Flat 5mm O-ring Rubber

 flat 5mm o-ring rubber

1.Material: BUNA,SILICONE ,VITON,EPDM,HNBE ,FKM,etc

2.Standard: GB, JIS,EUROPEAN

3.Color:red, yellow ,green, black ,brown, etc

4.Hardness: 20 shoreA to 90 shore A.

5.Working temperature: 40℃ to 120℃ for NBR, -120℃ to 280℃ for silicone, 25℃ to 230℃ for viton.

6.Application: Mechanical Sealing, Fixed Sealing, Shaft Sealing, Hole Sealing, Eauipment sealing ,Dust Prevention Sealing, Pump Sealing, Flange Sealing, Hydro sealing, Junction Surface Sealing and etc.

7.Customized drawing and specifications are accepted ,

8.Packing:pp bag+carton box with or without pallet

Miain products :

1.O Rings: NBR o ring, Silicone o ring, Viton o ring, EPDM o ring, HNBR O ring and all the other rubber materials o ring at different sizes in AS568, JIS, European and Chinese Standard.
2. O ring kits : 5A 382pc, 5B 382Pc, 5C 386Pc, 8B 407Pc, 8C 419Pc and 50Pc, 222Pc, 225Pc, 270Pc Assortment in both metric and BSP sizes. or make the assortment as your need .

3.Engineering Machinery(Excavator) transparent o ring kits : Komatsu 435pcs, Caterpillar Hitachi 383pcs,396pcs ,  Kobelco 447pcs, Sumitomo 447pcs/666pcs, Kato, Daewoo, Hyundai and Volvo brand 376pcs . Upgraded version also available

How to choosed material:

• Fluoroelastomer (FKM): noted for their very high resistance to heat and a wide variety of chemicals. Other key benefits include excellent resistance to aging and ozone, very low gas permeability and the fact that the materials are self-extinguishing. Standard FKM materials have excellent resistance to mineral oils and greases, aliphatic, aromatic and chlorinated hydrocarbons, fuels, non-flammable hydraulic fluids (HFD) and many organic solvents and chemicals. Generally not resistant to hot water, steam, polar solvents, glycol-based brake fluids and low molecular weight organic acids. In addition to the standard FKM materials, a number of specialty materials with different monomer compositions and fluorine content (65% to 71%) are available that offer improved chemical or temperature resistance and/or better low temperature performance.
• Nitrile rubber (NBR, HNBR, HSN): a common material for o-rings because of its good mechanical properties, its resistance to lubricants and greases, and its relatively low cost. The physical and chemical resistance properties of NBR materials are determined by the acrylonitrile (ACN) content of the base polymer: low content ensures good flexibility at low temperatures, but offers limited resistance to oils and fuels. As the ACN content increases, the low temperature flexibility reduces and the resistance to oils and fuels improves. Physical and chemical resistance properties of NBR materials are also affected by the cure system of the polymer. Peroxide-cured materials have improved physical properties, chemical resistance and thermal properties, as compared to sulfur-donor-cured materials. Standard grades of NBR are typically resistant to mineral oil-based lubricants and greases, many grades of hydraulic fluids, aliphatic hydrocarbons, silicone oils and greases and water to about 80 °C. NBR is generally not resistant to aromatic and chlorinated hydrocarbons, fuels with a high aromatic content, polar solvents, glycol-based brake fluids and non-flammable hydraulic fluids (HFD).
• NBR also has low resistance to ozone, weathering and aging. HNBR has considerable improvement of the resistance to heat, ozone and aging, and gives it good mechanical properties
• Silicone rubber (SiR): noted for their ability to be used over a wide temperature range and for excellent resistance to ozone, weathering and aging. Compared with most other sealing elastomers, the physical properties of silicones are poor. Generally, silicone materials are physiologically harmless so they are commonly used by the food and drug industries. Standard silicones are resistant to water (to 100 °C), aliphatic engine and transmission oils and animal and plant oils and fats. Silicones are generally not resistant to fuels, aromatic mineral oils, steam (short term to 120 °C is possible), silicone oils and greases, acids or alkalis. Fluorosilicone elastomers are far more resistant to oils and fuels. The temperature range of applications is somewhat more restricted

 Chemical Compatibility:

• Air, 200 - 300 °F – Silicone
• Beer - EPDM
• Chlorine Water – Viton (FKM)
• Gasoline – Buna-N or Viton (FKM)
• Hydraulic Oil (Petroleum Base, Industrial) – Buna-N
• Hydraulic Oils (Synthetic Base) – Viton
• Water – EPDM
• Motor Oils – Buna-N

some detaied size :

 Application: