Anyone pulling maximum vacuum? 28",29"? I have questions.

[michiganfarmer2]

IM using an air cooled piston pump. I have 1500 taps. Im only pulling 22". I want 29", but I dont want to spend the $8100 that Leader quoted. Are you using rotory vane, or liquid ring? How many taps? Are you using an oil reclaimer? cooler? WHat brand and model pump? Did you design your own cooler? How much oil will a pump consume without a reclaimer?

[shane hickey]

WUnless im mistaken 28" is max on vacuum
I always have the gauge at the end of the main
Line and i doubt theres 28"at the end.

[spud]

[QUOTE=michiganfarmer2;199580]IM using an air cooled piston pump. I have 1500 taps. Im only pulling 22". I want 29", but I dont want to spend the $8100 that Leader quoted.

Unless you have a two stage pump you will not be able to get 28-29 vacuum. A single stage pump is only good for about 25 inches of vacuum.The highest vacuum one can get at sea level is 30 inches (using a two stage pump) and then it drops one inch per thousand feet in elevation. My sugar house is 500 feet above sea level and I get 29.5 at the pump with my two stage pump. In the far ends of my woods the elevation goes up about 750 feet and the most I can get for vacuum is 28 on a clear day. It has been said that for every inch over 20 you can get another gallon of sap per tap hole. If this is true then by replacing your pump that only puts out 22 inches of vacuum with a pump that could give you 28 inches (depending on your elevation) you could get 6 gallons more sap per tap. With your 1500 taps that would give you 9000 more gallons of sap making you 209 more gallons of syrup. If you sell your syrup for $40.00 per gallon you would make $8400.00 more per season. Your new pump would pay for itself the first year. You would not need to spend $8100.00 for your size operation. You can buy a nice two stage pump at any other maple dealer for about $5000-6000 that would fit your size operation.

Spud

[Mark]

What type of extractor are you using? I run a two stage Sihi and have found that you can have problems with the extractor at high vacuum.

[michiganfarmer2]

What type of extractor are you using? I run a two stage Sihi and have found that you can have problems with the extractor at high vacuum.A gilles-bernard, double verticle, mechanical.

[michiganfarmer2]

[QUOTE=michiganfarmer2;199580]IM using an air cooled piston pump. I have 1500 taps. Im only pulling 22". I want 29", but I dont want to spend the $8100 that Leader quoted.

Unless you have a two stage pump you will not be able to get 28-29 vacuum. A single stage pump is only good for about 25 inches of vacuum.The highest vacuum one can get at sea level is 30 inches (using a two stage pump) and then it drops one inch per thousand feet in elevation. My sugar house is 500 feet above sea level and I get 29.5 at the pump with my two stage pump. In the far ends of my woods the elevation goes up about 750 feet and the most I can get for vacuum is 28 on a clear day. It has been said that for every inch over 20 you can get another gallon of sap per tap hole. If this is true then by replacing your pump that only puts out 22 inches of vacuum with a pump that could give you 28 inches (depending on your elevation) you could get 6 gallons more sap per tap. With your 1500 taps that would give you 9000 more gallons of sap making you 209 more gallons of syrup. If you sell your syrup for $40.00 per gallon you would make $8400.00 more per season. Your new pump would pay for itself the first year. You would not need to spend $8100.00 for your size operation. You can buy a nice two stage pump at any other maple dealer for about $5000-6000 that would fit your size operation.

Spud 2 stage pump.... I think that is what I needed to know. I will find out what my elevation is. I really appreciate it. THANK YOU!

[michiganfarmer2]

ok. Elevation is 600 feet

[Mark]

A gilles-bernard, double verticle, mechanical.
You may have problems with the float rods freezing up if any air can get in around the rod. The best for high vacuum is a submersible pump inside the extractor.

[philkasza]

We have a liquid ring tuthill 20 cfm pump that will pull about 27in at the pump, we also have a 75 cfm robusci? liquid ring and we can pull a little higher vac with that. I guess they are only single stage.

Sam

[michiganfarmer2]

THank you very much everyone.

[michiganfarmer2]

You may have problems with the float rods freezing up if any air can get in around the rod. The best for high vacuum is a submersible pump inside the extractor.Oh, right! I forgot abuot vacuum creating temperature drop. THank you!