Gems Sensors & Controls RFS Operating Manual

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

316 Stainless

Steel

9/16”-18**

.50”

.75”

1.0”

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

**

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.