MAGNETROL 53-4701-001

Model FLS
Flood Level Switch
Descriptive Data
TYPICAL MODEL FLS APPLICATIONS
Control Room
Figure 1
DESCRIPTION
APPLICATIONS
The Model FLS, part number 53-4701-001, is a float operated, liquid level control designed for bracket mounting in
floor level sumps or troughs. The proven Magnetrol magnetic coupling is employed to transmit float movement to a
single snap-action dry contact switch mechanism. The
switch is factory set for 3⁄ 4" level differential for off-on
control—alarm and/or safety shutdown service.
The Model FLS is used to detect leaks or spills from critical
valves, vessels, and pipelines in power plant installations,
as shown in Figure 1.
SM
Worldwide level and flow solutions
CONSTRUCTION
SWITCH MECHANISM
Simple and rugged in design, the Model FLS is constructed
of quality materials throughout to assure reliable operation
and a long trouble-free service life.
The Magnetrol series B switch mechanism with SPDT
contacts is standard and rated:
15 A resistive & 3.8 A inductive @ 120 VAC
0.50 A resistive & 0.05 A inductive @ 120 VDC
180°F maximum ambient temperature
FLOAT ENVELOPE
A perforated stainless steel float envelope is welded to a
forged steel bracket assembly totally enclosing the float and
providing a side mounting surface. A stainless steel bottom
strap, tack welded to the float envelope, acts as a low level
float stop.
A NEMA 4X,6,7/9 cast aluminum submersible electrical
enclosure is standard, and allows 180° positioning of the
conduit outlet for wiring convenience.
FLOAT AND TRIM
AVAILABLE OPTION
300 series stainless steel float with a 400 series magnetic
attraction sleeve. Internal trim is 300 series stainless steel.
Qualified to IEEE 323-1974, and IEEE 344-1975.
SWITCH HOUSING
DIMENSIONAL SPECIFICATIONS inches (mm)
5.93
(151)
4.29
(108)
6.25 7.94
(159) (202)
3.50
(89)
2.38
(60)
3.50
(89) Dia
3.25
(83)
5300 Belmont Road • Downers Grove, Illinois 60515-4499 • 630-969-4000 • Fax 630-969-9489 • www.magnetrol.com
145 Jardin Drive, Units 1 & 2 • Concord, Ontario Canada L4K 1X7 • 905-738-9600 • Fax 905-738-1306
Heikensstraat 6 • B 9240 Zele, Belgium • 052 45.11.11 • Fax 052 45.09.93
Regent Business Ct r., Jubilee Rd. • Burgess Hill, Sussex RH15 9TL U.K. • 01444-871313 • Fax 01444-871317
5300 Belmont Road • Downers Grove, Illinois 60515-4499 • 630-969-4028 • Fax 630-969-9489 • www.sticontrols.com
Copyright © 2008 Magnetrol International, Incorporated. All rights reserved. Printed in the USA.
BULLETIN: 44-306.6
EFFECTIVE: September 2000
SUPERSEDES: October 1995