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[ROOT]/includes/bbcode.php on line 112: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4752: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3887) [phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4754: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3887) [phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4755: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3887) [phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4756: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3887) Tractorsport Flowbench Forum Archive • View topic - DP across the orifice
What test depression are you planning on using? How much power do you have in your bench? Motors Etc. Are you planning water gauges or electronic? How sensitive do you what your bench to be? What is your expected max flow requirement?
I'll second what Tony is saying, I can confirm this while working with the water gages on my bench build. Higher Dp makes the gages more stable. I've been working with 6" but plan on doing some tests this coming week with a tad higher Dp's for comparison.
"There is no more formidable adversary than one who perceives he has nothing to lose." - Gen. George S. Patton
That 1-2 CFM difference between the smaller and larger ranges, at the same valve lift, is very normal with analog guages. Actually, you're bench appears to be working very well.
So if I follow correctly, the way to basically change the Dp across the orifice is just to change the slope on the inclined manometer and calibrate the orifices for that WC as in 12" rise compared to a 6" rise. Am I correct in assuming that?
"So if I follow correctly, the way to basically change the Dp across the orifice is just to change the slope on the inclined manometer and calibrate the orifices for that WC as in 12" rise compared to a 6" rise. Am I correct in assuming that?"
Agree, then your flow will go up 41% higher for the same orifice size. Raising the DP to 13.5 from 6" makes the flow change from 300 cfm (for example) to 450 cfm. A 50% increase.