Dynamic seal Stuftef SS

O-ringelastomerNBR

Product description Stuftef SS is a single-acting active sealing element composed of a PTFE sealing profile and an O-ring used as preload. The design increases sealing force as system pressure rises and conveys a thin lubricating film from the rod back into the pressure chamber during return strokes. PTFE can be filled (bronze or carbon graphite) to improve compressive strength. O-rings are offered in various elastomer compounds. This solution is suited to industrial hydraulic and pneumatic applications including cylinders, fittings, presses and machine tools.

Fields of application

• static
• dynamic
• single acting
• double acting
• linear
• rotating
• oscillating

Main use standard single-acting hydraulic sealing for cylinders and rod applications

Materials PTFE (unfilled or filled with bronze / carbon graphite); elastomers for O-rings (examples: NBR, FKM). Additional material options available on request.

Technical values

• Material examples / variants: NBR, FKM
• Pressure: up to 40 MPa
• Temperature: approx. -30°C to +80°C (variant dependent); up to -20°C to +200°C (high-temperature variants)
• Speed: up to 10 m/s
• Note: Maximum temperature, speed and pressure values are not simultaneously applicable and depend on chosen materials and media.

Technical specifications

• Type: single-acting active sealing element
• Design: PTFE sealing profile combined with O-ring preload
• PTFE filling options: bronze, carbon graphite to enhance compressive strength
• Suitable for: hydraulic/pneumatic cylinders, fittings, presses, machine tools
• Available materials: PTFE, filled PTFE, elastomers (O-rings)
• Typical material variants indicated: NBR, FKM
• Max. pressure: up to 40 MPa
• Temperature ranges (material-dependent): approx. -30°C to +80°C; -20°C to +200°C for specific variants
• Max. speed: up to 10 m/s
• Important: Specified maxima vary with material and media and cannot be applied simultaneously.