Hydraulic tank suction discharge size?

[moose13]

I am building a log splitter and will fabricate my own hydraulic tank.
I am still waiting on parts but was was wondering what size to make the suction and discharge ports in the tank? I see the pre made ones have a 1.5 or 2" suction, but all splitters i have seen are necked down smaller. Also any suggestions for tank size? I know the bigger the better for cooling, what would be adequate?
And any suggestions on where to put the ports, i would imagine the suction would go towards the bottom and the return would come in close to the top?
I have never done this and want to make it right. I am using a 200cc Honda engine with a 13.6gpm pump.
Thanks for your replies!

Moose13

 

[AKKAMAAN]

I see the pre made ones have a 1.5 or 2" suction, but all splitters i have seen are necked down smaller....... a 13.6gpm

1.5" will make a fluid velocity of 2.5 ft/sec, max recommended (Parker recommendation) is 4 ft/sec.

Minimumu size would be 1.25">> 3.6ft/sec

It also depends on "bends", elbows etc...

Go 1.5"...

 

[moose13]

I have a 20gpm filter and housing ordered, this goes on the return side?
Do i also need a suction strainer? Thanks for the help i am clueless.

 

[moored4]

I would put a strainer on the suction side and also the filter! Just dump the return stright to the tank. I would need to know more about your system before recomending a cooler or not

 

[AKKAMAAN]

I have a 20gpm filter and housing ordered, this goes on the return side?
Do i also need a suction strainer? Thanks for the help i am clueless.

No filter on suction side ever, have to be on return line...I would skip suction strainer too, but go for a fill cap strainer...

If you start with a clean system, this is the way to go, just monitor pressure drop over the return filter, get a housing with built in indicator...

 

[moose13]

Thanks!

 

[SSdoxie]

Reservoisr should hold at least 1/2 of GPM pump flow. The more oil in resevoir the better the cooling without external cooler. Reservoir needs have room for expansion. I,E, If have 8 gallon in reservoir it should be larger enough to hold 10 gl. The retrurn MUST be retruning oil well below the oil level, better to put down low and away from the suction outlet. Return dumping in close proximity to the outlet or dumping into air in top of reservoir will create cavitation. Example: Outlet is at front right lower corner, put return at rear left lower corner.

 

[J_J]

With all due respects, the logic on what size hose should be based on the the pump and valve inlet and outlet size, especially on a short run of hose. If you want to go larger, that is up to you but the fittings and hoses will be more expensive.

13 GPM two stage pump.

Port IN hosebarb for 1" ID hose.
Port OUT 1/2" NPT

Just use some logical conclusions.

 

[IceStationZebra]

One thing to consider is the ambient temperature you will be working in. If you will cold start the machine in sub-freezing temperatures often you should err on the conservative side so you pump lasts longer.

Another suggestion - don't use sharp 90deg bends in the suction line if possible. You can often utilize a sweep fitting if you can't get the hose to bend tight enough without kinking.

ISZ

 

[moose13]

Thanks for the replies, after even more research i am thinking i should use a baffle in the tank as well? Makes sense to me.