Coating spraygun

what is usual diameter of coating spray gun nozel?

1.2mm, 0.8mm

its the diameter of needle or hole?

Gun Hole

usualy gun hole is 2 mm needle is 1 mm.

what should be the distance b/w spray gun & coating pan?

distance between gun and tab bed is usually 7-10 inches.
vary acc to product validation.

If I m not wrong the pilot gun diameter size is 0.5 mm

0.8 mm

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Why We are doing postwetting and prewetting with Peptone Water in Membrane filtration method

different sizes .8,.9