F10 & F50
Flow Switches
DESCRIPTION
Magnetrol
®
flow switches are highly reliable devices
utilized to sense the start or stop of flow in horizontal
pipelines containing oil and petroleum derivatives,
chemicals, water, or air.
Vane-actuated Model F10 switches are used on gas or
liquid flow applications in 2" or larger line sizes.
Disc actuated Model F50 switches are in-line type used
for sensing clean liquids in 2" or smaller line sizes.
FEATURES
•
Actuation on increasing or decreasing flow
•
Special sensing elements for non-standard or high
flow applications
•
Designed for horizontal pipe applications
•
Available switch styles include dry contact,
hermetically sealed and pneumatic
Model
F10
Model F10
Model F50
APPLICATIONS
•
Pump staging or failure
•
Pipeline flow detection
•
Valve failure
•
Field adjustable
•
Low pressure drop
•
Process pressures to 1000 psig (69 bar)
•
Process temperatures to +450° F (+232° C)
•
Standard flow vanes for 2" thru 10" flow lines
•
Loss of pipeline flow
Model
F50
•
Pipe blockage/rupture
•
No calibration required
•
Bronze or stainless steel construction
•
Process pressures to 1150 psig (79.2 bar)
•
Process temperatures to +750° F (+399° C)
•
Alarm on eyewash or shower safety station
•
Bodies for flow lines from
3
⁄
4
" to 2"
•
Pump inlet flow protection
•
Check valve blockage/leakage
TECHNOLOGY
Model
F10
above the attraction sleeve. Turning the adjusting screw
clockwise increases the flow rate at which the switch
actuates. Adjustments can be made while the flow switch
is in service.
Flow through the horizontal pipeline causes the pivoted
vane assembly to swing in the direction of the flow. The
vane assembly lifts an attraction sleeve which in turn
causes the magnet to pull in and actuate the switch.
The O-ring sealed adjusting screw in the top of the
enclosing tube compresses the range spring located
Pivot
Return
spring
Adjusting
screw
Pivot
Swing out
position
Magnetic
sleeve
Return
Spring
Magnet
Actuating
vane
Model
F50
field of the permanent magnet, located outside the
enclosing tube, actuating the attached switch mechanism.
When the flow rate drops below the rate for which the
flow disc is calibrated, a reversal of this action occurs.
The rate of flow through the valve body raises or lowers
the disc. This in turn raises or lowers the magnetic sleeve
within its sealed non-magnetic enclosing tube. On an
increasing flow rate, the magnetic sleeve rises into the
Switch mechanism
Pivot
Return
spring
Enclosing
tube
(non-magnetic)
Sleeve
(magnetic)
Pivot
Magnet
Swing in
position
Return
Spring
Swing out
position
Flow disc
No-flow position
Position with actuating flow present
2
TYPICAL
APPLICATIONS
FLOW
Input line
Additive flow
Overflow detection
FLOW
Leak detection
Pump
protection
Overflow
tank
FLOW
Primary
tank
MODEL
20
F50
PRESSURE
DROP
20
ACROSS
SWITCH
Pressure
Drop (psi)
15
Pressure
Drop (psi)
0
50
100
150
200
15
10
10
5
5
0
Water
Flow
Rate
(GPM)
0
0
50
100
150
200
Water
Flow
Rate
(GPM)
Model F50 with
" NPT connection
Model F50 with
1"
NPT connection
20
20
Pressure
Drop (psi)
Pressure
Drop (psi)
15
15
10
10
5
5
0
0
50
100
150
200
Water
Flow
Rate
(GPM)
0
0
50
100
150
200
Water
Flow
Rate
(GPM)
Model F50 with
1
" NPT connection
Model F50 with
2"
NPT connection
3
SPECIFICATIONS
SWITCH
MECHANISMS
AND
ENCLOSURES
SWITCH ENCLOSURES
•
TYPE 4X/7/9 aluminum
enclosures
•
Designed to meet Class I, Div. 1,
Groups C & D and Class I,
Div. 1 Group B
•
Optional housing heaters and
drains available for some enclosures
•
Pneumatic switch mechanisms
available with a NEMA 1 enclosure
SERIES HS & F HERMETICALLY SEALED SWITCHES
•
Ideal for use in salt and other corrosive
atmospheres
•
Series “HS” is positively pressurized
capsules for entire mechanism and contacts
•
Process temperatures to +750° F (+399° C)
SERIES J & K PNEUMATIC SWITCHES
•
Suited for applications where electrical
power is not available
•
Bleed and non-bleed designs
•
Process temperatures to
+400° F (+204° C)
BASIC ELECTRICAL RATINGS
Voltage
120 VAC
240 VAC
24 VDC
120 VDC
240 VDC
Switch Series and Non-Inductive Ampere Rating
B
C
D
F
HS
15.00
15.00
6.00
0.50
0.25
15.00
15.00
10.00
1.00
0.50
10.00
—
10.00
10.00
3.00
0.25
—
4.00
0.30
—
5.00
5.00
5.00
0.50
0.25
SERIES B, C & D DRY CONTACT SWITCHES
•
Dry contact for applications
where mercury must be avoided
•
Designs for AC and DC
current applications
•
Process temperatures
to +450° F (+232° C)
SPECIFIC
GRAVITY
CORRECTION
Model F10 Example:
The maximum adjustment for an increasing flow rate on
a Model F10 with a liquid specific gravity of .70 in an 8"
line is: 230 GPM x 1.20 = 276 GPM.
