Sizing air system for drill - The Combine Forum
 
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post #1 of 4 (permalink) Old 04-17-2019, 12:42 PM Thread Starter
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Sizing air system for drill

I have a 24' concord and the factory air system is a pain. It has two 24 run primaries and no secondaries.
I am thinking of switching to a raycol system with two 4 run primaries and eight 6 run secondaries but am unsure about sizing the primary outlet hose diameter. The primary inlets are 125 mm.
I would guess that 50mm is enough for the product without being to large and running out of air?

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post #2 of 4 (permalink) Old 04-18-2019, 10:28 AM
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So it's a double shoot 12" space? Or single shoot 6" space?

Is there a 125mm hose from the cart for the seed and another for the fertilizer?

A 125mm (5") hose has a cross section area of 19.6 sq in and a 2.5" hose has a cross section of 4.9 sq in. The velocity would be about the same in both hoses.

Four 2.5 in hoses have the same area as one 5" hose.

My BG has a 6" primary hose feeding six 2.5" secondary hoses. Then going to six 10 run manifolds with 7/8" id hoses to the openers.


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post #3 of 4 (permalink) Old 04-18-2019, 10:32 AM
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Raycol makes a great distribution set up. All stainless and built to your spec. The sky is the limit with what you want to build.. You wont run out of air with bigger secondarys IMO. Get them to make you 2" ports and run 2" hose. The 2 1/2 these drill companies use is wayyyy to expensive. You will only be moving 6' of product / secondary. As times goes on you may upgrade your drill and want to think of using these again so don't cut yourself short.
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post #4 of 4 (permalink) Old 04-18-2019, 10:33 AM
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It is important to match the cross sectional area of the hoses when going from one stage to another.
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