OMEGA MFT-14 Manual

MFT Series

Multiconductor Feedthroughs

INSTRUCTION

SHEET

INTRODUCTION

The OMEGA®MFT multiconductor feedthroughs are designed for use in
applications that require several thermocouple sensors to pass through a
wall or a bulkhead at one opening or within a small area. They are
manufactured from 416 stainless steel. Their heavy duty construction allows
the MFT fittings to be used in high pressure or vacuum applications (when
used with stainless steel ferrules).

UNPACKING

Check to see that the following parts are in the package: MFT Housing,
Pusher, Lock Pin, Nut, Ferrules, Blind Probes, Operator’s Manual.

Remove the Packing List and verify that you have received all equipment. If
you have any questions about the shipment, please call the OMEGA
Customer Service Department at 1-800-622-2378 or 203-359-1660. We can
also be reached on the Internet at

omega.com e-mail: [e-mail]

When you receive the shipment, inspect the container and equipment for
any signs of damage. Note any evidence of rough handling in transit.
Immediately report any damage to the shipping agent.

The carrier will not honor any claims unless all shipping material
is saved for their examination. After examining and removing
contents, save packing material and carton in the event
reshipment is necessary.

FERRULES

All multiconductor feedthroughs are supplied in standard form with 300
series stainless steel ferrules (necessary in high pressure or vacuum
applications). When the nut is tightened, these stainless steel ferrules
deform and become permanent. Note that the probe sheath will become
nicked as the ferrule forms around it.

If it is required that the probes be removed or replaced several times in the
feedthrough, teflon ferrules should be used. Teflon ferrules will not deform
the probe sheath, thus allowing the same probe to be re-used.

NOTE

M0152/0103

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2

IMPORTANT NOTE

NEVER re-use ferrules! Once the pusher part of the MFT assembly has pressed

against them, ferrules are deformed in some way (both steel and teflon ferrules).

ALWAYS replace the ferrules when re-using the multiconductor feedthrough.

Replacement part numbers are listed at the end of this manual.

MALE THREADED CAPS

An optional male threaded cap is also available for use when assembling the
MFT for certain applications (Figure 2b). They are used INSTEAD of the nut
(that is provided) when an external male NPT thread is needed. Using the
threaded cap will allow for a conduit pipe to be threaded directly onto the
MFT housing.

3

MFT HOUSING MFT HOUSING

STANDARD NUT OPTIONAL MALE

THREADED CAP
(FTN)

a. MFT WITH
STANDARD NUT

b. MFT WITH
OPTIONAL FTN CAP

Figure 2. MFT, Side Views

MFT ASSEMBLY

Step 1.

Assemble the OMEGA Multiconductor Feedthrough and Probes as shown
in Figure 1. Ensure that, all parts are clean. Dirt or foreign material in the
fitting can cause leaks or failure. Make sure all unused holes are plugged.
(Blind probes are provided). Teflon tape should be used on all pipe joints to
provide a good seal and to prevent the thread parts from seizing each other
on disassembly.

Step 2.

Tighten the nut or male threaded cap finger-tight. Scribe a reference mark
on it along the top of the housing and the nut to mark the “zero” position.

From that point, tighten the nut approximately

1

⁄3-turn for all sizes but the 1⁄4"

probes. (See Figure 3).

For the

1

⁄4" probes, tighten the nut approximately 1⁄2 -turn minimum. (See

Figure 3).

4

PRESSURE OR VACUUM APPLICATIONS

If OMEGA feedthroughs are used in pressure or vacuum applications, read
and follow the instructions carefully. After proper installation and
tightening, bring the system pressure up (or down) slowly while testing for
pressure. IF ANY LEAKAGE is detected, return pressure to atmosphere at
once and repair or replace fittings. Do not mix or interchange parts of tube
fittings made by other manufacturers. Use only OMEGA parts to prevent
product failure. Do not attempt to re-use “used” ferrules.

REPLACEMENT PARTS AND OPTIONS

• 300 Series Stainless Steel Ferrules (pkg of 10):
OMEGA Part Number: SS-FER-*

• Telfon Ferrules (pkg of 10): OMEGA Part Number: T-FER-*
(* Where the star is replaced by the sheath diameter in inches)

• Optional Male Threaded Cap (3 Sizes):
OMEGA Part Number: (for

1

⁄4" NPT) FTN-1-14

(for

1

⁄2" NPT) FTN-1-12

(for

3

⁄4" NPT) FTN-1

• Teflon Tape, 1⁄2" by 260": OMEGA Part Number: Teflon Tape

5

It is the policy of OMEGA Engineering, Inc. 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 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, human applications.

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 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.

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 informa-

tion 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 2009 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.

Servicing North America:

U.S.A.: Omega Engineering, Inc., One Omega Drive, P.O. Box 4047

ISO 9001 Certified

Stamford, CT 06907-0047
Toll-Free: 1-800-826-6342 Tel: [phone]
FAX: [phone] e-mail: [e-mail]

Canada: 976 Bergar

Laval (Quebec), Canada H7L 5A1
Toll-Free: 1-800-826-6342 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

For immediate technical or application assistance:

U.S.A. and Sales Service: 1-800-826-6342/1-800-TC-OMEGA

®

Canada: Customer Service: 1-800-622-2378/1-800-622-BEST

®

Engineering Service: 1-800-872-9436/1-800-USA-WHEN

®

Mexico: En Español: 001 [phone] FAX: [phone]

[e-mail] e-mail:[e-mail]

OMEGAnet®Online Service Internet e-mail

omega.com [e-mail]

Servicing Europe:

Benelux: Managed by the United Kingdom Office

Toll-Free: 0800 099 3344 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

Czech Frystatska 184
Republic: 733 01 Karviná, Czech Republic

Toll-Free: 0800-1-66342 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

France: Managed by the United Kingdom Office

Toll-Free: 0800 466 342 TEL: [phone]
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Germany/ Daimlerstrasse 26, D-75392 Deckenpfronn, Germany
Austria Toll-Free: 0 800 6397678 TEL: [phone]

FAX: [phone] e-mail: [e-mail]

United OMEGA Engineering Ltd.
Kingdom: One Omega Drive, River Bend Technology Centre, Northbank

ISO 9001

Irlam, Manchester M44 5BD England

Certified

Toll-Free: 0800-488-488 TEL: [phone]
FAX: [phone] e-mail: [e-mail]

6

Where Do I Find Everything I Need for

Process Measurement and Control?

OMEGA…Of Course!

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SM

TEMPERATURE

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Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies

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Wire: Thermocouple, RTD & Thermistor

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Calibrators & Ice Point References

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Recorders, Controllers & Process Monitors

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Infrared Pyrometers

PRESSURE, STRAIN AND FORCE

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Transducers & Strain Gages

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Load Cells & Pressure Gages

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Displacement Transducers

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Instrumentation & Accessories

FLOW/LEVEL

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Rotameters, Gas Mass Flowmeters & Flow Computers

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Air Velocity Indicators

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Turbine/Paddlewheel Systems

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Totalizers & Batch Controllers

pH/CONDUCTIVITY

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pH Electrodes, Testers & Accessories

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Benchtop/Laboratory Meters

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Controllers, Calibrators, Simulators & Pumps

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Industrial pH & Conductivity Equipment

DATA ACQUISITION

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Communications-Based Acquisition Systems

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Plug-in Cards for Apple, IBM & Compatibles

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HEATERS

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Heating Cable

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Flexible Heaters

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ENVIRONMENTAL
MONITORING AND CONTROL

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Pumps & Tubing

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pH, Conductivity & Dissolved Oxygen Instruments