Carbon-Filled PTFE Washer — why this filler for this component
Carbon-filled thrust washers are specified where the thrust face runs wet, or where static must not accumulate across it. Both are conditions that rule out the more obvious choices — bronze corrodes in water, and unfilled PTFE is an insulator that lets charge build.
Where Carbon-Filled PTFE Washer is used
Against a bronze-filled washer
carbon survives water and steam where bronze corrodes, and dissipates static. Bronze conducts heat better still and takes more load, so on dry, fast, heavily loaded thrust faces bronze remains the stronger choice.
Thickness loss is gradual. In wet service, inspect for pickup or deposits on the mating faces as well — contamination between the faces will wear the washer faster than the load alone.
Key properties
Compound
Carbon-filled PTFE, typically 25% carbon
Duty
wet and steam thrust service; static-dissipating assemblies
How it behaves here
Carbon carries load and conducts, so the washer both survives the wet contact and provides a conductive path between the rotating and static parts. On a continuous flat contact the thermal conductivity also helps move frictional heat into the adjacent metal.
Where it does not belong
Strong oxidisers attack the carbon, and the compound marks light-coloured components. It also carries less load than bronze on dry high-speed duty.
Specifications
| Property | Value |
|---|---|
| Compound | Carbon-filled PTFE, typically 25% carbon |
| Duty | Wet, steam and anti-static thrust service |
| Form supplied | Moulded and machined to drawing |
| Governing factor | Wet-service stability and static dissipation |
| Counterface | Flat, parallel; stainless in wet service |
| Not suitable for | Strong oxidisers; light-product contact |
Manufacturing process
Compression moulded from 25% carbon compound, sintered, then machined to your drawing.
Material selection notes
Carbon carries load and conducts, so the washer both survives the wet contact and provides a conductive path between the rotating and static parts. On a continuous flat contact the thermal conductivity also helps move frictional heat into the adjacent metal.
How to specify your order
Against a bronze-filled washer: carbon survives water and steam where bronze corrodes, and dissipates static. Bronze conducts heat better still and takes more load, so on dry, fast, heavily loaded thrust faces bronze remains the stronger choice.
Quality checks and inspection
Dimensions are verified on CMM against your drawing. Filler content and sintered density are checked per ASTM D792, with tensile and elongation per ASTM D4894. A mill test certificate stating the lot, filler content and measured values ships with the order.
Ordering and export documentation
Check both faces for flatness and parallelism as with any thrust washer. In wet assemblies confirm the housing drains, because standing water at the contact accelerates wear regardless of compound.
Export packing and lead time
HEMSUN is a DGFT IEC registered exporter (Government of India). Commercial invoice, packing list and certificate of origin accompany international despatch.
Storage and handling
Thickness loss is gradual. In wet service, inspect for pickup or deposits on the mating faces as well — contamination between the faces will wear the washer faster than the load alone.
Compliance & Standards
HEMSUN is a DGFT IEC registered exporter (Government of India). Filler content and sintered density are verified per ASTM D792 on each batch, with tensile and elongation checked per ASTM D4894.
Frequently Asked Questions
What Carbon-Filled PTFE Washer options does HEMSUN manufacture?
Carbon-filled thrust washers are specified where the thrust face runs wet, or where static must not accumulate across it. Both are conditions that rule out the more obvious choices — bronze corrodes in water, and unfill…
Can you supply Carbon-Filled PTFE Washer for OEM and export orders?
Yes. We support prototype lots, recurring OEM programmes, and export packing with material certificates and dimensional inspection reports on request. Typical RFQ response is within one business day when drawings are complete.
How do I request a quote for Carbon-Filled PTFE Washer?
Send material grade, dimensions or drawing, quantity, application media, and operating temperature/pressure via https://hemsun.com/contact. Our engineering team confirms manufacturability, lead time, and pricing.
