Polytetra buyer guide
PTFE rods & products: buyer's guide
Start with the finished part and its service conditions. PTFE rods provide machinable stock for bushes, seats, spacers and insulators; sheets support gasket cutting and liners. Drawing-based components, paper-industry parts, lined equipment and braided packing cover different duties. This buyer's guide links every catalogue product and the relevant engineering answers.
PTFE rods: diameter, length and machining
The rod catalogue lists extruded diameters of 5–100 mm and moulded diameters of 100–300 mm, with 300, 500 and 1000 mm standard lengths and custom cuts. Choose stock with machining allowance for the finished part. Confirm virgin or filled grade, drawing tolerances and inspection requirements; do not infer finished-part performance from rod size.
Virgin or filled PTFE stock?
Virgin PTFE is a starting point for purity and broad chemical resistance. Glass, carbon, bronze and MoS₂-filled rod grades address different mechanical requirements. Review chemical compatibility, load, temperature and mating surfaces before specifying a filler.
From stock shapes to finished components
Use standard rods, sheets and tape for stock and maintenance needs. Specialized gaskets, seats, balls, hoses and bellows require geometry and process conditions. Paper-industry bushes, rings and syphon shoes should match the machine drawing.
Lined flow equipment and packing
For corrosive fluid handling, review the liner and complete pipe, valve or fitting assembly. For stuffing boxes, select braided packing by equipment duty, section size and medium. Material temperature data alone does not approve either construction.
Prepare a quotation request
Send product name, quantity, drawing, dimensions, grade, medium and concentration, normal and maximum temperature, pressure or vacuum, speed where relevant and required inspection documents. Use each linked product's quote button to keep the request product-specific.
All five product families
Standard Items
Moulded and extruded PTFE stock shapes machined to size in virgin, glass, carbon, graphite and bronze filled grades.
- PTFE Teflon Rods
Extruded: 5–100 mm OD; moulded: 100–300 mm OD; 300, 500 and 1000 mm standard lengths; custom cut lengths
- PTFE Teflon Sheets
12 × 12 in (300 × 300 mm), 24 × 24 in (600 × 600 mm) and 1000 × 1000 mm; 3–50 mm thick
- PTFE Thread Sealant Tape
12, 19 and 25 mm widths; 10, 12 and 15 m roll lengths; standard density 0.4–0.6 g/cm³ and high density 1.2–1.6 g/cm³
Specialized Items
Critical, drawing-driven PTFE components machined on CNC for sealing, handling and flow control duties.
- PTFE Teflon Gasket
ANSI B16.21 and DIN flange sizes; Class 150/300; custom thicknesses and profiles
- PTFE Teflon Balls
6, 10, 16, 25 and 50 mm standard; custom diameters
- Hoses of PTFE Teflon
Bore, length and end connections made to order
- PTFE Butterfly Valve Seat
2–12 in nominal bore
- PTFE Expansion Bellows
1–8 in (25–200 mm) nominal bore
- PTFE Envelope Gasket
Standard and custom flange sizes
Paper Industry
Carbon filled Teflon wear parts engineered for rotary joints and dryer sections of paper mills.
- Carbon Filled Teflon Seal Ring
Custom rotary-joint diameters and sections
- Carbon Filled Teflon Guide Bush
Custom bore, outside diameter and length
- Carbon Filled Teflon Bush with S.S. Key
Bush-and-ring sets made to customer specification
- Syphon Shoe for Dryer
Custom profiles for dryer syphon assemblies
FEP Lined Items
Steel pipes, fittings and valves lined with 3 mm PTFE/FEP for aggressive corrosive service, all dielectric tested.
- FEP Lined Ball Valve
2 in nominal bore onwards; ANSI Class 150 body; 3–5 mm virgin FEP lining; spark tested at 20 kV
- FEP Lined Elbow
1–4 in; 45° and 90°; 3 mm lining
- FEP Lined Flush Bottom Valve
Standard vessel outlets; ANSI Class 150 body; 3–5 mm virgin FEP lining; long spindle option; spark tested at 20 kV
- FEP Lined Reducers & Reducing Flanges
40–150 mm nominal bore; concentric, eccentric, S and C types
- PTFE/FEP Lined Dip Pipe & Spargers
Up to 4 in diameter; Schedule 40/80 steel core
- PTFE/FEP Lined Pipe
25–200 mm nominal bore; Schedule 40 carbon steel; Class 150; virgin FEP liner; service up to 180°C
- FEP/PFA Lined Protector Ring
Standard flange sizes; 3 mm lining on both sides
PTFE Braided Packing
Braided gland packing for pumps, valves and static duty in pure, graphited and aramid reinforced constructions.
- Pure PTFE Teflon Packing
Square sections and coil lengths to application
- PTFE Universal Soft Packing
Round and square sections; custom coil lengths
- Graphited PTFE & Aramid Combination Packing
Square sections and coil lengths to application
- Graphite Filled Teflon Packing
Square sections and formed rings on request
- Aramid PTFE Packing
Square sections and coil lengths to application