PTFE Piston Ring — Material Specifications, Engineering Data & OEM Supply
PTFE Piston Ring is manufactured in Gujarat by HEMSUN ENGG. INDUSTRIES, providing tight dimensional accuracy and long service life in backup rings and chevron packings. Features premium PTFE fluoropolymer compounding, void-free sintering, and precision CMM inspection.
Where PTFE Piston Ring is used
Sealing ring in oil-free compressors and cylinders, riding the bore to seal pressure without lubricant contaminating the gas stream.
PTFE suits oil-free piston rings because it can run unlubricated against a bore without transferring contaminant into the gas stream.
Key properties
In-house PTFE Piston Ring production
moulding and CNC under one roof
Drawing, CAD (STEP/IGES/DXF), or sample-based reverse engineering
PTFE grade options matched to chemical and thermal duty
Dimensional inspection with reports on request
IEC-registered exporter
worldwide packing and docs
Flexible MOQ
prototypes, pilot lots, recurring OEM supply
Specifications
| Property | Value |
|---|---|
| Component Type & Grade | PTFE Piston Ring (Specification Code HES-771) |
| Base Raw Material | PTFE fluoropolymer (Virgin FDA 21 CFR 177.1550 / Custom Filled) |
| Continuous Service Temp. | -200°C to +260°C (-328°F to +500°F) |
| Tensile Strength at Break | 20 to 35 MPa (Virgin) / 14 to 25 MPa (Filled) |
| Elongation at Break | 250% to 450% (ASTM D4894) |
| Specific Gravity / Density | 2.14 to 2.18 g/cm³ (ASTM D792) |
| Dielectric Strength | 50 to 80 kV/mm (0.1 mm film) |
| Surface Roughness Finish | Diamond Polished Ra ≤ 0.20 µm to Ra ≤ 0.40 µm |
| Dimensional Tolerance | ISO Grade 1 to Grade 3 / Drawing Nominals (±0.02 mm) |
| Manufacturing & Origin | Moulded, Sintered & CNC Machined in Dahegam, Gandhinagar, Gujarat, India |
Manufacturing process
HEMSUN ENGG. INDUSTRIES produces PTFE Piston Ring using matched punch-and-die compaction of PTFE fluoropolymer resins. Green preforms are sintered in digital PID-controlled ovens with multi-point thermocouple logging, followed by precision CNC lathe turning to achieve micron-level concentricity and smooth surface finishes.
Material selection notes
The PTFE fluoropolymer material utilized in PTFE Piston Ring exhibits exceptional dielectric insulation (up to 80 kV/mm) and zero moisture absorption (<0.01%). It withstands thermal cycling between cryogenic temperatures and +260°C without embrittlement or dimensional degradation in demanding industrial environments.
How to specify your order
When requesting a proposal for PTFE Piston Ring, please provide 2D/3D component drawings with dimensional tolerances, material resin grade (virgin or specific filler ratio), operating pressure/temperature conditions, and required batch quantities. Our engineering team reviews manufacturability and returns quotes within 24 hours.
Quality checks and inspection
Each shipment of PTFE Piston Ring is verified through comprehensive QA benchmarks: CMM dimensional layout, density gradient analysis, high-voltage insulation breakdown testing, and certified inspection reports.
Ordering and export documentation
Domestic PTFE Piston Ring orders ship with GST invoice and e-way bill where applicable. Export orders include commercial invoice, packing list, and certificate of origin from our IEC-registered works. Recurring supply schedules supported with fixed drawing revision and lot numbering for plant stores Contact info@hemsun.com or sales@hemsun.com with your rings specification.
Export packing and lead time
We provide full export support for PTFE Piston Ring orders worldwide. International documentation includes Certificate of Origin, packing lists, material safety data sheets, and custom export crating designed to withstand long-distance maritime transit.
Storage and handling
Storage and operating notes for PTFE Piston Ring: Keep parts in sealed packaging at ambient room temperature. During equipment overhaul, inspect sealing lips for particulate embedding and replace components showing mechanical wear.
Compliance & Standards
HEMSUN is a DGFT IEC registered exporter (Government of India). Sealing faces are inspected for flatness and finish, thickness verified on calibrated gauges, and sintered density checked per ASTM D792. A mill test certificate ships with the order. Export paperwork — commercial invoice, packing list and certificate of origin — accompanies international despatch.
Frequently Asked Questions
What PTFE Piston Ring options does HEMSUN manufacture?
PTFE Piston Ring is manufactured in Gujarat by HEMSUN ENGG. INDUSTRIES, providing tight dimensional accuracy and long service life in backup rings and chevron packings. Features premium PTFE fluoropolymer compounding, v…
Can you supply PTFE Piston Ring 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 PTFE Piston Ring?
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.