12v control valve

[outback]

And I thought if I got one reply to this I'd be happy.


Scenario is this.

I am operating a machine whilst travelling, don't panic I'm
only going 15km/Hr. The fluid I wish to control the flow of is basically water with some dye and a few other non dangerous bits in it.

At present if I need to vary the flow, I gotta stop, get off machine adjust get back on start off, all a pain in the bum. So of course what happens is I put up with non-ideal amounts, not the end of the world but too little means I'm sorta wasting my time, too much and I'm wasting $$$$. What I want is a toggle to go up a bit down a bit back a bit etc.

The volume we're talking is mind blowing, probably 15 L/min. max As for pressure, I dunno, bugger all I guess. The current setup is just a 1/4" or 3/8 " manual valve. I had thought of whacking a stepper motor on it. Also I can get really slow 12v motors, but attaching to the current valve has me stuffed.

As you can see, anything industrial is overkill. Simple cheap and effective, that's what we're after.

[Dan]

If the valve is a ball type (1/4 turn open/close) then a windscreen wiper motor and gearbox would drive it (with a linkage).

[himzol]

The fluid I wish to control the flow of is basically water with some dye and a few other non dangerous bits in it.

:confused:

OK,

If you don't want to tell us,

Try these guys, http://www.oceancontrols.com.au/moto...ontrollers.htm

As for how you atach it depends on the valve assembly,.

Himzo.

[doug1]

If you use the previously mentioned quarter turn valve you could rig a brake cable arrangement to it and set it with a handle from a set of bike gears all able to be scrounged from junk bikes

[RETIRED]

Why not just position the quarter turn valve where a solid rod can be fitted and operated from the drivers seat like on the old road water sprayers?

Or move the tap inside like fire trucks have for their front spray bars?

[outback]

Can't use the rod Idea, too far, and I'm in an enclsed cab.

I have thought about putting the valve in the cab. It is certanly the easy option. I am just worried if it ever leaks I'll end up with bright red everything, and this stuff doesn't wash out too easy.

[Cliff Rogers]

OK, what about using a DC bilge pump to deliver the graffitti & control the flow by varying speed of the pump motor?You'll get something like that from caravan &/or boating supply places.

[outback]

The pump does two operations so I can't vary its rate.


I have it worked out, I can get a slow 12v dc motor, gear it down a bit if I need. A mate has just offered to make a coupling from a 4mm motor shaft to a 6mm valve shaft, way beyond me, but he says no worries.

Thanks for all the help, I was worried I had mised an obvious cheap and easy and cheap fix.

You guys are so clever.