Surge SP 22 info needed

[latewood]

Recently acquired a vacuum pump(surge sp 22) ,I cannot get any info online(google,MSN etc. search engines). Anyone have any ideas as to where I could get a manual or spec sheet for this particular pump. Been making maple for 39 years now and figure its time to try and see if vacuum really does help increase production. Most of my bush is on a very steep slope,and has some natural vacuum already. Thanks-----

[brookledge]

Go back under vacuum section under Delaval pump heads cfm page 2 there is alink to vacuum pump ratings the sp22 needs a 1.5 hp motor and rotate at 400 rpm. will give you 9.5 cfm at 15". I would say that by the time you ran it at 20" you would have about 4-5 cfm so the pump would be good for 400-500 taps. You need 1 cfm per 100 taps. Most manufacters recomend 20" but some old pumps will not handle that much without heating up too much so could run at 15-16". If you have alot of taps you will need a bigger pump to make it productive.
Keith