Flowmetering Target flowmeters 3
Safety information, installation and maintenance For full details see the Installation and Maintenance Instructions (IM-P193-02 and IM-P193-03) supplied with the product. The following main points are given for guidance only: 1. The TFA flowmeter should be mounted with the 'concave' side of the target facing upstream, with a minimum of 6 straight pipe diameters upstream and 3 downstream. No valves, fittings or cross sectional changes are permitted within these pipe lengths. Where an increase in nominal pipe diameter is required, upstream of the flowmeter, the length of straight pipe should be increased to 12 diameters. Similarly, where a flowmeter is installed downstream of two 90 ° bends in two planes, a pressure reducing valveor a partly open valve, 12 upstream pipe diameters should be allowed. 2. It is important that the internal upstream and downstream diameters of pipe are smooth. Ideally seamless pipes should be used and there should be no intrusive weld beads on the internal diameter. 3. The TFA flowmeter must be installed concentrically in the line using the centralising bush kit (ordered separately). If this is not done, flow measurement errors may occur.
4. The TFA flowmeter can be installed in any orientation up to a line pressure of 7 bar g (102 psi g). 5. As with all steam flowmetering installations, good basic steam engineering practices should be followed:
- Correct line drainage through adequate trapping. - Good alignment and support of associated pipework. - Line size changes achieved by the use of eccentric reducers. - Do not lag (insulate) the TFA body or the mating flanges.
3.3 11
Centralising bush kits
Flange type
TFA size
EN 1092 PN16 PN25 PN40
ASME 150
ASME 300
JIS 20 KS 20
DN25 1"
1930283
1930283
1930283
DN32 1¼" DN40 1½"
1930283
1930283
1930283
1930283
1930483
DN50 2"
1930283
1930283
1930583
How to order Example: 1 off Spirax Sarco DN25 TFA flowmeter supplied with centralising bush kit 1930283 suitable for mounting between
EN 1092 PN40 flanges for use on saturated steam at 10 bar g - Maximum flow 349 kg / h. Note: For details of the optional remote display see the relevant Spirax Sarco M750 literature.
Software copyright Certain computer programs contained in this product [or device] were developed by Spirax-Sarco Limited ('the Work(s)'). Copyright © Spirax-Sarco Limited 2016 All Rights Reserved Spirax-Sarco Limited grants the legal user of this product (or device) the right to use the Work(s) solely within the scope of the legitimate operation of the product (or device). No other right is granted under this licence. In particular and without prejudice to the generality of the foregoing, the Work(s) may not be used, sold, licensed, transferred, copied or reproduced in whole or in part or in any manner or form other than as expressly granted here without the prior written consent of Spirax-Sarco Limited.
Page 5 of 5
TI-P193-01 MI Issue 4
TFA Flowmeter for Saturated Steam Service
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