Rings | DCW

O-Ring & Back-up Ring

PTFE O Ring is mainly used for static sealing application in pipes, cylinders, bushings, stems, flanges and connections. Where chemical and physical inertia, as well as resistance to friction, temperature and ageing,  are particularly strategic.

Backup rings are not seals themselves, but are used in conjunction with O-rings or other seals in high-pressure applications. Backup rings are installed in the downstream side of the gland, however, can be installed either side of the O-ring to give a high-performance double-acting seal.

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Why Order from Us?

For over one decade, Dechengwang has been a leader in servicing and supplying our customers with only the best quality O-Rings and machined plastics all at competitive pricing. With so many applications across so many industries, it’s easy to see why manufacturers turn to PTFE or compounding O-rings when they seek a quality sealing solution. You can find our O-rings perform well in such industries as:

  • Food and beverage
  • Mechanical Engineering
  • Automotive
  • Electronics & Semiconductors
  • Aerospace
  • Oil & Gas

Designed for Your Application

  • Low friction coefficient
  • Functions at temperature extremes
  • Excellent moisture resistance
  • Good cryogenic capabilities
  • Good tensile strength

Samples of Our Work, RoHS & FDA Compliant

PTFE back up rings

PTFE back up rings

PTFE Guide Ring

PTFE Guide Ring

PTFE O Ring

PTFE O Ring

PTFE Piston Rings

PTFE Piston Rings

PTFE Ring

PTFE Ring

PTFE Rings

PTFE Rings

PTFE v ring

PTFE v ring

O-Ring & Back-up Ring Materials Selections

Material NameCompound %Main PropertiesColor
PTFE/Very low coefficient of friction and excellent chemical resistance.

FDA approved.

White
Glass Filled PTFEUp to 40%Improved ware resistance, compression strength, creep resistance, chemical resistance. Good performance in oxidising environment, good creep resistance.White cream
Carbon Filled PTFEUp to 35%Improved electrical and termal conductivity, resistance to load, low coefficient of friction in dry, water, steam applications, chemical resistance. Superior ware resistance increase and low friction properties.Black
Graphite Filled PTFEUp to 25%Improve wear resistance, decrease friction and increase sliding properties against soft metals- chemical inertness. Improve the temperature resistance in some way.Black
Bronze Filled PTFEUp to 60%Improved compression strength, wear resistant, high thermal conductivity, resistance to abrasion. Reduced chemical resistance.Dark Brown
Molybdenum disulphide(MoS2) Filled PTFEup to 5%Increased PTFE properties of hardness and wear resistance. Increased sliding properties and decrease friction.Blue azure
PEEK Filled PTFEUp to 20%Increased thermal resistance, sliding properties, surface hardness. Superior properties on dynamic applications.Light Brown
PEEK/Excellent mechanical properties including strength, rigidity, impact resistance, low wear rate and low coefficient of friction, retained over a wide range of service temperatures.Light Brown
PEEK compound/Improves technical and chemical properties like deformation under load, wear resistance, thermal expansion and electrical conductivity./
PVDF/Resistant to UV radiation and offers high mechanical strength and abrasion resistance.Beige
PCTFE/Better mechanical properties than other fluoropolymers, low permeability.Translucent
PFA/Excellent chemical and temperature resistance, electrical insulation and excellent processabilityNatural

Industrial Customization

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Custom Performance & Design

In house material compound capability and rich experience in PTFE filed can full fill your PTFE project.

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Small or Large Order

We offer on-demand manufacturing according to your actual order volume. No business too small.

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Custom Machining

We'll review your volume & design, to determine a most cost-effective approach to your PTFE part production from our in house PTFE compression molding and PTFE machining.