PTS Flowbench Forum

Is this because the SF benches are rated for 25" of water?

Based on the new literature the sf600 is 500CFM @ 36" and 600CFM @ 20" Not 25" but if you look at the specs tab on the website it stated 25"

I think what bothers me most is that this bench on #5 acts like a bench with a 3.059 ID plate at 13.37 DP with .6014 CD flowing 450CFM and the the digital monometers support it and so does the math if you use the % scale * 450.

Rick

Why did you post a pic of the chart?

Because i was questioning how could this be?

Chad that is just messed up from intake to exhaust the cd is moving from .591 to .648?????

Is your bench a 600 of 600S and is there a Diff?

Rick

1960FL wrote:Because i was questioning how could this be?

Chad that is just messed up from intake to exhaust the cd is moving from .591 to .648?????

Is your bench a 600 of 600S and is there a Diff?

Rick

It's a 600, not sure if there is a difference.

I posted the picture because I also think it's messed up!

Chad Speier wrote:

150.1 X 80.1%. Where the heck did the 150.1 come from? OMG At least use the posted range value in the example.

Here's a pic of the chart off my SF600 w/ Flowcom. Not sure how SF calcs the different CDs. All the SF benches I've seen though have a similar chart, so there must be some method to their madness...

Here's a pic of the chart off my SF600 w/ Flowcom. Not sure how SF calcs the different CDs. All the SF benches I've seen though have a similar chart, so there must be some method to their madness...

Yes there is; It is the Socialistic model of Flow Benching Kind of like Equality among students, the Dumbing down of flow bench data my god we can't have some head porter do better than his competitor...

So you have a flowcomm and how the hell do you calibrate it ????

Rick

1960FL wrote:

Here's a pic of the chart off my SF600 w/ Flowcom. Not sure how SF calcs the different CDs. All the SF benches I've seen though have a similar chart, so there must be some method to their madness...

Yes there is; It is the Socialistic model of Flow Benching Kind of like Equality among students, the Dumbing down of flow bench data my god we can't have some head porter do better than his competitor...

So you have a flowcomm and how the hell do you calibrate it ????

Rick

Rick, no need to get all worked up.

The SF benches come with the calibration data for the orifice plates. They are different from bench to bench and you plug the flow range of each plate into the flowcom. That's it. The flowcom can be taken from one bench to another. I'd imagine it's no different than what an FP1 or PTS manometer would be used for. It does have temperature compensation, I'm not sure how much of a difference that makes.

I have a set of PAP and a 400cfm plate that Bruce made, so I can see what those read later. On the SF300 the 100 cfm plate read 97, the 200 cfm plate read 195 and the 300 cfm plate read 291. I imagine the SF600 is pretty close to the same. Even if the plates read the same, that's no guarantee that benches will read the same. You saw the thread on ST where the two heads were shipped around the country. Results will vary!

Ahhh, thats normal. But a smart SOB.