Omega Engineering FTB100 Series Manual de usuario
FTB100 and FTB200 Series
Liquid Turbine Flowmeters
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: (203) 359-1660
Canada: 976 Bergar
Laval (Quebec), H7L 5A1 Canada
Toll-Free: 1-800-826-6342 TEL: (514) 856-6928
For immediate technical or application assistance:
U.S.A. and Canada: Sales Service: 1-800-826-6342/1-800-TC-OMEGA®
Customer Service: 1-800-622-2378/1-800-622-BEST®
Engineering Service: 1-800-872-9436/1-800-USA-WHEN®
Mexico En Español: 001 (203) 359-7803 FAX: 001 (203) 359-7807
Servicing Europe:
Benelux: Managed by the United Kingdom Office
Toll-Free: 0800 099 3344 TEL: +31 20 347 21 21
Czech Republic: Frystatska 184
733 01 Karviná, Czech Republic
Toll-Free: 0800-1-66342 TEL: +420-59-6311899
France: Managed by the United Kingdom Office
Toll-Free: 0800 466 342 TEL: +33 (0) 161 37 29 00
Germany/Austria: Daimlerstrasse 26
D-75392 Deckenpfronn, Germany
Toll-Free: 0800 6397678 TEL: +49 (0) 7056 9398-0
United Kingdom: OMEGA Engineering Ltd.
ISO 9001 Certified One Omega Drive, River Bend Technology Centre, Northbank
Irlam, Manchester M44 5BD United Kingdom
Toll-Free: 0800-488-488 TEL: +44 (0) 161 777-6611
OMEGAnet®Online Service Internet e-mail
omega.com [email protected]
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.
-1-
CONTENTS
1. Introduction --------------------------------------------------------------- 2
2. Specifications (Liquid Turbine) --------------------------------------- 3
3. Model Number------------------------------------------------------------ 4
4. Principal of Operation--------------------------------------------------- 5
Material Selection and Construction ---------------------------------- 6
Flowmeter Calibrations ------------------------------------------------- 6
5. Installation----------------------------------------------------------------- 7
6. Maintenance and Troubleshooting-----------------------------------10
Pickup Coil Testing----------------------------------------------------- 10
Bearing Testing --------------------------------------------------------- 10
Bearing Replacement--------------------------------------------------- 12
-2-
1. Introduction
The following information is provided for the proper installation and
maintenance of your instrument.
-3-
2. Specifications
Over-range: 150% of maximum flow (intermittently)
Turn Down Range: 10:1
Linearity: ±0.5% of reading typical
Repeatability: ±0.1% of reading over repeatable range
Temperature Range: -268 to 232°C (-450 to 450°F)
End Fittings: Standard: NPT
Optional: MS flared and flanged styles
Bearing Styles: Self lubricating, ceramic hybrid ball bearings
Materials: 316/316L dual rated stainless steel with
17.4 pH rotor.
Consult OMEGA Flow Engineering
for other available materials.
-4-
3. Model Number
-5-
4. Principal of Operation
The turbine flow sensor consists of a rotor assembly which is supported
on a shaft held in place by triple tube clusters and secured with locking
nuts within the flowmeter housing.
The rotor is free to spin on a self lubricated ceramic ball bearing. A
magnetic type pickup coil is attached on the exterior of the flowmeter
housing.
A low mass rotor design allows for rapid dynamic response. The
deflector cones eliminate downstream thrust on the rotor and allows for
dynamic positioning of the rotor between deflector cones.
The dynamic positioning of the low mass rotor provides wider
rangeability and longer bearing life than that of conventional turbine
flowmeters. Integral flow straightening tubes minimize the effects of
upstream flow turbulence.
As the liquid flows through the flowmeter the rotor spins at rate
proportional to the volumetric liquid flowrate.
Each rotor blade passing through the pickup coil generates an electrical
pulse. The frequency of the pulses is proportional to flowrate. The
summation of pulses represents total amount of liquid volume passed
through the meter.
Pickup Coil
Riser
(Threaded)
Rotor
Deflector Cones
Flow
Straightene
r
-6-
The number of pulses generated per unit of volume is called the
calibration factor or K-Factor. This calibration factor is used to
calculate flowrate and total amount of flow.
Material Selection and Construction
The housing is made of 316 stainless steel. The rotor is made of 17.4
pH stainless steel. Bearings are shielded, ceramic hybrid ball bearings
and are made of 440C stainless steel. Bearings are self lubricating type
and do not require any external lubrication.
Flowmeter Calibrations
The standard calibration provided with an Omega turbine flowmeter
consists of a 10-point water calibration that is traceable to NIST. Based
on this water calibration, we derive an average k-factor for water for
the flowmeter
The uncertainty of this calibration is typically 0.1%.
The K-factor on turbine flowmeters used on liquid service is NOT
density dependent.
-7-
5. Installation
Inspect all packages for any indications of damage which may have
occurred during shipment.
Verify that all meter parts or auxiliary components have arrived with
the shipment. Refer to the packing list/invoice for a detailed list of
items included in the shipment.
The flowmeter may be installed horizontally or vertically for liquid
service without affecting the meter calibration.
It is required to install meter with a minimum straight run of pipe
approximately 10 pipe diameters ahead of the inlet and 5 pipe
diameters following the outlet.
The meter housing is marked by a flow direction arrow and the inlet is
marked ‘IN’ and the outlet is marked ‘OUT’. The meter must be
installed in the piping in the correct orientation to ensure the most
accurate operation.
Install meter with adequate distance and isolation from electric motors,
transformers, welding equipment and solenoids to avoid any
electromagnetic interference from ambient electrical field.
-8-
A typical flowmeter installation is shown below:
Figure 1: Typical Flowmeter Installation
Blocking and Bypass valves should be installed if it is necessary to do
preventive maintenance on the flowmeter without shutting down the
flow system. The Bypass valve can be opened before the Blocking
valves allowing the flow to continue while removing the turbine
flowmeter for service.
IMPORTANT: All flow lines should be purged prior to installing the
meter. To prevent possible damage to the meter, install the
meter ONLY in flow lines that are clean and free of debris.
Upon initial start-up of the system a spool piece should be installed in
place of the flowmeter so that purging of the system can be performed
to remove all particle debris which could cause damage to the meter
internals.
CAUTION: Avoid over-spinning the meter. Over-spinning the meter
may cause damage to the meter internals and lead to
needless meter failure.
BYPASS RUN
Turbine FlowmeterStrainer
Blocking ValveBlocking Valve
Flow Straighener
Bypass Valve
METER RUN
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