FS GAS
Gas flow switch
A gas-flow switch changes contact state for a specified gas-flow condition.
Schematic
IEEE / ANSI · FS GAS
ANSI/IEEE Gas flow switch form
IEEE-library form of gas flow switch: a gas-flow switch changes contact state for a specified gas-flow condition.
In plain English
What does ANSI/IEEE Gas flow switch form mean?
This reference locates gas flow switch in Autodesk's IEEE-oriented miscellaneous switches family. A gas-flow switch changes contact state for a specified gas-flow condition. Its process connection and operating requirement belong in the equipment schedule as well as the control logic. The public library uses HFS11S20 for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.
A simple example
Read the operating mechanism and the contact reference state together. Cross-reference every associated contact to the same device and show which movement, signal or reset changes its condition; the symbol alone does not establish the complete switching sequence.
What the drawings help you do
Do not substitute liquid-flow characteristics for the selected gas device. Gas-flow operation is a process-specific input and is separate from the contact's electrical rating. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted.
This particular reference
IEEE-library form of gas flow switch: a gas-flow switch changes contact state for a specified gas-flow condition. Gas-flow operation is a process-specific input and is separate from the contact's electrical rating.
- Normally open / normally closed
- The contact state in the normal condition defined for the drawing.
- Terminal
- An identified point where a conductor connects.
- Signal
- Electrical information passed between devices, rather than necessarily the main power supply.
Read the source: Autodesk IEEE Symbol Preview — Miscellaneous Switches
IEEE / ANSI · Flow Switch Normally Open - Gas
Autodesk IEEE Symbol Preview: Miscellaneous Switches, block HFS11S20. Matching functional counterpart linked separately. Independently drawn educational geometry; not a certified IEEE glyph or database identifier.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
Schematic · FS GAS
What it represents
This reference locates gas flow switch in Autodesk's IEEE-oriented miscellaneous switches family. A gas-flow switch changes contact state for a specified gas-flow condition. Its process connection and operating requirement belong in the equipment schedule as well as the control logic. The public library uses HFS11S20 for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.
Read the operating mechanism and the contact reference state together. Cross-reference every associated contact to the same device and show which movement, signal or reset changes its condition; the symbol alone does not establish the complete switching sequence.
Do not substitute liquid-flow characteristics for the selected gas device. Gas-flow actuation is a process-specific input and is separate from the contact's electrical rating. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted.
How to read it
- Do not substitute liquid-flow characteristics for the selected gas device.
- The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation.
Information to show or reference
- Identify gas service
- Record operating condition
- Reference contact and reset action
A distinction that matters
Gas-flow actuation is a process-specific input and is separate from the contact's electrical rating.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Autodesk IEEE Symbol Preview — Miscellaneous Switches
Public IEEE-oriented Miscellaneous Switches table explicitly lists HFS11S20 as Flow Switch Normally Open - Gas. This supports the vendor convention context, not reproduction of the publisher graphic.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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