RE: [compost_tea] Pressure & critters

From: Mike Bosko <mjbosko_at_jmtsystems.com>
Date: Fri, 25 Jul 2003 17:39:28 -0700

Interesting Bob. From your description, I'm picturing something like the
small hose attachments that make for a pressure sprayer attachment, like
those that you can pick up at your local hardware store?? Not sure I have
it pictured correctly tho, and also not sure what you mean by cross section
pipes. Can you help by explaining your concept again, from a little
different view?

I'd like to understand what you mean.

Thx, Mike


-----Original Message-----
From: Robert Norsen [mailto:bnbrew_at_yahoo.com]
Sent: Friday, July 25, 2003 4:50 PM
To: compost_tea_at_yahoogroups.com
Subject: RE: [compost_tea] Pressure & critters

Mike and All I've been trying to say this for a while. Large cross section
pipes allow the little ones to travel slowely even under high pressure.
Transition into a smooth small diameter hose. 1/'2" or 3/'8" The 'gun
should be selected to have largest possible innards so the velocity is low.
Finally the jet. The jet can be a straight ahead open hole. cut accross
the hole is a vee cut that allows the pressure to escape to form a flat fan
shaped spray. No sharp turns except that last one. Lower pressure will
slow the impact during this last part of the trip.

But the spray operator is going to want to have choices of spray shape.
Dont know how to handle that.

I'm with you Mike Hitting the leaf seems like the nost gentle part of the
trip. Bob


Mike Bosko <mjbosko_at_jmtsystems.com> wrote:
Seems to me that theyre getting splatted against things immediately before
leaving the sprayer thats how the sprayer works. Pressure builds up in the
tank, and then the water hits a fitting at the end of the hose connecter
that in turn, makes the spray fan out and maintain pressure. I cant
imagine how that could be any better than flying through the air for a while
and then hitting a plant even if it were a jet stream, it seems better than
what the sprayer nozzle does to them little critters.

Maybe Im thinking about this too much again, I dont know.

-m

-----Original Message-----
From: Jeff Lowenfels [mailto:jeff_at_gardener.com]
Sent: Friday, July 25, 2003 2:32 PM
To: compost_tea_at_yahoogroups.com
Subject: Re: [compost_tea] Pressure & critters

Pressures up to 70 PSI are what you can expect from a pump sprayer. This is
fine for the microbes. The problem is the velocity at which they hit things.
That is where you need to be most careful. Splatted microbes are dead
ones....Spraying is an art.

Cheers,

Jeff




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Received on Sat Jul 26 2003 - 00:37:35 EDT

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