" of straight pipe on the inlet side is recommended.
Low Flow Applications
Instruction Bulletin No.
157261
Rev. G
A low flow adapter is supplied with all RotorFlow units. It is used to produce accurate response at low flow rates. Press fit the
adapter as shown above, in the port selected for incoming flow.
Body
Material
Polypropylene
Brass
Port Size
NPT
.25"
.50"
.25"
.50"
.75"
1.0"
Input
Power
12 VDC 155424
24 VDC 155425
110 VAC 155876
12 VDC 155484
110 VAC 155886
12 VDC 156264
110 VAC 156266
12 VDC 156267
24 VDC 156268
110 VAC 156269
12 VDC 180394
24 VDC 180395
110 VAC 180396
24 VDC 181688
115 VAC 181689
Part
Number
See Flow Range Chart below.
Flow Range-GPM
Standard
Range
0.5 - 5.0 0.1 - 1.0 152147
4.0 - 20.0 1.5 - 12.0 151832 24 VDC 155485
0.5 - 5.0 0.1 - 1.0 152147 24 VDC 156265
4.0 - 20.0 1.5 - 12.0 151832
5.0 - 30.0 N/A N/A
8.0 - 60.0 N/A N/A
Range
Low Flow*
Adapter
Part Number
*
With use of low flow
adapter supplied
9/16”-18**
.50”
316 Stainless
Steel
.75”
1.0”
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24 VDC 165073
110 VAC 165074
24 VDC 165077
110 VAC 165078
24 VDC
115 VAC 181692
24 VDC 181693
115 VAC 181694
181691
0.5 - 5.0 0.1 to 1.0 152147
4.0 to 20.0 1.5 to 12.0 151832
5.0 - 30.0 N/A N/A
8.0 - 60.0 N/A N/A
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**
Straight thread with O-
ring seal
Installation:
provided to assist with installation for a leak-free seal, without damage to the unit: 1) Apply pipe thread sealant to male
pipe threads. 2) Thread RotorFlow unit onto male pipe thread until hang-tight . 3) Tighten pipe 1 to 1/2 additional turns.
4) If improper seal results, continue turning pipe into unit in 1/4 turn increments.
Recommended pipe Sealants:
(a) Permatex
Filtration and Cleaning:
RotorFlow sensor, accumulation is easily cleared by removing the lens from the body. The lens is removed by turning
its center rib 45°C counter-clockwise and then pulling it out. To reinstall the lens, simply reverse the process.
Pressure must be relieved
RotorFlow sensors connect to piping via NPT mating threads forms. The following guidelines are
Do not exceed one additional turn.
® “
No More Leaks” (b) Teflon® Thread Tape.
150 micron filtration is recommended.
from the system prior to sensor clean-out.
However, should foreign particles enter the
Panel Mounting
Any RotorFlow sensor may be panel mounted using holes integrated into the bodies.
Plastic Bodies
Two (2) mounting ears are provided at the body centerline to receive #8 Self- tapping screws.
ies use 8-32 UNC2B screws.).
(
Brass and stainless steel bod-
See recommended panel preparation diagram.
They may be replaced with standard machine screws if reinstallation should be required.
: ANSI T Type 23 self-tapping screws are recommended for plastic.
Note
Plastic, Brass , Stainless Steel Brass/Stainless Steel
1/4”, 1/2”, 9/16”-18 3/4” & 1”
Note
A RotorFlow Repair Kit is available, including the following replacement
parts: lens, O-ring, shaft, and rotor. Consult Factory to order.
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Switch Set Point Calibration with LED Signal
With the unit installed in the line and power supplied, complete the following steps to calibrate switch actuation point with
proper flow rate. A small flat-blade screwdriver is all that is required.
1. Adjust liquid flow in the line to the
rate at which actuation is desired.
2. Insert screwdriver into opening on
backside of housing and fit blade into
the potentiometer adjustment screw
inside.
3. If LED is not illuminated, slowly turn
screwdriver counter-clockwise and
stop as soon as LED illuminates.
4. If LED is illuminated, turn screwdriver
clockwise until LED light goes out.
Then, slowly turn screwdriver
counter-clockwise and stop as soon
as LED illuminates.
Specifications
Wetted Materials
Body
Rotor Pin
Rotor
Lens
O-Ring
Operating Pressure, Max. Brass
Body & 316 SS Body
Polypropylene Body
Operating Temperature, Max.
Brass Body
Polypropylene Body
316 SS Body
Electronics (All Bodies)
Viscosity, Max.
Input Power
Relay Contact Ratings (SPDT)
Repeatability
Set Point Accuracy (Factory Set)
Set Point Differential
Electrical Termination
Brass, 316 SS or Polypropylene, Hydrolytically Stable, Glass-Reinforced
Ceramic
PPS Composite/Teflon/PPS Composite
Polysulfone
Buna N/Viton
200 PSIG @ 70°F 80 PSIG @ 212°F
100 PSIG @ 70°F 40 PSIG @ 212°F
212°F (100°C)
180°F (82.2°C)
212°F (100°C)
150°F (65.5°C)
200 SSU
12 VDC, 24 VDC or 110 VAC
1 Amp, 24 VDC Resistive 0.3 Amp, 110 VAC
2% Maximum Deviation
±5%
15% Maximum
22 AWG PVC-Jacketed, 24" Cable. Color codes: Red = +VAC/VDC;
†
Black = Ground; White = N.O. Contact; Brown = N.C. Contact; Green = Common.
†
Hydrolytically stable, glass-reinforced, Polypropylene is UL-recognized to UL746B at a
relative temperature index of 65°C
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Electrical Data
Input power and output are connected via a
Multi-conductor, PVC-jacketed 24” cable.
Color codes are as shown below:
+VAC/VDC Red
-Power Black
N.O. Contact White
N.C. Contact Brown
Common Green
This product is suitable for Class I and Class II applications only, per the requirements of standard EN60730 and any additional specific
requirements for a particular application or medium being sensed. Class I compliance of metal bodied units requires a ground
connection between the metal body and the earthing system of the installation. Class I compliance of plastic bodied units in contact
with a conductive medium requires that the medium be effectively earthed so as to provide an earthed barrier between the unit and
accessible areas. For Class III compliance, a supply at safety extra-low voltage (SELV) must be provided. Please consult the Factory
for compliance information on specific part numbers.
WARNING
When determining chemical compatibility of
materials of construction, the flow media and
application-associated environmental conditions
should be carefully considered.
Important Points!
Product must be maintained and installed in strict
accordance with the National Electrical Code and GEMS
product catalog and instruction bulletin. Failure to observe
this warning could result in serious injuries or damages.
Pressure and temperature limitations shown on individual
catalog pages and drawings for the specified flow
switches must not be exceeded. These pressures and
temperatures take into consideration possible system
surge pressures/temperatures and their frequencies
election of materials for compatibility with the media is
S
critical to the life and operation of GEMS flow switches.
Take care in the proper selection of materials of
construction; particularly wetted materials.
Life expectancy of switch contacts varies with
applications. Contact GEMS if life cycle testing is
required.
.
Ambient temperature changes do affect switch set
points, since the specific gravity of a liquid can vary
with temperature.
Flow switches have been designed to resist shock and
vibration; however, shock and vibration should be
minimized.
Liquid media containing particulate and/or debris
should be filtered to ensure proper operation of
GEMS products.
Electrical entries and mounting points may require
liquid/vapor sealing if located in an enclosed tank.
Flow switches must not be field repaired.
Physical damaged sustained by the product may
render it unserviceable.
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