# What determines the Rotational Speed of a Surface Cleaner, PSI and/or GPM?

What determines the Rotational Speed of a Surface Cleaner, PSI and/or GPM?

The pushing force of the water coming out of the nozzle is a combination of psi/gpm, also the angle of the nozzle can hugely impact rotational speed, and a quality swivel will spin faster. I think that’s about it but maybe I’m missing something.

Does PSI affect the rotational speed more or GPM does? I personally think that PSI affect the speed more than the GPM.

I think the answer is a basic physics question…something like Force=mass x acceleration. Its been too long since I’ve taken physics but my hunch is GPM and PSI effect the pushing force proportionally (or “equally”).

If you don’t squeeze (no PSI) a full tube of toothpaste, the toothpaste won’t come out(no flow/GPM). If you squeeze the tube gently, a little bit of toothpaste will come out. However, if you jump on the tube hard enough (high PSI), I think most if not all the toothpaste would come out(maximum GPM). So, I think that the higher the PSI, the higher the GPM, which leads to a higher rotational speed.

GPM is whatever your machine puts out

PSI is controlled by tip diameter

Rotational speed is a combination of both

Whats your name and where are you from?