Rotational direction for Scaife & Sons pump?

Scaife & Sons pump

Scaife & Sons pump

In the ten days it has been posted, I appears I have garnered no responses to my question at
The questions is this: In the absence of compressor system's original motor, how do I determine which is the correct way to rotate the pump? I can only assume that the v-belt pulley on this pump needs to turn counterclockwise, i.e., in the direction that would cause the fan-blade-like spokes of the pulley to push air past the head of the pump to help cool it during operation. Is that a reasonable assumption? Thanks.

(The manufacturer, model, etc., is described in the post.)


Comments for Rotational direction for Scaife & Sons pump?

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May 28, 2014
by: Carls421

Thats right, if you think of how an aircraft wing is, its bigger at the front than the trailing edge is, air leaves the thinner part of the blade faster and moves over the head of your compressor thus cooling is increased

May 27, 2014
Blades are uniform in section
by: Alan

I appreciate the comments. (I'm the owner of the pump.) The spokes of the pulley, which I suspect are meant to act like fan blades, are in fact uniform in thickness, i.e., they're not airfoils; they're simply angled across the plane of the pulley.

May 26, 2014
by: Doug in

I tend to agree: But -

It looks like the blades are tapered, or thinner, at the pump side of the flywheel. If that is the case, then I'd go for cw rather than ccw.

May 26, 2014
by: Carls421

Hi, yes that is correct, the air pushes over the pump and cools the pump

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