Piston seal Stuftef KS

lipelastomerNBR

Overview
Stuftef KS is a single-acting rod sealing element composed of a PTFE lip seal and an O-ring as preload. It is an active seal: increasing system pressure raises the sealing force on the lip. The special geometry conveys an adherent lubricating film from the rod back into the pressure chamber during the return stroke. Suitable for hydraulic and pneumatic cylinders, fittings, presses and machine tools; compatible with tandem arrangements. PTFE compounds are available filled with bronze or carbon graphite to improve compressive strength. Other materials on request. O-rings are available in various elastomer materials (e.g. NBR, FKM).

Fields of application

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

Main use
Standard single-acting rod seal for hydraulic cylinders.

Materials
PTFE; PTFE with bronze or carbon graphite filling; elastomers for O-rings (examples: NBR, FKM). Other material combinations available on request.

Technical values
Material variant: NBR

• Pressure: up to 40 MPa
• Temperature: -30°C to +80°C (material dependent)
• Speed: up to 10 m/s

Material variant: FKM

• Pressure: up to 40 MPa
• Temperature: -20°C to +200°C (material dependent)
• Speed: up to 10 m/s

Note
Maximum values for temperature, speed and pressure are not simultaneously applicable; actual limits depend on material and media.

Technical specifications

• Model: Stuftef KS
• Type: single-acting sealing element (PTFE seal + O-ring preload)
• Main use: standard single-acting rod seal for hydraulic cylinders
• Materials: PTFE; PTFE with bronze or carbon graphite filling; elastomers (e.g. NBR, FKM)
• Pressure: up to 40 MPa
• Temperature: -30°C to +80°C (NBR); -20°C to +200°C (FKM)
• Speed: up to 10 m/s
• Suitable for: hydraulic and pneumatic cylinders, fittings, presses, machine tools; tandem arrangement