Teflon Seals Pump Shaft

Sept. 25, 1998
Accro-Seal, Vicksburg, Mich., uses Teflon PTFE fluoropolymer resin from DuPont, Wilmington, Del., to mold the rings for its new pump-shaft sealing system, called Accroseal PLE

Accro-Seal, Vicksburg, Mich., uses Teflon PTFE fluoropolymer resin from DuPont, Wilmington, Del., to mold the rings for its new pump-shaft sealing system, called Accroseal PLE. The PLE system consists of four sealing rings. Two of them create a seal by wedging together to force one ring against the shaft and the other against the stuffing box. The other two rings are flat back-up rings that hold puttylike packing in place.

The injectable packing compound contains particles of Teflon PTFE that reduce friction and eliminate the need to flush fluid through the packing for cooling and lubrication. “The built-in lubrication of Teflon PTFE helps the PLE system last three times as long as conventional packing while reducing shaft wear,” said Joe Messer, president of Accro-Seal.

Another maintenance-saving advantage of the system is that workers can replenish the material while equipment is running by injecting additional packing through the stuffing-box flush port. The compound can be used in any stuffing box, making it more versatile than conventional woven packings and mechanical seals that must be sized.

Teflon PTFE resists almost all chemicals, so the system can work in industrial environments ranging from chemical processing and petroleum refining to paper mills and other industries using rotating-shaft equipment.

© 2010 Penton Media, Inc.

Sponsored Recommendations

April 16, 2025
Clean. Compact. Less heat.
April 16, 2025
SEW-EURODRIVE Introduces DR2C motor, IE5 Ultra-Premium Efficiency Motor
March 31, 2025
Unlike passive products - made of simple carbon springs - the bionic prostheses developed by Revival Bionics are propulsive, equipped with a motor and an artificial Achilles tendon...
March 31, 2025
Electric drives are a key technology for the performance of machines, robots, and power tools. Download this guide for an introduction to high-quality mechatronic drive systems...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!