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Flushing flange and flushing ring are different

Introduction :- Flushing  Flange/Ring is used after diaphragm seal to clean the diaphragm seal when viscous fluid could clog near diaphragm membrane.
Some other words are calibration ring, flushing ring, drip ring etc

Flushing ring :-

​It is like cumber that gets sandwiched between two bread slice .

 It gets sandwiched between diaphragm seal flange and process flange

​Refer the pic NO BOLTS GO THROUGH the ring !!!!       
    
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Flushing flange:-

It is also sits between diaphragm seal flange and process flange BUT the bolts go “through” the flange.

​As the bolts can go through the flushing flange so there is better stability etc.
Picture
​Obviously there is trade of between choosing flushing flange or flushing ring like cost, stability etc.
 
Or sometimes client design bases/preference dictates when to use flushing flange or ring.
 
Credits :- The flushing flange pic from Badotherm
control_valve_mastery_rev_e1.pdf
File Size: 1525 kb
File Type: pdf
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