Anyone using an SP-22

[gbilek]

I recently purchased a Surge sp-22 to replace my surge rotary vane pump. I am trying to pull 24 in of vacuum with this pump.

Does anyone know what is the required HP for an electric motor to drive the pump? I obviously what to use as small a motor as possible, but I need it to be reliable as well.

Also, does anyone have a recommended rpm to turn the pump at?

[tuckermtn]

the Surge chart reccomends a 1.65 hp electric motor with a 14" pulley on pump and 3.5" pulley on motor. If you want to turn it slower, they also say you can run a 1.10 hp motor with a 14" pulley and 3.25" pulley.

getting 24" out of it might be pushing it...run good oil in it and put a box fan on it and you might be okay...

[Russell Lampron]

Does your pump have the original pulley on it? The original pulley has spokes that are tilted like fan blades to push air over the pump head. You want a motor that turns 1725rpm not 3450rpm to use the stock pulley sizes. The pump head should turn at 400rpm. If you have the fast motor you will need a larger pulley on it to get to the 400rpm pump speed. I pull 23" with mine and it handles it well without an additional fan. I have a 1.5hp motor on mine.

[gbilek]

Thanks for the info. Yes I have the origonal 14 in pulley. I do have a heavy duty 1hp baldor 1750 rpm motor that I was hoping to use. 400 rpm at the pump should mean a 3.25 in pulley on the motor. The guy that I bought the pump from was insistant that I use mobil one synthetic automatic transmission fluid.

[tuckermtn]

I have used amsoil compressor oil with good luck...

I run a 1 hp on my sp11, but I bet you will be fine with a 1hp on the sp-22

[Russell Lampron]

I run Dexron lll non synthetic ATF in mine. I change it often and haven't had any problems.