PTFE Ring — Material Specifications, Engineering Data & OEM Supply
HEMSUN ENGG. INDUSTRIES manufactures PTFE Ring in Dahegam, Gandhinagar, Gujarat, India for high-performance industrial sealing, chemical processing, and valve OEM applications. Engineered from 100% virgin and custom-filled PTFE fluoropolymer, featuring chemical inertness (pH 0–14), wide operating temperature (-200°C to +260°C), and precision CMM-inspected tolerances for domestic and export supply.
Where PTFE Ring is used
Sealing and wear ring locating and retaining pressure at a bore or shaft interface.
PTFE suits sealing and wear rings because it conforms to the bore under pressure while keeping friction low.
Supplied to drawing across the published range — Size range
DN15 to DN300 / 1/2 inch to 12 inch; Material: Virgin PTFE / Filled PTFE / Food Grade PTFE — with dimensional and material reports on request.
Key properties
Types
Full Face, Ring Type, Envelope, Expanded, Backup Ring, Guide Ring, Wear Ring, Custom
Size range
DN15 to DN300 / 1/2 inch to 12 inch
Thickness
0.5mm to 25mm
Material
Virgin PTFE / Filled PTFE / Food Grade PTFE
Temperature range
-200°C to +260°C
Pressure
as per design requirement
Chemical Resistance
full resistance, pH 0 to 14
Self-lubricating
ultra-low friction coefficient 0.04 to 0.10
FDA Compliance
Food Grade PTFE Ring available on request
Backup Rings
for O-ring anti-extrusion protection
Custom Sizing
dimensions from drawing or sample
IEC registered
export-ready quality
Specifications
| Property | Value |
|---|---|
| Component Type & Grade | PTFE Ring (Specification Code HES-945) |
| 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
Our dedicated manufacturing cells produce PTFE Ring from premium PTFE fluoropolymer powder stock. After uniaxial preforming in precision tooling, components undergo computer-monitored sintering cycles and diamond-tooled CNC profiling to hold exact drawing dimensions.
Material selection notes
Featuring FDA-compliant virgin PTFE fluoropolymer or specialized filled compounds, PTFE Ring provides reliable sealing and low-friction motion under continuous operating temperatures up to +260°C. Filler additions enhance mechanical rigidity, wear resistance, and thermal conductivity for heavy mechanical loads.
How to specify your order
To evaluate PTFE Ring for your project, submit component PDF drawings and resin requirements. HEMSUN engineers review part geometry, recommend appropriate compression tooling or CNC machining approaches, and provide competitive commercial proposals.
Quality checks and inspection
Quality assurance for PTFE Ring includes 100% optical dimensional inspection, digital micrometer verification, CMM coordinate layout testing, and water displacement specific gravity checks according to ASTM D792. High-voltage spark testing up to 80 kV/mm verifies absence of internal pinholes and voids.
Ordering and export documentation
Domestic PTFE 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. Material certificates and dimensional reports attached for qualified pharmaceutical and OEM shipments Contact info@hemsun.com or sales@hemsun.com with your rings specification.
Export packing and lead time
Export customers receive complete logistics assistance for PTFE Ring, including FOB/CIF shipping quotes, express air courier delivery for prototype samples, and secure sea-freight container packing with full batch traceability.
Storage and handling
Care and handling for PTFE Ring: Protect machined sealing edges against impact during transit and staging. Do not exceed recommended compressive stress limits during mechanical flange tightening.
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 is a PTFE Backup Ring and why is it used?
A PTFE Backup Ring is installed on the downstream side of an O-ring or hydraulic seal to prevent extrusion of the primary seal at high pressures. It provides anti-extrusion support, protects the O-ring, and dramatically extends seal life in hydraulic cylinders, pneumatic actuators, and high-pressure valve systems.
What sizes of PTFE Rings do you manufacture?
Standard range is DN15 to DN300 (1/2 inch to 12 inch) for flange sealing rings. PTFE Backup Rings, Guide Rings, and Wear Rings are manufactured from 5mm ID to customer specifications. Custom sizes are available from drawings.
What is the difference between Full Face and Ring Type PTFE Ring?
Full Face PTFE Rings cover the complete flange face including bolt holes — used with flat-face flanges. Ring Type PTFE Rings fit between raised faces inside the bolt circle — used with raised-face flanges in steel and stainless steel piping systems.
Do you export PTFE Rings to UAE and Middle East?
Yes. We regularly export PTFE Rings — Full Face, Ring Type, Envelope, Expanded, and Backup Rings — to UAE, Saudi Arabia, Qatar, Oman, Bahrain, Kuwait, and across the Middle East.
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