Sihi 2 stage question

[madmapler]

I have a sihi lohe 25309 2 stage pump that I'm trying to connect to a gas engine. The one I have has a crossover pipe on top but when I go on the sihi site they show one without it(same number minus the e- loh 25309). My main concern is finding the correct RPM for this pump. I assume there was a design change somewhere along. The correct rpm for the pump they list is in the 3400 range. I have a smaller sihi 2 stage without the crossover pipe that is rated for 1/2 that(1700rpms). The 25309 is a 3hp pump. Thanks for any assistance.

[madmapler]

Still looking for replies.

[Thad Blaisdell]

CDL sells them.... give them a call and ask 527-0000

[WMF]

Madmapler,
If you look up the pump on the Sihi/ Sterling website it directs you to a pdf. of this pump with a picture of a pump with only two ports. If you scroll down to the pump diagrams it shows the 25309 specs and it does have four ports with crossover but the two smaller pumps are two port. 3600 rpm but could be run slower with reduced capacity.
Being 3600 rpm this pump is ideal to mount direct drive to about a 10hp gas engine turning at 2800 rpm.

[madmapler]

Thanks guys. WMF, you're right. I found the page with the 25309 by itself. You would think they would have made that distinction earlier. Thanks for researching it.

[WMF]

This pump can be used for vacuum or as a compressor. About 3hp with vacuum or 5hp needed as a compressor. A 6.5 hp gas engine would run it for vacuum use. Are you mounting it for direct drive?

[madmapler]

I'm running a 6.5hp with it this year. Next year I'm hoping to have electric. I'm running it with pulleys(6" on both) with an idler on a lever in between them. This way I can engage and disengage the engine. Its kind of a large platform because I had to locate the pump on the other side of the belt to get the rotation correct. It will sit atop a cage tote nicely though and thats what I'll be drawing my cooling water from. Next year I'll use a lovejoy coupling if I switch over to electricity. I'll have 1200+ taps on it.