Float Valve is Squealing

As the subject implies, my float valve is squealing whenever my rinse tank has to fill. It still appears as though everything is still working and filling up good. I think it might be the diaphragm? I was just wondering if anyone had any input?

Sidenote: We have had some really cold weather lately and I turned my weep pressure up from 20 psi to around 30 psi. I don't know if that would affect it or not.

We have used a Hydrominder 571 to fill our rinse tank in the past. A few times the valve would either squeal or even vibrate. After taking it apart, it was definatly the Diaphram. We did repair a few of the valves but found that the repaired valve wasn't as dependable as a new one. So when there were any problems with a fill valve we would always replace it with a new one. As far as our dilution valves (such as a hydro 511 0r 515) we have had great success repairing those.

Since I have only had the wash a few months I think I will probably replace it with a new one and keep the old one for parts. I think I have the walters valve and to replace it would only be like $40.

I have a hydrominder that has the stainless chimney like housing(not sure what model it is, or what it is called), but it just started leaking water out of the top cap. Anyone know if this is repairable, or if I just need to replace it?

It's probably the anti-siphon valve on the model 511. You can just remove all the plumbing to it and screw the eductor right into the bottom of the black body. It serves no real purpose in a commercial application since you likely have a backflow preventer on your water main.

I would recommend drilling a 1/8" hole in your drop tube below the inductor. Locate the hole above the water level but below the top of the tank. While filling, the solution will spray out into the tank, but if it tries to backflow(footvalve sticks) into your concentrate it will suck air and lose vacuum before diluting your expensive chemicals.

I don't trust those backflow preventers. I also put in line check valves on the draw side of the inductor. Cheap insurance for saving chemicals and consistency.

Check out pic...my hand is about where the hole should go.
This is a double inductor(green) with micro-tips and no anti-siphon or backflow preventor.

The valve I have is located here:

http://www.dultmeier.com/catpages/E0028.gif

It is the water master in the lower left corner. It is not really affecting the filling of the tank, but I am thinking I should get one just to have one on hand for when it goes out.

It's not all that unusual for them to make noise, but it's definitely good to have at least one spare. I keep a new one and one rebuilt along with a couple extra diaphragms and pilot valves on hand. When I change one out with the rebuilt one I rebuild it right away, or throw it out if it can't be fixed and order another new backup.