Omega Products FSW-40 Installation Manual

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User’s Guide

FSW-40 Series

Fluid Flow Switches

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Servicing North America:

USA: One Omega Drive, Box 4047

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For immediate technical or application assistance:

USA and Canada: Sales Service: 1-800-826-6342 / 1-800-TC-OMEGA

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M44 5EX United Kingdom
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It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that
apply. OMEGA is constantly pursuing certification of its products to the European New Approach
Directives. OMEGA will add the CE mark to every appropriate device upon certification.

The information contained in this document is believed to be correct, but OMEGA Engineering, Inc. accepts
no liability for any errors it contains, and reserves the right to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be used for, patient-connected applications.

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WARRANTY/DISCLAIMER

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and
workmanship for a period of 13 months from date of purchase. OMEGA’s Warranty adds an
additional one (1) month grace period to the normal one (1) year product warranty to cover
handling and shipping time. This ensures that OMEGA’s customers receive maximum
coverage on each product.

If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer
Service Department will issue an Authorized Return (AR) number immediately upon phone or
written request. Upon examination by OMEGA, if the unit is found to be defective, it will be
repaired or replaced at no charge. OMEGA’s WARRANTY does not apply to defects resulting
from any action of the purchaser, including but not limited to mishandling, improper interfacing,
operation outside of design limits, improper repair, or unauthorized modification. This
WARRANTY is VOID if the unit shows evidence of having been tampered with or shows evidence
of having been damaged as a result of excessive corrosion; or current, heat, moisture or vibra­tion; improper specification; misapplication; misuse or other operating conditions outside of
OMEGA’s control. Components which wear are not warranted, including but not limited to
contact points, fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products. However,
OMEGA neither assumes responsibility for any omissions or errors nor assumes liability
for any damages that result from the use of its products in accordance with information
provided by OMEGA, either verbal or written. OMEGA warrants only that the parts
manufactured by it will be as specified and free of defects. OMEGA MAKES NO OTHER
WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESS OR
IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY
WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
HEREBY DISCLAIMED. LIMITATION OF LIABILITY: The remedies of purchaser set forth
herein are exclusive, and the total liability of OMEGA with respect to this order, whether
based on contract, warranty, negligence, indemnification, strict liability or otherwise, shall
not exceed the purchase price of the component upon which liability is based. In no event
shall OMEGA be liable for consequential, incidental or special damages.

CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as
a “Basic Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity;
or (2) in medical applications or used on humans. Should any Product(s) be used in or with any
nuclear installation or activity, medical application, used on humans, or misused in any way,
OMEGA assumes no responsibility as set forth in our basic WARRANTY/ DISCLAIMER language,
and, additionally, purchaser will indemnify OMEGA and hold OMEGA harmless from any liability
or damage whatsoever arising out of the use of the Product(s) in such a manner.

RETURN REQUESTS/INQUIRIES

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department.
BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN
AUTHORIZED RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT
(IN ORDER TO AVOID PROCESSING DELAYS). The assigned AR number should then be
marked on the outside of the return package and on any correspondence.

The purchaser is responsible for shipping charges, freight, insurance and proper packaging to
prevent breakage in transit.

FOR WARRANTY

RETURNS, please have
the following information available BEFORE
contacting OMEGA:

1. Purchase Order number under which

the product was PURCHASED,

2. Model and serial number of the product

under warranty, and

3. Repair instructions and/or specific

problems relative to the product.

FOR NON-WARRANTY REPAIRS,

consult
OMEGA for current repair charges. Have the
following information available BEFORE
contacting OMEGA:

1. Purchase Order number to cover the

COST of the repair,

2. Model and serial number of the

product, and

3. Repair instructions and/or specific problems

relative to the product.

OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible.
This affords our customers the latest in technology and engineering.

OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2000 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied,

reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without
the prior written consent of OMEGA ENGINEERING, INC.

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IN

General Description

The OMEGA®FSW-40 Series Flow Switches feature 15A SPDT switches
with an internal screw adjustment which provides continuous switch
point adjustment while in operation in-line. Multiple drag disks and drag
strips are supplied with each unit to provide incremental switch point
adjustment. Their non-magnetic design makes them ideal for applications
where rust is a problem. The FSW-40 Series Switches come standard in
a brass construction. An optional 316 stainless steel construction is also
available.

The FSW-40 Series also features a filter boot to protect the swinging arm
from particle clogging, making this ideal for medium slurries, machine
cutting oils, and certain sewage applications where large objects will not
get caught on the drag disks.

Installation tees are recommended for installing switches for 2” pipe size
and below. For other pipe sizes, a tee fitting or weld coupling can be
used. Model FSW-40 is for use with 1” pipe; FSW-41 is for use with 1

1

/2”

to 2

1

/2” pipe; FSW-42 is for use with 3” to 10” pipe; and FSW-43 is for use

with 10” to 48” pipe.
DO NOT USE with flammable liquids or in hazardous areas. These

flow switches are not explosion-proof. They can be made intrinsically
safe when used with intrinsically safe relays, such as OMEGA’s LVC550
Series, and installed in accordance with the National Electrical Code by
personnel familiar with intrinsic safety wiring.

Features

• Rugged Industrial Design

• Switch Point Adjustable While Unit is Operating

• 15A SPDT Switch Directly Controls Pump

• Responds to Flow, Independent of a Broad Range of Environmental
Conditions

• Maintains Calibration Limits When Subjected to Reasonable Line
Hydraulic Hammer or Surge Pulses

1

COLOR CODED WIRING

15 AMP, SPDT MICROSWITCH
ELIMINATES RELAYS, ALLOWS
DIRECT CONTROL OF PUMP,
MOTORS, SOLENOID VALVES,
HEATERS, ETC.

WATER, OIL RESISTANT
ELECTRICAL CABLE
STRAIN RELIEF

WATER, OIL RESISTANT
PVC COVER SEAL

VARIABLE FEEDTHRU SHAFT LENGTH
ALLOWS USE IN PIPES FROM
1”-48” OR MORE

QUICK CHANGE DRAG DISKS
(TEFLON FOR 316 SS MODELS)
PROVIDE EXTREMELY WIDE
OPERATING RANGE OF FLOW
RATES AND VISCOSITIES

RUGGED NORYL COVER

CONTINUOUS SWITCH
POINT ADJUSTMENT

REMOVE COVER AND LID ONLY FOR
QUICK ORIFICE CHANGE WITHOUT
REMOVING BODY FROM LINE

STABLE STAINLESS STEEL
SPRING (NOT SHOWN)

PATENTED MOLDED ELASTOMER
FEEDTHRU SEAL (STANDARD MODEL)

PATENTED MOLDED VITRON FEEDTHRU
WITH SEALED PIVOT (316 SS MODEL)

316 STAINLESS STEEL BODY
AND LID (316 SS MODELS ONLY)

FSW-40 Series Switch

2

Drag Disks/Strips Supplied

Different Drag Disks are supplied with the various models of the FSW-40
Series Switches. All of the switches come with the L Drag Disk installed. The
other drag disks supplied are as follows (refer to the Drag Disk Diagram, and
Table 1 and 2):

MODEL

DRAG DISKS SUPPLIED

FSW-40 H, L (installed)

FSW-41 H, L (installed), LL

FSW-42 H, L (installed), LL (3, 3

1

/2, 4”), LL (5” and larger), LLL (6” and

larger)

FSW-43 H, L (installed), LL (5” and larger), LLL (6” and larger)