PSI Behind the Scenes

PSI's Kevin Hennig demonstrates the ThermAlert Eutectic plug in the wheel seal cover. It's designed to melt and whistle if the wheel-end over heats. Photo by Jim Park

Through-Tee and stator assemblies stand ready to be tested. Photo by Jim Park

The axle plug is fitted with a threaded fitting that will eventually hold the ThermAlert plug. Photo by Jim Park

A skid full of control boxes stands by the door waiting to be shipped to a trailer manufacturer. Photo by Jim Park

Mike Niemeyer explains to customers how the MTIS automatic tire inflation system works. Photo by Jim Park

A worker checks the calibration of the pressure adjustment switch in the control box. Photo by Jim Park

A skid of completed axle kits on its way to a trailer manufacturer for installation. Photo by Jim Park

Minimum levels of inventory are kept on hand to keep costs down. Photo by Jim Park

Through-Tees are assembled with the vent extensions, O-rings and deflector shields. Photo by Jim Park

Through-Tee sub-assembly. Photo by Jim Park

San Antonio is home to the Alamo and Pressure Systems International, makers of the Meritor Tire Inflation System. Photo by Jim Park

Rotary union seals are check for long life on a test bench. These samples have been going round and round for months without stopping. Photo by Jim Park

Nothing gets past Rosa. She works in quality control, checking each of the air delivery tubes for imperfections. Photo by Jim Park

Mari and her crew fill the orders for axle kits, and double-check all the parts are in the box before it's sealed up for shipping. Photo by Jim Park

Through-Tees and their fittings are joined together for the first time with their dust shields and eventually their stator tubes. Photo by Jim Park

Each assembly is pressure tested under water to avoid avoid leaks. If the operators sees bubbles, the part is rejected and repaired. Photo by Jim Park

