Solenoid valve for filling nozzle (gun)

I have no experience with running a paste through any solenoid valve, but i do know that the valves have operational viscosity ranges. any valve designed for oil or water will most likely not work well with a paste. I'm sure someone out there makes a valve for just such an application. might try a globalspec or well worded google search (trial and error on the later). You can also try getting ahold of a valve manufacturer, I work closely with Rexroth, and don't know of anything off the top of my head that has been designed for what you propose, but i'm sure you'll find something that will work eventually. Get a hold of an application engineer at a company that designs and manufactures solenoid valves.

A lot of auto service areas have air operated pumps that they use to grease cars. They are usually located in a central area and operate all the guns in the service area.

I have also heard of hand held air powered Grease Guns.

Hi

I believe you need to have source for a pump first to pressure the filling out of the dispensing nozzle.

I would suggest you to consider solving the pump first and then secondly by thinking of dispensing gun for your filling. I believe normal Air Gun use in the industrial can be considered to dispense the filling out of the Nozzle and with the help of addition Flow Value. (Common item at the hardware shop.)

Regards

Patrick

Google dispensing equipment. There are valves available to dispense thick products like sealants and caulks. As I have a few here. Nordson and Graco are two companies that come to mind. I have both a Nordson and a Graco bulk melter. Prefer the Nordson. Getting help from Graco like pulling teeth.

In case you need encouragement - we used to dispense silver loaded epoxy paste using this method - similar consistency, but much more non-uniform and very much smaller quantities. Initially, we had a variability problem caused by the combination of elasticity in the (relatively large) volume of "dead" air and the variation in the paste passing through the syringe - once we got the air volume small enough it worked just fine. If your description is complete, you a completely standard arrangement should work for you.

But is injection as a paste the best possibility - have you considered cooling the paste so it can be inserted in fixed lengths?

You should use a syringe-type gun and drive this with compressed air. For example, use a paint syringe or build your own using a pneumatic cylinder, using it the opposite way. This method is used worldwide to dispense glue, epoxy and so on.

Is it for food application?

What is the tolerance of the volume per dispensing?

What is the min and max of volume per dispensing?

5 & 6 have what you need. I have used the ARO pumps for years. You can't kill them. Use pump components designed for food. Use a nozzle on the discharge side. A trigger to control the air pressure into the pump. Adjust the air pressure to deliver the goop. If you wanted to you could trigger the air to the pump with a sensor, and a timer to inject just the right amount of filling. Good luck.

the solinoid valve on the air line is a good idea because the paste will not push through due to its paste like property. . . . but you didnt mention whats the volume of the flow in the discharge port. im quite worried that some will still spill down after the air supply is cut off specialy if the volume is huge. and it will surely make a mess if some will spill.

i have seen different types of valve in the industry and i would surely recommend that you check out the EVERLASTING valve brand. they specialize in sticky and abrasive medium. everlasting has a different design which you have to see first the drawing to appreciate its function.

if youre interested just give me a reply and ill be glad to help you find it.

This is a dispensing application.

If you are interested contact Todd Williams twilliams@ExactDispensing.com he may have a solution or if not direct you to a supplier.