Flowmetering Target flowmeters 3
Local regulations may restrict the use of this product to below the conditions quoted. In the interests of development and improvement of the product, we reserve the right to change the specification without notice. © Copyright 2016
TI-P193-01 MI Issue 4
TFA Flowmeter for Saturated Steam Service
Description The Spirax Sarco TFA flowmeter is designed for use on saturated steam only and operates on the target principle, by measuring the force produced on a target by the fluid flow. This force is then converted into density compensated mass flowrate or power and is transmitted via a single loop powered 4-20 mA and pulsed output. TFA flowmeters also incorporate a totalised flow function and EIA 232C (RS232) or EIA 485C (RS485) Modbus communications.
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TFA flowmeter body
Where applicable the installation requires: 2 x Centralising bushes over the lower two bolts of the flange connection - See the selection table for 'Centralising bush kits' on page 5). Note: The centralising bush kit must be ordered for the installation flange type used on your application - See 'How to order' on page 5 for a typical example.
Direction of flow within the pipeline
Ensure that the direction of flow in the pipeline matches the directional flow arrow on the body.
Sizes and pipe connections The TFA flowmeter is of wafer design, available in the listed specified sizes suitable for fitting between the following flanges: DN25, DN32, DN40 and DN50
Flowmeter stem
Flanged EN 1092-1 PN16, PN25 and PN40, Japanese Industrial Standard JIS 20 and Korean Standard KS 20 1", 1 ¼ ", 1 ½ " and 2" Flanged ASME B 16.5 Class 150 and Class 300 Note:
The Spirax Sarco TFA flowmeter should be installed in pipework manufactured to BS 1600, ASME B 36.10 Schedule 40 or EN 10216-2 / EN 10216-5 equivalent. For systems with different standards / schedules, please contact Spirax Sarco.
Electronics housing
Technical data IP rating
IP65 with correct cable glands
Loop powered with optional RS485: 24VDC
Power supply
Materials Flowmeter body
4-20mA (not available with RS485 option) Pulsed output: V max 28 Vdc R min 10 k W Modbus EIA 232C (RS 232C) with optional RS485: EIA 485 (RS 485C)
Outputs - proportional to mass flow or power
Stainless steel 300 series
Internals
Stainless steel 431 S29 / 300 series
Flowmeter stem
Stainless steel 300 series
Communication port
Electronics housing
Aluminium LM25
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TI-P193-01 MI Issue 4
TFA Flowmeter for Saturated Steam Service
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