Symbol 5597 from IEC 60417 - Title/Meaning: Steam, low jet Function/description: To identify the control with which the steam is being released.
Additional information: 
In conjunction with symbols 5598 or 5599 this symbol indicates a low level release
The title was changed on 2014-06-21 as follows.;This new release ;IEC 60417-5597 (2014-06-21): Steam, low jet;replaced;IEC 60417-5597 (2002-10-07): Steam
Published in: Supplement N, 1995;3C(Central Office)192
Own work using: iso.org/obp/graphics/grs/27da510a-8ae0-4d3d-b141-28c97b19e3f6 200.png
Vectorization:  Mrmw