What If I ran a 540 RMP pump @ 1100 RPM?

[Iplayfarmer]

This is a hypothetical question...

I've got three speed settings on my PTO. What would happen if I ran a 540 RPM PTO pump at a higher speed...say 1100 RPM?

Would I get more flow less pressure?

More flow a the same pressure?

Just a big mess?

 

[SPYDERLK]

More flow, more pressure - assuming you have the power to spin it faster. You will want to have a good relief valve in the pressure line. Check pump pressure spec and set it below that. If its a hydraulic pump you should do some homework to assure it can handle overspeed w/o cavitation.
larry

 

[sandman2234]

Or shrapnel?
David from jax

 

[Mith]

More flow, same pressure I believe.
You might be headed for disaster though.

 

[Egon]

You should get more flow up to the fluid flow limiting sizing's of the pump. Maximum pressure should stay the same unless it is a PD type pump.

You may also want to consider a cage to catch all the pieces if it disintegrates!

 

[SPYDERLK]

You should get more flow up to the fluid flow limiting sizing's of the pump. Maximum pressure should stay the same unless it is [[[not]?] a PD type pump.

think you left out a word?
larry

 

[Iplayfarmer]

You should get more flow up to the fluid flow limiting sizing's of the pump. Maximum pressure should stay the same unless it is a PD type pump.

You may also want to consider a cage to catch all the pieces if it disintegrates!

Next dumb question: What's a PD type pump?

How is it different from others? Why would it make a difference?

I love this forum! I always learn stuff here.

 

[Egon]

PD = Positive displacement pump. If this type of pump is speed-ed up the increased volume flow resistance will increase the output pressure on an ongoing basis.

On a centrifugal pump this pressure will increase to a certain degree but stop increasing when the pressure limits of the vanes or stages are met.

 

[Mith]

My understanding of a PD pump was one that displaced a set volume of fluid per revolution, like a gear pump.
If this is correct then would it produce full pressure at any volume, the max pressure being set by the tolerance of the gear lobes.

 

[Wayne County Hose]

Your pump would probably cavitate then grenade.