PTFE Metal-Cased Rotary Shaft Seals

PTFE Metal-Cased Rotary Shaft Seals

PTFE Metal-Cased Rotary Shaft Seals are designed for rotating equipment requiring low friction, high temperature resistance and reliable sealing under demanding operating conditions. These seals combine a PTFE sealing lip with a rigid metal casing, providing a compact sealing solution for industrial machinery and power transmission equipment.

Compared with conventional elastomeric rotary shaft seals, PTFE lip seals offer excellent chemical resistance and a low coefficient of friction. Selected designs can operate at higher shaft surface speeds and temperatures, while certain PTFE compounds also provide limited dry-running capability.

Features & Advantages

• Low-Friction Sealing: PTFE sealing lips help reduce friction and heat generation at the shaft contact surface.

• High-Temperature Resistance: Suitable PTFE compounds can operate in elevated-temperature environments where conventional rubber seals may be unsuitable.

• Chemical Resistance: Good resistance to many industrial oils, lubricants, solvents and aggressive chemicals.

• Metal-Cased Construction: A rigid metal casing provides structural support and secure installation in the housing bore.

• High-Speed Capability: Selected sealing profiles are designed for high-speed rotary applications.

• Dry-Running Capability: Certain PTFE materials and designs can tolerate limited or specially engineered dry-running conditions.

Materials & Seal Construction

PTFE metal-cased rotary shaft seals are available with unfilled PTFE or filled PTFE sealing lips. Common filler materials include carbon, graphite and glass fiber, which can improve wear resistance, dimensional stability or other performance characteristics depending on the formulation.

The outer casing is typically manufactured from steel, with stainless steel options available for applications requiring additional corrosion resistance.

Single-lip and multi-lip designs can be selected according to lubricant retention, contaminant exclusion and operating requirements. Some designs use formed PTFE lips without a conventional garter spring.

Typical Applications

PTFE metal-cased rotary shaft seals are used in:

• Industrial gearboxes and transmissions

• High-speed rotating shafts

• Pumps and compressors

• Chemical processing equipment

• Industrial motors and drive systems

• Power transmission equipment

• Machinery operating with demanding lubricants or elevated temperatures

Standard & Custom Supply

CORA SEALS supplies PTFE metal-cased rotary shaft seals for industrial distributors, OEM manufacturers and maintenance applications.

Different dimensions, PTFE compounds, metal casing materials and sealing lip configurations can be sourced according to technical drawings, existing samples or equipment requirements.

For quotations, please provide the shaft diameter, housing bore diameter, seal width, PTFE material requirements and quantity. Operating temperature, shaft speed, pressure, sealing medium and lubrication conditions are also important for selecting a suitable seal design.