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Ask for a name of a pneumatic symbol

Ask for a name of a pneumatic symbol

Ask for a name of a pneumatic symbol

(OP)
Hi everyone,

As I am reading the paper for my work about cooling air path, there is a pneumatic symbol at the end of the air path that I do not understand (there also lack of necessary wording description).
I attach its picture here and the system drawing here.
It seems like a filter but the hydraulic filter symbol has different orient shape.
I also have tried to search for it on ISO 1219 but finding it nowhere.

So I would like to ask if anyone of you has faced it and tell me what it is.

Thanks for your help.

RE: Ask for a name of a pneumatic symbol

IMO, the symbol looks like some sort of the "filter".

RE: Ask for a name of a pneumatic symbol

(OP)
@mk3223,

I guess it is a filter as well. But I see nothing similar by searching on various standards.

RE: Ask for a name of a pneumatic symbol

From what i can see, its a pneumatic piston operated ON/OFF valve.

The valve may be a ball / butterfly / knife gate etc.

RE: Ask for a name of a pneumatic symbol

(OP)
Dear srini1785,

The right part of it seems like the valve, but what I would like to ask is the left part (the square shape with oblique dotted line).
Have you ever seen this symbol?

RE: Ask for a name of a pneumatic symbol

(OP)
@IceStationZebra: Thanks so much for your comment. This seems fit best to my case.

RE: Ask for a name of a pneumatic symbol

(OP)
@IceStationZebra: Do you think those different filter symbols represent any filter property difference?

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