PSI conversion table

You mean a conversion for "pounds per square inch" to a weight rating for tires?

 

I think he means like an air scale for weight. Our old trailers have air scales that the guage is in PSI, the new ones are in pounds.

 

Aaah, thanks. Had me confused there.

 

its actually a little different for every truck. The psi is based on leveling valves and since the air suspension has rubber blatters, diffent trucks have a slightly different surface area and this require a different PSI. It will actually change a little as the air bags wear out on a truck. Next time you have 34k on your drives read the gadge and then you know the max it can be. Mine is around 60 psi, but my last truck went up to 73ish before it was over 34k.

 

I do not believe a conversion table would work. I would not trust it unless I made the table. The only way to figure weight to PSI is to make your own. If you know 40K then record that and next time you weigh, record that weight and PSI again. You would have to find a table that is the exact match for your trailer, suspension, and angle hooked to your tractor to be close.

 

Not quite a conversion table... Lets take a Right Weigh like http://www.rwls.com/products/exterior-mechanical-load-scales which i have used for years without issue and infrequent calibration, it has a fixed scale that works off a single ride height valve and the resulting pressure in the air bags, no matter the size of the bags or the length of line or any other variable --except the valve-- ... so its more like a slide rule that takes the pressure in the bags and converts it to pounds of weight, so the scale would be correct but the differential would need adjusted, if the you weight at max weight and record max pressure shouldn't the scales "zero" point then be elementary? but how to generate the scale? perhaps its:

1. one scale for 2 axles 4 bags and one ride height valve, trailer or tractor
2. and one for 2 axles 4 bags 2 ride height valves also trailer or tractor
3. single axles with 2 or possibly 4 bags and one ride height valve, tractor or trailer, the #1 may double as this set idk

I think there aren't many scales needed but I am not sure if its 2, 4, or 6... we would not need to know any thing else except the "calibration" point usually the max weight for best critical point accuracy and the ride height valve configuration.

And the scale, of course.

the right weight is a good deal for what you get but is just a fixed scale with an adjustable max point, acculturate above say 65% of max

any ideas? till i am flush i wont be buying any scale systems and am only full of theory not practical data...

 

Yes. .... but after "zeroing" on a scale and then on your "table" it would be accurate till repaired or 8-18 months, yes? or more...