PTFE O-Rings

PTFE O-Rings

PTFE O-Rings are solid fluoropolymer sealing rings designed for static sealing applications requiring chemical resistance and thermal stability. Made from solid PTFE, they are suitable for flanges, covers, instrument housings and chemical handling equipment where low friction, low moisture absorption and broad media compatibility are required. Available in AS568 reference sizes and custom machined dimensions, PTFE O-rings can be selected according to ID × CS dimensions, groove design, tolerances and operating conditions.

Деталь продукта

Product Overview

Solid fluoropolymer rings for chemical resistant static sealing

Yozonetech PTFE O-rings provide a solid fluoropolymer sealing option for flanges, covers and other static joints exposed to demanding chemical or thermal conditions. Specify a standard reference size or submit a drawing for review against your equipment and service conditions.

Request a quote: ptfetube@yozonetech.cn

Product Benefits

  • Broad chemical resistance for many process media, subject to compatibility review.
  • Low surface friction and low adhesion at the sealing interface.
  • Resistance to weathering and ozone, with low moisture absorption.
  • A solid PTFE construction for applications requiring a fluoropolymer contact surface.

Technical Selection Data

Параметр Reference and selection requirement
Материал Solid PTFE; specify virgin unfilled grade or any required formulation
Cross section Circular; size specified as ID × CS
Primary service Static sealing, including accessible flange and cover joints
Temperature reference Approximately -200°C to +200°C; some applications up to +260°C. Confirm the actual seal design and service envelope
Pressure rating Determined by groove, clearances, temperature and loading; confirm for the complete assembly
Elastic recovery Low compared with rubber; allow for creep and permanent deformation under load
Chemical limitations Check molten alkali metals, elemental fluorine and other exceptional media individually
Dimensions and tolerances AS568 reference sizes or drawing dimensions; machining tolerances agreed at quotation

Temperature figures are published material and application references, not a guaranteed operating range for every Yozonetech ring. Temperature, pressure and media must be reviewed together. This product is a solid PTFE ring; encapsulated elastomer rings require a separate specification.

Common AS568 Size Reference

90 selected sizes for quotation and design review. ID = inside diameter; CS = circular cross-section diameter. All dimensions below are in mm. Outside diameter is calculated as OD = ID + 2 × CS.

AS568 ID mm CS mm AS568 ID mm CS mm AS568 ID mm CS mm
006 2.90 1.78 102 1.24 2.62 201 4.34 3.53
007 3.68 1.78 103 2.06 2.62 202 5.94 3.53
008 4.47 1.78 104 2.84 2.62 203 7.52 3.53
009 5.28 1.78 105 3.63 2.62 204 9.12 3.53
010 6.07 1.78 106 4.42 2.62 205 10.69 3.53
011 7.65 1.78 107 5.23 2.62 206 12.29 3.53
012 9.25 1.78 108 6.02 2.62 207 13.87 3.53
013 10.82 1.78 109 7.59 2.62 208 15.47 3.53
014 12.42 1.78 110 9.19 2.62 209 17.04 3.53
015 14.00 1.78 111 10.77 2.62 210 18.64 3.53
016 15.60 1.78 112 12.37 2.62 211 20.22 3.53
017 17.17 1.78 113 13.94 2.62 212 21.82 3.53
018 18.77 1.78 114 15.54 2.62 213 23.39 3.53
019 20.35 1.78 115 17.12 2.62 214 24.99 3.53
020 21.95 1.78 116 18.72 2.62 215 26.57 3.53
021 23.52 1.78 117 20.29 2.62 216 28.17 3.53
022 25.12 1.78 118 21.89 2.62 217 29.74 3.53
023 26.70 1.78 119 23.47 2.62 218 31.34 3.53
024 28.30 1.78 120 25.07 2.62 219 32.92 3.53
025 29.87 1.78 121 26.64 2.62 220 34.52 3.53
026 31.47 1.78 122 28.24 2.62 221 36.09 3.53
027 33.05 1.78 123 29.82 2.62 222 37.69 3.53
028 34.65 1.78 124 31.42 2.62 223 40.87 3.53
029 37.82 1.78 125 32.99 2.62 224 44.04 3.53
030 41.00 1.78 126 34.59 2.62 225 47.22 3.53
031 44.17 1.78 127 36.17 2.62 226 50.39 3.53
032 47.35 1.78 128 37.77 2.62 227 53.57 3.53
033 50.52 1.78 129 39.34 2.62 228 56.74 3.53
034 53.70 1.78 130 40.94 2.62 229 59.92 3.53
035 56.87 1.78 131 42.52 2.62 230 63.09 3.53

Read each three-column group independently. Example: AS568-214 has ID 24.99 mm and CS 3.53 mm, giving a calculated OD of 32.05 mm. These are AS568 reference dimensions expressed in millimetres, not a separate metric size standard.

AS568 numbers identify the reference geometry only. For solid PTFE, confirm the machined dimensions, tolerances and groove design on the order drawing; elastomer installation stretch and tolerance assumptions must not be applied automatically.

For other AS568 sizes, larger cross sections or custom metric dimensions, send ID × CS, tolerances and quantity for feasibility and availability confirmation.

Приложения

Consider solid PTFE O-rings for static joints in chemical handling equipment, instrument housings, vessel covers and flanged connections where material compatibility is essential. Use the actual process fluid and cleaning cycle to define the seal specification.

Groove Design and Installation

PTFE has limited stretch and recovery. Prefer an accessible groove that allows installation without forcing the ring over a large shoulder. Check the drawing, sealing surfaces, compression and assembly clearances before installation.

Account for creep under sustained load and for changes in dimensions during thermal cycling. Rubber O-ring stretch rules are not a substitute for a PTFE-specific design review. Moving or repeatedly cycling interfaces require a seal construction developed for that duty.

Custom Dimensions and Inspection

Send the finished ID, CS, tolerances and groove drawing for a custom size review. Define surface finish, cleanliness and material identification requirements with the order. Agree dimensional and visual inspection criteria and any finished-assembly leak test.

Frequently Asked Questions

Is this an encapsulated O ring

No. It is solid PTFE throughout its cross section. A fluoropolymer-jacketed ring with an elastomer core is a different construction with different installation and recovery behavior.

Can PTFE replace a rubber O ring of the same size

Matching ID and CS is only the first check. Review the groove, assembly access and required recovery because solid PTFE behaves differently from rubber.

Can the ring operate continuously at 260°C

The upper reference is application-dependent. Confirm the permitted temperature and pressure combination for the selected material, groove and medium before specifying continuous service.

Are all listed sizes available from stock

The chart provides common reference dimensions. Availability, tolerances and lead time are confirmed with the quotation.

Request a PTFE O Ring Quote

Send the AS568 number or ID × CS, quantity and drawing. Include the medium and concentration, normal and peak temperature, pressure or vacuum, groove dimensions and required inspection or compliance documents.

Электронная почта: ptfetube@yozonetech.cn

WhatsApp / Tel / WeChat: +86 13752771911

Website: www.chinaptfetube.com

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