A 2.044 plate would be set to flow 293.7 cfm on my bench. (13.29 x DIA²) x SQROUTE of test pressure.
It's the 300 cfm PAP I bought as a set from Bruce.
That doesn't mean anything. You have to measure it, and find out what it should flow. Again, it's math. This is why most of his plates have a diameter on them.
Last edited by Chad Speier on Fri Nov 25, 2011 11:50 am, edited 1 time in total.
It flowed 334.2 cfm @ 25" w/FP
It flowed 73.4% manometer @ 422.2 = 309.9 cfm
Chad did you mean to use 442.2 your range calibration
73.4% * 442.2 = 324.6.
Please help me here but in this quote,
The values for all ranges are shown on the Calibration Data Card mounted on your SF-300/600
flowbench for 25” (60cm) of test pressure.
Important Note: The SF-300/600 flow ranges are based on a test pressure of 25”(63.5cm) of
water. If other test pressures are used, the flow scale calibration ranges should be corrected by
the following amounts.
I read this as they say there calibration number in your case #5 442.2 is derived at 25" test pressure.
What does it say next "Following amounts"
Rick
Yes I typed the wrong amount, I since have corrected it.
The following amounts are what Gerald posted as well.
No diameters marked on any of the plates, maybe it's on the newer ones. I did buy the PAP set a long time ago though, want to say in 2004 right after I got my SF300. The 400 cfm plate came later, 2006-2008. Had a sticker on it, but no diameter etched/marked on it.
Chad what CD are you using in your calcs on Bruce's plates?
The numbers I quoted here were from the original spreadsheet from the Ford bench. The formula I use is based off a .620 sharp edge plate, however the other inputs are different. This is a formula that was given to me 20 years ago and I have just always used it. I will need to dig to find what the differences are in the formula.
Yes, the manometers and calibration of the SF is in the weeds. I said it, again!
