PTFE Gasket Manufacturer

PTFE Gasket — OEM PTFE component, HEMSUN ENGG. INDUSTRIES Ahmedabad

PTFE Gasket — Material Specifications, Engineering Data & OEM Supply

PTFE Gasket is manufactured in Gujarat by HEMSUN ENGG. INDUSTRIES, providing tight dimensional accuracy and long service life in flange gaskets and flat seals. Features premium PTFE fluoropolymer compounding, void-free sintering, and precision CMM inspection.

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Applications

Where PTFE Gasket is used

Static face seal between flanges, compressed to fill surface irregularities and hold a joint tight through thermal cycling.

PTFE suits flange gaskets because it deforms enough under bolt load to conform to face imperfections, then holds without relaxing chemically.

Supplied to drawing across the published range — Standard sizes: DN10 to DN500 per ASME B16.21 and DIN EN 1514-1; Material: Virgin PTFE / Filled PTFE / Food Grade PTFE — with dimensional and material reports on request.

Features

Key properties

Types

Full Face, Ring Type, Envelope, Expanded, Filled, Food Grade, Custom

Standard sizes

DN10 to DN500 per ASME B16.21 and DIN EN 1514-1

Inner Diameter

10mm to 1000mm

Outer Diameter

20mm to 1500mm

Thickness

0.5mm to 20mm

Material

Virgin PTFE / Filled PTFE / Food Grade PTFE

Temperature range

-200°C to +260°C

Full chemical resistance pH 0 to 14

all acids, alkalis, solvents

FDA Compliance

Food Grade PTFE Gasket available on request

Leakage Performance

zero leakage sealing across all flange types

Custom Sizing

cut to drawing or sample

IEC registered

export-ready quality

Specifications

Property	Value
Component Type & Grade	PTFE Gasket (Specification Code HES-317)
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

Process

Manufacturing process

Our dedicated manufacturing cells produce PTFE Gasket 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

Material selection notes

Featuring FDA-compliant virgin PTFE fluoropolymer or specialized filled compounds, PTFE Gasket 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.

Selection

How to specify your order

To evaluate PTFE Gasket 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

Quality checks and inspection

Quality assurance for PTFE Gasket 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.

Supply

Ordering and export documentation

Domestic PTFE Gasket 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. Air and sea freight packing with desiccant and shock protection for international buyers Contact info@hemsun.com or sales@hemsun.com with your gaskets specification.

Export

Export packing and lead time

Export customers receive complete logistics assistance for PTFE Gasket, including FOB/CIF shipping quotes, express air courier delivery for prototype samples, and secure sea-freight container packing with full batch traceability.

Care

Storage and handling

Storage and operating notes for PTFE Gasket: 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

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 the difference between Full Face and Ring Type PTFE Gasket?

Full Face PTFE Gaskets cover the entire flange face including bolt holes — used with flat-face flanges (glass-lined equipment, FRP, cast iron). Ring Type PTFE Gaskets fit only between the raised faces inside the bolt circle — used with raised-face steel and stainless steel flanges in standard process piping.

What is an Envelope PTFE Gasket and where is it used?

An Envelope PTFE Gasket has a thin PTFE outer shell encasing a compressible inner core of non-asbestos fibre, rubber, or corrugated metal. It provides PTFE chemical resistance in contact with process media while the core delivers compression resilience — the standard gasket for glass-lined reactor nozzles and enamelled vessel flanges (DIN 28148 standard).

What flange standards do your PTFE Gaskets comply with?

Our PTFE Gaskets are manufactured to ASME B16.21, DIN EN 1514-1, DIN 28148, and ANSI B16.5 standards. Standard sizes DN10 to DN500. Custom non-standard sizes are available from customer drawings.

Do you supply Food Grade PTFE Gaskets for export?

Yes. Our Food Grade PTFE Gaskets are manufactured from FDA 21 CFR compliant virgin PTFE and exported to USA, Germany, Japan, UAE, Singapore, and Brazil for food pipeline, dairy, and pharmaceutical process applications.

PTFE Gasket

Where PTFE Gasket is used

Static face seal between flanges, compressed to fill surface irregularities and hold a joint tight through thermal cycling.

PTFE suits flange gaskets because it deforms enough under bolt load to conform to face imperfections, then holds without relaxing chemically.

Supplied to drawing across the published range — Standard sizes: DN10 to DN500 per ASME B16.21 and DIN EN 1514-1; Material: Virgin PTFE / Filled PTFE / Food Grade PTFE — with dimensional and material reports on request.