Trunnion Bearing with AISI 316 Stainless Steel and PTFE Liner

Trunnion Bearing with AISI 316 Stainless Steel and PTFE

A trunnion bearing manufactured from AISI 316 stainless steel and lined with PTFE (polytetrafluoroethylene) is designed to perform reliably in harsh and corrosive environments. This material combination merges the structural integrity and corrosion resistance of stainless steel with the low-friction, self-lubricating properties of PTFE, making it an ideal solution for demanding industrial applications.

AISI 316 Stainless Steel

• Overview:
  AISI 316 is a molybdenum-bearing austenitic stainless steel well known for its excellent resistance to chloride-induced corrosion and suitability for marine and chemical environments.

• Key Properties:

  • High strength and durability for long service life in challenging conditions.

  • Superior resistance to pitting, crevice corrosion, and aggressive chemicals.

  • Non-magnetic, ensuring reliable use in specialized environments.

  • Commonly used in chemical processing, marine, and heavy industrial equipment.

PTFE (Polytetrafluoroethylene)

• Overview:
  PTFE is a low-friction, self-lubricating polymer often used as a bearing surface or liner. It minimizes direct metal-to-metal contact, reducing wear and ensuring smooth motion.

• Key Properties:

  • Extremely low coefficient of friction, even under high load.

  • Chemically inert and resistant to a wide range of industrial fluids.

  • Maintains performance in both dry and lubricated conditions.

  • Heat resistant up to approximately 260°C.

  • Ideal for maintenance-free or low-maintenance applications.

Benefits of the Combination

When combined in a trunnion bearing, AISI 316 and PTFE offer:

• Corrosion resistance and structural strength from stainless steel.

• Reduced friction, wear protection, and extended lifespan from PTFE.

• Smoother operation and improved reliability in corrosive or high-load environments.

Typical Applications

This bearing design is widely used in:

• Valves, pumps, and rotating machinery in chemical plants.

• Offshore platforms and marine equipment exposed to saltwater.

• Industrial machinery where maintenance-free solutions are required.

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