When installed and operated properly, an air heater should have a long service life. However there are many common pitfalls that can cause problems and shorten the expected lifespan. This article discusses our recommended best practices for installing air heaters to avoid the most common errors that shorten tool life.
Keep an eye out when buying used (and even new!) equipment to make sure the nameplate is intact and hasn’t been altered in any way. We’ve helped a few customers deal with serial numbers cut or scratched out of nameplates. The serial number is the easiest way to confirm age and ownership of a Leister tool. Without a serial number, the manufacturer’s warranty is unusable. You could even be purchasing a stolen piece of equipment. Don’t get caught! Check before you buy.
The serial number has been cut out of the nameplate on this tool and a poor attempt has been made to cover the resulting gap with black marker. This tool was purchased brand new from an unauthorized distributor. The equipment was not electrically certified for use in Canada and had not been modified to be compliant with the Canadian Electrical Code. The tool carries no warranty as a result.
Test welds are an important part of welding thermoplastics whether they’re used for roofing, tarps, pools, tunnels, landfills, or tailings ponds. Welds should be tested first thing in the morning and several times throughout the day to ensure that environmental changes are not compromising the strength of your welds.
Both regenerative and centrifugal blowers are widely used in industrial processes. Superficially the two types of blowers can seem similar and it can be difficult to find good information on the differences between the two types of blowers and why one would be selected over the other.
First, we’ll discuss what the two types of blowers have in common. Both types move air using an impeller on a rotating shaft. The air comes in the inlet and is focused while traveling with the impeller before exhausted as linear flow at the outlet. This is where the similarities end.
Plastic extrusion welders can generally be divided into two categories: screw-based extruders and non-screw-based extruders.
Learn our top 5 tips for properly caring for your hot air welding tools and minimizing maintenance.
One of the most common mistakes we see our customers making when selecting a process heater is basing their choice on temperature rating rather than power rating. Temperature can be important but is generally a dependant variable. In this article we will discuss why the power rating is such an important parameter and some of the fundamentals needed to calculate your process requirements.
Together the VARIMAT V2, UNIROOF AT, and TRIAC DRIVE comprise Leister’s line of automatic welders for thermoplastic roofing materials such as TPO, PVC, etc. There are some key difference between these tools which make each suited to particular jobs on the roof.
In an air heater, air is blown over a resistance coil which is heated by a voltage applied across it. The temperature control of the air at the outlet of an air heater depends on the level of sophistication of the heater and any control systems with which it is integrated. Before discussing air heater control, first we will take a very high level look at system control.
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