PTFE Products & Components
Engineered PTFE & Polymer Components
Sag Engineers manufactures standard sizes and customized geometries in 100% Virgin Grade PTFE or specialized filled formulations designed for demanding operational environments.
Extruded & Molded
PTFE Rods : Large & Standard
Compression molded and ram extruded solid round bars. High dimensional precision, isotropic density, and stress-relieved for precise machining.
- Standard Dia: 19mm to 300mm
- Large Discs: Up to 1000mm Ø
- Standard Length: 300mm / 600mm / 1000mm
- 100% Pure Virgin or Filled PTFE
Self-Lubricating
PTFE Bushes & Hollow Tubes
Precision thick-wall and thin-wall hollow bushes. Eliminates lubrication needs, reduces shaft friction, and withstands harsh chemical slurry.
- Standard O.D.: 32mm to 150mm
- Standard I.D.: 12.5mm to 125mm
- Custom O.D.: Up to 1100mm Max
- Fillers: Glass / Carbon / Bronze / MoS2
Molded & Skived
PTFE Sheets & Plates
Available in molded squares and continuous skived rolls. Excellent dielectric barrier, bridge slide bearing pads, chute linings, and gasket fabrication.
- Sizes: 300x300, 450x450, 600x600, 1000x1000mm
- Standard Thickness: 2mm to 25mm
- Heavy Duty Plates: Up to 50mm
- Chemical, Food & Electrical Grade
Static Sealing
PTFE Gaskets (Envelope & Solid)
Envelope type (milled & slit with CAF/CNAF or corrugated stainless steel inserts) and solid cut gaskets for ANSI/DIN/BS pipe flanges.
- Standard Size: 12mm NB onwards
- Solid Gaskets: Up to 1100mm OD
- Shapes: Circular, Oval, Elliptical, Custom
- Glass-Lined & Steel Flanges
CNC Micro-Tolerances
PTFE Machined Finish Components
Bespoke CNC machined components: valve seats, plug valve sleeves, chevron V-packings, rider rings, back-up rings, and laboratory crucibles.
- Multi-Axis CNC Lathe Turning
- Piston Rings for Dry Gas Compressors
- Rotameter Floats & Non-Return Balls
- 100% Adherence to Drawings
Corrosion Control
PTFE Valves & Components
PTFE & PFA lined ball valves, plug valves, butterfly valve liners, and replacement seat rings designed for highly corrosive and toxic chemicals.
- Ball, Plug, Diaphragm & Check Valves
- Zero Leakage Bubble-Tight Sealing
- Resists Pure Acids & Strong Alkalis
- Spark-Tested Lining Integrity
Flexible Expansion
PTFE Expansion Bellows
QVF bellows for glass piping and line bellows for lined piping systems. Absorbs thermal expansion, mechanical vibrations, shocks, and misalignment.
- Size Range: 25mm NB to 300mm NB+
- Convolutions: 'V' Section & Rounded
- Flanges: Carbon Steel / Ductile Iron / Al
- High Pressure & Vacuum Resistance
High Performance
Filled PTFE Alloys & Plastics
Compounds incorporating Bronze, Glass, Carbon, Graphite, and MoS2 fillers for amplified wear life, high load, and thermal conductivity.
- Bronze Filled: 40% & 60%
- Glass Filled: 15% & 25%
- Carbon Filled: 25% & 33%
- Delrin, UHMWPE & PP Parts
Thermoplastics
Engineering Plastics (UHMWPE & Delrin)
Precision machined components in UHMWPE (Polypic), Polyacetal (Delrin), and Polypropylene (PP) for high abrasion and impact resistance.
- UHMWPE Wear Strips & Guides
- Delrin Precision Gears & Rollers
- Polypropylene Acid Tanks & Fittings
- Superior Impact & Abrasion Life
PTFE Fillers & Alloy Performance Matrix
Select the ideal filled PTFE compound based on mechanical loading, thermal conductivity, and operational friction:
| Compound / Grade | Composition | Key Strengths | Major Industrial Applications |
|---|---|---|---|
| Virgin PTFE | 100% Pure PTFE Resin | Maximum chemical inertness, best electrical properties, lowest friction, FDA food grade. | Chemical gaskets, valve seats, laboratory beakers, pharmaceutical seals, electrical insulators. |
| Glass-Filled PTFE | 15% to 25% E-Glass Fibres | Greatly reduced deformation under load (cold flow), enhanced wear resistance, high compressive strength. | Flange gaskets, valve seats, hydraulic backup rings, pump bearings in chemical service. |
| Carbon-Filled PTFE | 25% to 33% Amorphous Carbon | High wear resistance under dry friction, improved thermal conductivity, antistatic properties. | Piston rings for non-lubricated compressors, rider rings, high-speed dynamic sealing. |
| Bronze-Filled PTFE | 40% to 60% Bronze Powder | Maximum thermal conductivity, superior dimensional stability, outstanding load-carrying capacity. | Hydraulic piston guides, heavy-load sliding bearings, mechanical bushings (non-acid media). |
| Graphite-Filled PTFE | 5% to 15% Synthetic Graphite | Extremely low coefficient of friction against soft counter-surfaces, excellent thermal transfer. | Rotating shaft seals, high-speed centrifugal pump packings, low-friction slide bearings. |
| MoS2-Filled PTFE | PTFE + Bronze + Molybdenum Disulfide | Enhanced surface hardness, lower friction, improved initial running-in lubricity. | Dynamic pneumatic seals, automotive shock absorber rings, specialized compressor rings. |