Chemical metering device

[Kevin R Fisher]

I have a Cobb knock off machine....I have no chemical injection system on it.
It has an inline tap before the pump...what type of device do I need to add
so I can have chemical injection. So I can rinse with something other than
straight water when the occasion calls for it.

 

[bob vawter]

the little glass meter you see on most machines is called a Dwyers meter,,,,,
you can hook up a draw system to draw an emulsifier OR a rinse of your choice.......

 

[Shane T]

Do you have a fresh water tank or do you hook up to the house each time?

 

[bob vawter]

Doesn't really matter. ...
You use the pump "pull" to provide the draw on the system. ...

 

[Shane T]

Bob, won't the pressure from the hose bib affect the draw? I have a Dema 203B along with a flow meter to add to my extraction water. I use a fresh water tank.

 

[bob vawter]

Bob, won't the pressure from the hose bib affect the draw? I have a Dema 203B along with a flow meter to add to my extraction water. I use a fresh water tank.

Ain't that kinna a hillbilly way.....you don't need a Dema proportioner....
You use the Dywers to meter.....

 

[bob vawter]

I'm startin to worry about some of yous.....
She my emulsifier rant......

I talked to a supplier today....and we laughed and laughed. ....

 

[Shane T]

It came that way from Turbo Tech. I never tried it without the Dema. I'll give it a try, it may work better.

 

[Kevin R Fisher]

I have a 110 gallon fresh water tank...to machine with water box and float valve...a flojet pump feeds it fine.
Inline with the pump...they put a "Y" with a manual shut off....and that is it..I guess it is gravity feed to the pump......
...I don,t mind redneck solutions...in fact...i thrive on them.

 

[Shane T]

My PowerClean machine has a water box filled by a Flojet. It has a Dema 204C installed just before the box and a Dwyer flowmeter on the dash to adjust the flow.

 

[Jimmy L]

I thought about putting a quick connect on a dema valve ($25 at dultmeiers) and connect it on the front panel 's quick connect for your solution hose. Yellow tip at 1-8 dilution.

Whether that would work I don't know but I would try it. That way there is no cleaning solution going thru your pump.

 

[Mikey P]

I have a Cobb knock off machine

What does that mean?

 

[bob vawter]

What does that mean?

What a bunch a cowboys.....

 

[Mikey P]

seriously, is someone knocking off a C0bb TM?

 

[FB19087]

...I don,t mind redneck solutions...in fact...i thrive on them.

This is that solution



You slightly starve the pump by closing the valve a bit forcing the pump to draw from the chemical feed



You would be better off doing it the right way though

 

[bob vawter]

In my best Pulp Fiction voice. ...

Look at the brain on Brad....
errrrrrrr Fred!

 

[bob vawter]

HOWEVER you don't need that proportioner valve.....and don't forget the footvalve that goes in the jug
Or it will back flow and overflow yor Chem jug...
OPPS....I jus blew up the pic and see
The foot valve.....
Very good Fred.....nice work......

 

[GCCLee]

Your pump will siphon the rinse from the tank..... there is no need for all the extra bs these companies add ...

Like Bob said , don't skimp on foot valves... northern tool has brass ones with a glass ball in them that we use...

Simple simple simple

 

[Jack Zipper Zerkie]

I have a real Cobb unit and LOVE it anyway just replace it with a in line ball valve 1-4 inch size/ Connect both line and place the valve under the unit below the motor. You control your flow by setting the valve at your setting. wide open of closed for just fresh water only. Works great about 4 years now and no problems. jz.

 

[Lee Stockwell]

Where's Larry when he could be very useful?

 

[Mikey P]

Sulking..

 

[Jim Williams]

Bob is pretty smart for an older gentleman.

 

[ronbeatty]

Bob is pretty smart for an older gentleman.

You have to be young and stupid before you can be old and wise

 

[CJ-FL]

Yo

View attachment 78696

This is that solution



You slightly starve the pump by closing the valve a bit forcing the pump to draw from the chemical feed



You would be better off doing it the right way though

You can buy a Dwyer with the flow meter (all one unit) so you don’t starve The pump as you limit the solution feed. It’s on “that side of the T fitting”. If that makes sense.

 

[FB19087]

Yo

You can buy a Dwyer with the flow meter (all one unit) so you don’t starve The pump as you limit the solution feed. It’s on “that side of the T fitting”. If that makes sense.

Meter is on the diagram. Starving the pump is what causes it to make up the needed water via the chem input. The pump isn't actually starved though.

Can you diagram what you mean?

 

[Kevin R Fisher]

mr. cobb has ex-employees ...like everyone else..
a guy that used to build machines for him...can weld like a wizard...quit cobb and now builds and services machines
he has his own shop.....go craigslist dallas.....carpet cleaning machines...he runs an ad all the time...Im about 80 miles from him
he could help me I know ...I just wanted to see what ideas you guys had for a make shift injection system.

 

[Kevin R Fisher]

pic

 

[Kevin R Fisher]

pic

 

[Kevin R Fisher]

the previous pic shows the Y off the line going into the pump...this was the machine when I got it.
I hired Cobbs ex employee to build an new exhaust manifold ...move the pressure regulator to the front of the machine.
machine works good....I just want to add an injection system...i mean it pulling a # 4 blower and the same general pump cobb puts on his new machines
.....for $2,500....it works...not fancy like a butler...but...what areas it lacks in ...I make up for when I pull the T-Rex off the trailer.

 

[Jack Zipper Zerkie]

Looks like that unit was built Larrys dad Mr Cobb many years past. I have the base 2045 about 8 yrs old and it runs @ 240 water temp atm. The units does what it was made for and is good at it. Ive had other units much more costly and caged and hard to repair. The only other unit like Cobbs is in Largo Fl & is Johns Truckmount repair now run by Don in Largo. Its your choice and your money so. We all have to start somewhere to learn but it can get expensive in the learning process . jz.