Vicksburg, MI--Wastewater leakage from pumps and other equipment can create serious environmental and health problems, not to mention costly repair costs. That's where seals play a vital role.
To help eliminate leaks, Accro-Seal has designed the Accroseal(reg) PLE sealing system. It promises to reduce wastewater generation, leakage, and maintenance in sealing the rotating shafts of pumps and similar equipment.
The system involves four parts made from a fluoropolymer resin and an injectable packing compound that contains particles of the slippery material. Both are based on Teflon(reg) PTFE (polytetrafluoroethylene) supplied by DuPont Fluoroproducts (Wilmington, DE).
The PLE design features two patented, tapered sealing rings. They wedge together to force one ring against the shaft and the other against the stuffing box bore. The other parts consist of flat backup rings that hold the putty-like packing in place.
Teflon's low friction and the system's innovative design make the leak-eliminating design possible. Moreover, there's no need to flush fluid through the packing for cooling and lubrication, according to Joe Messer Accro-Seal president. Such fluids would have to be treated before being released to the environment.
"The built-in lubrication of Teflon helps it last three times as long as conventional packing, while reducing shaft wear," Messer adds. The system's rings include a filled compound to provide lower creep and higher wear resistance than unfilled PTFE.
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