
Materials
- VIRGIN PTFE
- PTFE Conductive
- TFM Conductive
- TFM WRG (Wear resistant gray)
- MFA
- PFA Conductive
- PEEK BG
- PEEK CF
- PTFE + 5% Glass
- PTFE + 25% Glass Balls
- PTFE + 15% Glass-fiber
- 15% Glass-fiber 5% MoS2
- PTFE + 15% Graphite
- PTFE + 22% Carbon + 3% Graphite
- PTFE + 15% Carbon Fiber + 10% Graph.
- PTFE + 10% Ekonol
- PTFE + 20% Bronze + 10% Carbon Fiber + 5% Graph.
- PTFE + 20% Bronze + 7% Ekonol + 3% Graphite
- 40% Bronze (+ green/blue)
- PTFE + 10% Carbon
- PTFE + 15% Carbon
- PTFE + 25% Carbon
- PTFE + 33% Carbon
- PTFE + 10% Carbon Fibers
- PTFE + 15% Carbon Fibers
- ECTFE
- Vespel®
- Polymid Vespel SP 1
- Polymid Vespel SP 21
- Polymid Vespel SP 22
- Polymid Vespel SP 211
- PPS-GV
- PPS-BG
- PA
- PA6
- PA66
- POM
- POM (PolyOxyMethylene)
- UHMWPE
- PE-HD
- PETP
- PP
- PVC
- PTFE + 10% PEEK
- PTFE + 15% PEEK
- VF 610 (PEEK + 10%PTFE)
- PTFE + 10% PPS
- PTFE + 15% PPS
- PTFE Turquoise
- PTFE + 15% Special Mineral filler
- PTFE + 20% Aramid Fibers
- Sideflon Shiny
- PTFE+ 55% Irregular Bronze Powder Not Oxidizing + 5% Molybdenum Disulfide
- Granular PTFE Fine Cut Resin (300µm)
- Sideflon
- UPG Black
- 20GL5M5GR (20% Glass Fibers + 5% MOS2 + 5% Graphite powder + 70% PTFE
- PTFE + 10% PPSO2 + 10% CF + 5% GR
- PTFE + 15% Glass + non porous additive
- PTFE + 15% CERAMIQUE
- PTFE + 15% PPSO2 + 10% Graphite
- PTFE + 25% Glass-fiber
- PTFE + 20% Aromatic Polyester
- PTFE + 10% Aromatic Polyester
- PTFE + 15% PPSO2+ 10% Graphite
- PTFE +25% Glass Balls
- 40% Bronze(+ green/blue)
- PTFE+ 55% non-oxidizing Bronze + 5% Molybdenum Disulfide
- PTFE + 15% Quarts
- PTFE + 20% Glass Fibers + 5% MOS2 + 5% Graphite
- PTFE + 25% Graphite
- PTFE + 40% Bronze + 10% Graph.
- PTFE + 40% Bronze(+ green/blue)
- PTFE + 50% Bronze + 10% Graph.
- PTFE + 50% Stainless Steel
- PTFE + 60% Bronze
- PTFE P84
- PTFE + 45% bronze + 5% MOS2
- POM-H + PTFE
- PB72
- PTFE P84 + Graphite
- TFM + 15% Glass-fiber
- TFM + 25% Glass-fiber
- TFM + 25% Carbon
- PTFE + 15% Carbon (EG31)
- PTFE + 10% PPS + 5% Carbon Fiber + 5% Graphite
- FEP (éthylène propylène fluoré)
- VFG-GreenVX1-BlueMaroon
PTFE back-up rings
Back-up rings are static seals, commonly installed with O-rings to prevent gap extrusion in static radial sealing in applications above 5 MPA. When high pressures are exerted, the soft material of the O-ring can be forced into the clearance gap, causing the O-ring to extrude. The hard back-up ring material will keep the O-ring from flowing into the gap, which will prevent premature failure. The size of the permissible extrusion gap depends mainly on the seal material, temperature and operating pressure
Back-up rings are available in extrusion resistant material such as PTFE. They are designed to fit between the O-ring and the extrusion gap and prevent the extrusion of the O-ring. The back-up ring is installed at the zero pressure side when the O-ring is exposed to pressure from one side. When the pressure comes from both sides, a back-up ring is installed on both sides. There are several types available: type S, SC, P, PC and SP.
Key properties
- Easy to install
- Resistant to high pressure
- Wide temperature range
Applications
- Hydraulic cylinders
- High-pressure hydraulic systems
- High-pressure valves