F21 SERIES
The Kelco F21 Series flow switches are protected by a 12 month return to base warranty. Full details of
our warranty can be downloaded from: http://www.kelco.com.au/menu/information/warranty-statement/
PLEASE NOTE
: Kelco Engineering Pty Ltd reserves the right to change the specification of this product without notice. Kelco Engineering Pty Ltd accepts no liability for personal injury or economic loss
as a consequence of the use of this product. All rights reserved copyright Kelco Engineering Pty Ltd © 2012
The F21 flow switch can be used in hazardous areas. The flow
switch is classed as a simple device and does not contain
components capable of storing or producing an electric charge.
As a simple device the F21 can be used in hazardous
applications provided it is isolated by an intrinsically safe barrier,
a zener barrier.
The high compliance single pole double throw switch used in
the F21 flow switch is approved to the following international
standards: UL (File No. E32667), CSA (File No. LR21642) SEV
(File No. S20/163) and CE.
SWITCH
TYPE
CONTACT
SWITCHED
POWER
SWITCHED VOLTAGE
MAXIMUM
SWITCHED CURRENT
(RESISTIVE)
CARRY
CURRENT
BREAKDOWN
VOLTAGE
TYPICAL
APPLICATIONS
DRY CONTACT
REED SWITCH
S.P.D.T
BREAK
BEFORE
MAKE
20W / VA
MAXIMUM
140V AC
150V DC
1 AMP
MAXIMUM
2 AMP
MAXIMUM
200V MINIMUM
PLC, TELEMETRY &
GENERAL LOW
VOLTAGE CONTROL
APPLICATIONS
RATED
VOLTAGE
NON INDUCTIVE LOADS
INDUCTIVE LOADS
RESISTIVE
LOAD
LAMP LOAD
INDUCTIVE
LOAD
MOTOR LOAD
NO
NC
NO
NC
NO
NC
NO
NC
125 VAC
15A
3A
1.5A
15A
5A
2.5A
250 VAC
15A
2.5A
1.25A
15A
3A
1.5A
500 VAC
10A
1.5A
0.75A
6A
1.5A
0.75
8 VDC
15A
3A
1.5A
15A
5A
2.5A
14 VDC
15A
3A
1.5A
10A
5A
2.5A
30 VDC
6A
3A
1.5A
5A
5A
2.5A
125 VDC
0.5A
0.5A
0.25A
0.05A
0.05A
0.05A
250 VDC
0.5A
0.5A
0.25A
0.03A
0.03A
0.03A
ELECTRICAL DATA FOR STANDARD MICROSWITCH MODELS
The standard F21 flow switch is suitable for all general control circuit applications up to 500V AC. It is ideal for the control of pump
starters, relay logic circuits, and for the direct control of contactors and electronic timers.
ELECTRICAL DATA FOR REED SWITCH MODELS
The reed switch models are supplied with a high compliance single pole double throw reed switch suitable for all low wetting
current and low voltage applications. Such applications include PLC control, signalling in telemetry systems and relay logic circuits
Please note: the reed switch models are not suitable for use with inductive loads such as contactors or high wattage relays.
ELECTRICAL DATA
FLOW SENSITIVITY
The flow rates required to actuate the F21 will depend on many
variables such as turbulence, liquid viscosity and the exact
area of the paddle face exposed to the flow. For an accurate
estimate of the switch performance and to determine the effect
of paddle trimming, an online flow calculator is available at
www.kelco.com.au
HAZARDOUS APPLICATIONS
APPROVED STANDARDS
ORDERING
KELCO
Engineering Pty Ltd
ABN 20 002 834 844 Head office and factory:
9/9 Powells Road Brookvale NSW 2100 Australia
Postal Address: PO Box 496 Brookvale NSW 2100 Australia
Phone: +61 2 9905 6425 Fax: +61 2 9905 6420
Email: [email protected] Web: www.Kelco.com.au
©2012 Kelco Engineering Pty Ltd
MADE IN AUSTRALIA BY
Vendor Manual - Heavy Duty Flow Switch - Kelco - Model F21 - Installation Operation and Maintenance Manual
Q-Pulse Id: VM465
Active: 27/10/2014
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