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Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit
armstrong
international.com for up-to-date information.
Customer Notice for Oxygen Service
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Notice to Users
Warning based on Electric Appliances Safety Control Act of Korea. This product should be handled as electromagnetic
radiation emitting equipment, and is intended for use by industrial dealers and end-users. It is not for residential use.
NIST Standard Reference Database 23, NIST Reference Fluid Thermodynamic and Transport Properties: REFPROP
Version 9.x. Standard Reference Databases are copyrighted by the U.S. Secretary of Commerce on behalf of the United
States of America. All rights reserved. No part of the database may be reproduced, stored in a retrieval system or
transmitted, in any form or by any means, electronic, mechanical, photocopying, recording or otherwise without prior
permission.
Unless you have specifically ordered Armstrong’s optional O
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cleaning, this flow meter may not be fit for oxygen
service. Some models can only be properly cleaned during the manufacturing process. Armstrong International is not
liable for any damage or personal injury, whatsoever, resulting from the use of Armstrong’s standard vortex meters for
oxygen gas.
Specific Conditions of Use
(ATEX/IECEx)
Contact Manufacturer regarding Flame path information.
Clean with a damp cloth to avoid any build-up of electrostatic charge.
The Armstrong AVF and AVI Vortex Flowmeters standard temperature option (ST) process temperature range is -40°C
to 260°C. The high temperature option (HT) process temperature range is -40°C up to +400°C.
AVF Vortex Flowmeters Process Temperatures
Tmax
(Process)
Temperature Class Value (Gas)
ST Version
HT Version
80°C
T6
85°C
95°C
T5
100°C
130°C
T4
135°C
195°C
T3
200°C
260°C
T2
300°C
400°C
N/A
405°C
