I have used Gast 3040s which are similar and oil less. I have run mine for several days in a row, but make sure you have a regulator so it doesn't run dead-headed during freeze ups. The 3040s run off a belt connected to a 2hp electric motor as opposed to close coupled like the 2567. There were times when I had to run a window fan at the pump to cool it down, or else the motor would trip its internal breaker. Lots of cfm and decent vacuum, but its not a pump that I would try to run for weeks at a time like during freeze ups or long term warm ups. For that I would go with a liquid ring pump, oil or water cooled. My disclaimer is that I have never used a 2567 so your results may vary. Oh, and they are LOUD.
EDIT: Im not sure if Jim Brown is still on here, but he used to use 2567s I believe.
Last edited by heus; 04-05-2021 at 08:55 AM.
1000 taps on vac down to 100+ buckets 99% sugars
2x5 SL Hi-Output Raised Flue Corsair evaporator
SL Short bank press with CDL diaphragm pump
Leader Micro 1 RO for 2024
Constantly changing
2010:36 gal 2011:126 gal 2012:81 gal 2013:248 gal 2014: 329.5 gal 2015:305 gal 2016:316 gal 2017:258 gal 2018:147 gal 2019:91 gal 2020:30 gal 2021:30 gal 2023:50 gal Total since 2010: 2047.5 gal
Tapping the same trees my great, great and great grandfathers tapped.