1st i would like to start with chemical injectors , down stream injectors or venturi valves , What ever you call them in your city, or country there all the same in theory.
As you will see above this is the run of the mill down stream injection valve, There are a few things to take in account when buying and installing these, 1st is that they normally has a ratio or size of pump they will work on , This one has 2-3GPM gallon per minute as my machines are all 6 GPM i could not use this exact one so make sure you check your pumps and buy the right ones. At Wash Rite we only have the one size of pumps and all the same make and model this allows us to stock parts and equipment with ease.
Also the valve will only work when fitted facing the right direction. As you will see on the pump there are arrows facing one direction, This is to show you the direction of the water. So as you see above the pump side would be on the right and the hose real side will be on the left. You can fit the valve anywhere in your system but it must be after the pump never before the pump.
A great video to watch on this would be https://www.youtube.com/watch?v=i7x5hLxo21s
The next piece of equipment would be the unloader pictured below.
The unloader does a few things and if set up well should do them very well without issues, You mound the unloader directly after the exit side of the pump on the high pressure side, than you mount your chemical injector or high pressure hose on the direct other side where its marked "out" The port that says "bypass" you connect a return line to your tank, The return line is not high pressure so no need for high pressure hose on the bypass.
Now you have to set the unloader, How i do it is i get a high pressure tip in my lance start the machine and while its running i get a friend to screw down the nut and i can feel it build pressure in my hand through the gun, As soon as the pressure stops building i get my friend to turn the nut back 1 half turn and now its set just a tiny bit below its max pressure which is where you want it, Some people do it with a pressure gauge and this link will show you how they do it. https://www.youtube.com/watch?v=aWcdl3f1gaw
These are the two pieces of equipment that my guys at Wash Rite have had trouble with in the past week while doing house washing.
Hope this helps the new guys out there
Troy Hillard
Wash Rite NZ
Pressure washing Bracknell Berkshire
ReplyDeleteThe blog is good enough, keep up writing such type of posts.
Very useful info. Hope to see more posts soon!. building the peninsula one aventura For Sale
ReplyDelete