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Syrup pumping - relief valve

10K views 15 replies 9 participants last post by  sjvbee  
#1 ·
I have most of the materials for the syrup pump system, except pressure relief valve and the hose that goes after the pump. I don't know what the PSI rating has to be on pressure relieve valves. At what pressure do they have to open? I see online some are rated at 30, 50 and over 100 psi. I have 1" gear pump and the piping will be 1". Any suggestions on the discharge hose will be appreciated.
Thank you.
 
#2 · (Edited)
It depends on the pump, some pumps (like mine) do not even need a pressure relief valve. The manufacturer can tell you this.

To get syrup down a I inch pipe, say 20 yards long, you'll probably want more than 30 psi to get decent flow. Every set up is different though cos it depends on the pump type, hose and length of hose. Mine runs at not quite 50 psi and has good flow through a 1 inch ID hose 12 yards long. So if you wanted to achieve something similar, you would install a 50 psi relief valve. If your hose is longer you may need to move up, but it also depends how the pump works, mine is impellor.
 
#3 ·
I am using a 5 foot piece of garden hose for my relief and my feeding hose is a 3/4"x 50 feet. I have a 1" rotary gear pump with a 1/3hp electric motor and I have a small generator to plug my motor into. I adjusted my relief valve by looking in the tank and watching the flow come out of the feed hose and the relief line. I bought the relief valve at Tractor supply. Good Luck
 
#5 ·
That's handy to know, only ever seen fixed value relief valves never knew adjustable ones existed. It could be of benefit if using varying hose lengths or making other changes, give flexibility to easily do whatever you want.