Model F50 Example:
The actuation flow rate of a liquid with specific gravity
of 1.10 on increasing flow for a Model F50 with a 1"
body and an “E” size disc is: 5.5 GPM x 0.95 = 5.2 GPM.
Specific Gravity
.95
1.00
1.05
1.10
1.15
1.20
1.25
1.30
1.35
1.40
1.45
Multiplication Factor
1.03
1.00
.98
.95
.93
.91
.89
.88
.86
.85
.83
To determine the actuating flow rates for liquids other
than water (approximate viscosity of 20 centistokes or
less), a specific gravity correction factor must be applied
to the water flow rates given in the table. For gas/air
applications, consult factory.
Specific Gravity
.40
.45
.50
.55
.60
.65
.70
.75
.80
.85
.90
4
Multiplication Factor
1.58
1.49
1.41
1.35
1.29
1.24
1.20
1.15
1.12
1.08
1.05
AGENCY
AGENCY
APPROVALS
APPROVAL
CATEGORIES
MODEL
FM
F10-XXXX-XXX
F50-XXXX-XXX
F10-XXXX-XXX
F50-XXXX-XXX
with an electric switch mechanism and a housing
listed as TYPE 4X/7/9
with an electric switch mechanism and a housing
listed as TYPE 4X/7/9 Class
I,
Div 1, Group B
with a Series HS or F electric switch mechanism
and a housing listed as CSA TYPE 4X
with an electric switch mechanism and a housing
listed as TYPE 4X/7/9
with an electric switch mechanism and a housing
listed as TYPE 4X/7/9 Class
I,
Div 1, Group B
with an electric switch mechanism and an
ATEX housing
Class
I,
Div 1, Groups C & D
Class
II,
Div 1, Groups E, F & G
Class
I,
Div 1, B, C & D
Class
II,
Div 1, Groups E, F & G
Class
I,
Div 2, Group B
Class
I,
Div 1, Groups C & D
Class
II,
Div 1, Groups E, F & G
Class
I,
Div 1, Groups B, C & D
Class
II,
Div 1, Groups E, F & G
ATEX
II
2 G EEx d
IIC
T6
94/9/EC
IEC Ex Ex d
IIC
T6
IP 66
Installation Category
II
Pollution Degree 2
CSA
F10-XXXX-XXX
F50-XXXX-XXX
F10-XXXX-XXX
F50-XXXX-XXX
F10-XXXX-XXX
F50-XXXX-XXX
ATEX/ IEC Ex
F10-XXXX-XXX
F50-XXXX-XXX
CE
F10-XXXX-XXX
F50-XXXX-XXX
Low Voltage Directives 2006/95/EC
Per Harmonized Standard:
EN 61010-1/1993 & Amendment No. 1
IEC Installation Instructions:
The cable entry and closing devices shall be Ex d certified suitable for the conditions of use and correctly installed.
For ambient temperatures above +55° C or for process temperatures above +150° C, suitable heat resistant cables shall be used.
Heat extensions (between process connection and housing) shall never be insulated.
Special conditions for safe use:
When the equipment is installed in process temperatures higher than +85° C the temperature classification must be reduced
according to the following table as per IEC60079-0.
Maximum Process
Temperature
< 85° C
< 100° C
< 135° C
< 200° C
< 300° C
< 450° C
Temperature
Classification
T6
T5
T4
T3
T2
T1
These units are in conformity with IECEx KEM 05.0020X
Classification Ex d
IIC
T6
Tambient -40° C to +70° C
5
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