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Adjustable orifice symbol

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lunchim

Mechanical
Joined
Jan 13, 2008
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TH
Could anyone advise me what is the symbol for adjustable flow orifice? Based on ISA standard, can I just put the arrow across the normal flow orifice symbol?
 
Please clarify the function of the variable orifice device. Is this a flow measurement orifice with quick change fitting or something more like a needle valve? Manufacturer and model number might help to clarify the device, thus permit a rational response?
 
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