It is Usually Always a Clog

The most common reason for your hot glue system acting up is because of a clog. Clogs are common because you are working with glue, which is sticky and chars over time. Below are some of the most common technical calls we receive, with the solution…and you guessed it, it’s usually always a clog.

Pump is not pumping

There are several reasons as to why your pump can stop up. Honestly, it is usually dirty oily air in your shifter. However, when it is not your shifter it is usually a clog. If your shifter is running fine, but it sucked something up into the hydraulics of the pump, the pump shifter will be stopped in the top position, unable to shift down. That is because you probably have some char or debris in your hot glue reservoir and while pumping, you sucked something up into the ball check valve. You have now clogged up your pump and need to send it in for a flush and clean. Another potential issue could arise if your pump is running but sluggish. If your pump is running mush slower than it used to, it is probably because you haven’t changed out your tank filter and it is clogged. The tank filter is located on the side of the tank and filters all glue before it runs into the hoses. If that filter is not regularly changed (every 500 – 1500 hours depending on how clean your glue is) then that clog can cause pressure to back up into the tank and not allow your pump to run at full capacity.

Gun is not firing

If your gun is not firing at all, it is probably your solenoid valve. However, if your gun is firing every other time or randomly, it is probably due to a clog in your in-line filters. The in-line filters filter the glue from your hoses into your gun. These filters are there to help filter our char or debris that was missed by the tank filter or that has built up in the heated hose. If the filter screens are not changed regularly, they will get clogged up and not allow for your gun to fire properly. For example, if you need to increase air pressure in order for your gun to fire, it is probably the in-line filter clogged up. Another clog can happen in the gun manifold itself. Typically, this is only in multi-module guns. If you have a multi-module gun and the last module in the line is not firing, there is probably a clog in the manifold.

Module Drips

If your module is constantly dripping glue, then you have a clog in your module. This is most common in air open, spring close modules. A piece of char will get stuck in the seat and not allow the piston to seal tightly, causing the glue to drip out. A clogged module will need to be replaced with a new module.

Nozzle keeps clogging

This one is fairly straight-forward. If your nozzles keep clogging there are a few solutions. First, you can change out your in-line gun filters. They are probably not clean and not filtering the glue through the gun. You can also increase your nozzle diameter. If you are running small hole nozzles such as .010 or .012 diameter, try a .014 or .016 and you will start to see less clogging. However, that will lay down a little more glue, so keep that in mind when reviewing your glue usage.

The best way overall to reduce the number of clogs in your hot melt systems is to do preventative maintenance. That means cleaning your tank every month or every quarter, depending on how many shifts your tanks are running. Universal Systems makes Purge Plus tank cleaner and we sell them in a 5-gallon pail so that you are set for at least 2 – 3 cleanings. Additionally, change out your tank filters and in-line filters. These 3 tips are the most inexpensive way to keep your hot melt system running smoothly.

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How Melter Sustainability Lowers the Impact on Your Budget

Budgeting is nothing new, it is one of the toughest parts of business. When you are running a packaging plant and need equipment, but the budget does not allow for it, what happens then? There is an answer to that dilemma…buy reliable melters and do preventative maintenance from the start.

Reliability is what we focus on at Universal Systems. We know that being up and running is the most important part of high-speed packaging. Not only do we offer full time customer service and an unparalleled heater warranty, our melters and components are easy to install, easy to operate and the most affordable on the market. All of our ProBilt melters come with a 4-hose max capacity and 10 year heater warranty. They also all run the same pump and same AccuScan Control Panel, no matter what size tank capacity, allowing you to stock less overall inventory since there is such versatility. This key feature helps you in lowering your overall budget spending.

When calculating budget, you also need to take into consideration personnel and training of personnel. The Universal Systems ProBilt melters are easy to install and operate, proud of the fact that we are plug and play. With just the press of a button, you can set the temperature on your tank and all your hoses and guns. With our seamless set back feature, you can leave the tank heated to 165 degrees if you are not using it for a shift, then heat back to regular set temperature within minutes to run at full capacity again.

Another key fact in lowering your overall spend is preventative maintenance. At Universal Systems, we really push our customers to maintain their equipment and keep it clean and filtered. Be as good to your equipment as you want it to be to you. Spending only hundreds of dollars monthly on preventative maintenance items such as filters and cleaning kits will save you thousands of dollars per year trying to fix what you could have prevented. We put together a suggested preventative maintenance schedule. For more information call one of our sales reps today at (561) 272-5442 or email

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