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SRFRA/SRFGA
Flexable Silicone Rubber Heaters
INSTRUCTION
SHEET
M5719/0119
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For latest product manuals: omegamanual.info
DESCRIPTION
Silicone Rubber Fiberglass Insulated
Heaters can improve heat transfer
and speed warm-ups where controlled
heating is required in confined areas.
Two circuit designs are available:
etched foil or wire wound. Heaters
with etched foil designed elements
are available where the length
or width dimension is less than
254 mm (10"). All other heaters
where both the length and the width
dimensions exceed 254 mm (10")
use the wire-wound element design.
Effect of wattage density (at 115V):
gentle warming is best done with
2.5 W/in2. A good all-purpose unit is
the 5 W/in2. Rapid warm-up and high
temperature are achieved with the
10 W/in2; however, temperature must
be controlled as the safe maximum
operating temperature limit of
232°C (450°F).
Two general styles are covered in
this manual. Round silicone rubber
heaters and rectangular silicone
rubber heaters. All part numbers and
total wattage for each heater are listed
in specification sheet of SRFRA/
SRFGA Series.
ROUND SILICONE RUBBER
HEATERS
Styles are available from 3 to 12"
diameters. The part number scheme
is as follows:
• SRFRA-[ ]/* for those heaters without the pressure sensitive adhesive.
• SRFRA-[ ]/*-P for those heaters with
the pressure sensitive adhesive.
Where [ ] is the diameter of the heater
and * is the watt density.
NOTES: Heaters with pressure
sensitive adhesive are not available
at 10 W/in2. Maximum operating
temperature is 149ºC (300º F).
Examples:
6" round heater with 2.5 W/in
wattage density, without pressure
sensitive adhesive has the part
number SRFRA-6/2.
2
8” round heater with 5 W/in2
wattage density, with pressure
sensitive adhesive has the part
number SRFRA-8/5-P.
RECTANGULAR SILICONE
RUBBER HEATERS
Styles are available from 1" width
by 1" length to 12" width by 48"
length. More specifically, the length
varies from the smallest width
dimension increasing by 1 inch to
12", and jumps to 18", 24", 30",
36", 42", and 48".
NOTES: Some sizes of heaters
do not come in all lengths listed
above. For details, refer to The
Specification sheet of SRFRA/
SRFGA Series lists the total
wattage for each heater. The part
number scheme is as follows:
• SRFRGA-[X) []/* for those
heaters without the pressure
sensitive adhesive.
• SRFRGA-[X] [ ]/*-P for those
heaters with the pressure sensitive
adhesive.
where [X] is the width of the
heater, [ ] is the length of the
heater, and * is the watt density.
NOTES: Heaters with pressure
sensitive adhesive are not
available at 10 W/in2.
The maximum operating
temperature is 149ºC (300ºF).
Examples:
Smallest heater 1" wide x 5" long
with a wattage density of 10 W/in2
and no pressure sensitive
adhesive (not available in 2.5 W/in
2
or 5 W/in
) has the part number of
SRFGA-105/10.
1" W x 48" L heater with 5 W/in2
wattage density with pressure
sensitive adhesive has the part
number of SRFG-148/5-P.
2" W x 8" L heater with 10 W/in2
wattage density without pressure
sensitive adhesive has the part
number of SRFG-208/10.
2
6" W x 42" L heater with 2.5 W/in
wattage density with pressure
sensitive adhesive has the part
number of SRFGA-642/2-P.
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INSTALLATION AND
OPERATION CAUTION!
Use a method of temperature
control (e.g., thermostat,
thermocouple and temperature
controller, or variable voltage
transformer) to prevent heaters
from exceeding maximum
operating temperature ratings.
Place temperature sensor close
enough to the heater to sense
heater temperature.
1. DO NOT immerse heaters in
liquids.
2. DO NOT operate heaters at a
voltage higher than the specified
or rated voltage.
Heaters CAN be operated at the
rated voltage of 115 VAC or lower.
In order to determine the actual
wattage developed at applied
voltages lower than the rated
voltage, use the following formula:
PA= PR x V
where: PR = rated wattage; PA =
actual wattage; VR = rated voltage
and VA = actual voltage
3. DO NOT cut, punch holes in or
otherwise mishandle heaters.
4. AVOID exposing heaters to
chemicals, acids, alkalies, oils,
fluids or other substances that
could ignite or cause damage to
the heater.
5. DO NOT insulate heaters unless
adequate measures are taken to
control heater temperature.
6. DO NOT leave heater operating
unattended unless adequate
controls are installed to insure
safety.
7. Heaters can be bent around
curved surfaces; however,
DO NOT exceed minimum
bending radius.
2
A
2
V
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8. Exercise care in attaching heaters
to flat or curved surfaces. Heaters can
be attached by mechanical
clamping, by using factory applied
pressure sensitive adhesive (PSA),
or with a thin layer of RTV. Make
sure that the entire heater is in contact
with the surface with no air pockets
trappedunderneath. This is especially
important for high watt density
heaters, i.e., heaters with a watt
density of 10 watts/square inch, to
prevent heater failure. DO NOT
overlap heaters.
9. Heaters must be attached to an
appropriate heat sink and should
NOT be mounted free standing in air.
10. Make sure heaters are installed
and used by qualified personnel.
DO NOT attempt to repair
damaged heaters.
SPECIFICATIONS
HEATING ELEMENT DESIGN:
etched foil designed elements
are available where the length
or width dimension is less than
254 mm (10"). All other heaters
are wire wound.
MAXIMUM OPERATING
TEMPERATURE: Heaters with-
out Pressure Sensitive Adhesive
(PSA), 232°C (450°F). Heaters
with Pressure Sensitive Adhesive
(PSA), 120°C (250°F).
VOLTAGE: 115 Volts
WATT DENSITY: 2.5, 5 or
10 watts/in2
WATTAGE: 5 to 1440 watts
PRESSURE SENSITIVE
ADHESIVE (PSA): optional, not
available at 10 watts/square inch
watt density
LEAD WIRE: 305 mm (12")
UL1180 PTFE Insulated
DIELECTRIC STRENGTH:
1250 VAC
MINIMUM BENDING RADIUS:
2.00" typical
HEATER THICKNESS:
0.040", except at lead wire exit
(thickness varies with heater)
DIMENSIONS:
Refer to the other.
omega.com [email protected]
Servicing North America:
U.S.A. Omega Engineering, Inc.
Headquarters: 800 Connecticut Ave. Suite 5N01, Norwalk, CT. 06854
Toll-Free: 1-800-826-6342 (USA & Canada only)
Customer Service: 1-800-622-2378 (USA & Canada only)
Engineering Service: 1-800-872-9436 (USA & Canada only)
Tel: (203) 359-1660 Fax: (203) 359-7700
e-mail: [email protected]
For Other Locations Visit omega.com/worldwide
The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it
contains, and reserves the right to alter specifications without notice.
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OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13
WARRANTY/DISCLAIMER
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 in which wear is not warranted, include but are 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 the company will be as specified and free of
defects. OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER,
EXPRESSED 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.
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.
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 trademark of OMEGA ENGINEERING, INC.
© Copyright 2019 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.
RETURN REQUESTS / INQUIRIES
FOR NON-WARRANTY REPAIRS,
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.
consult OMEGA for current
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