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O-Rings
Description: An O-ring is a torus, or doughnut-shaped object, generally made from an elastomer, though O-rings are made in PTFE and other plastic type materials such as: Neoprene, Nitrile (Buna-N) with temprature range of -40to+250F, Dupont-Dow Viton® with exceptional chemical resistance, Silicone, Teflon®, Butyl, Urethane, Fluorosilicone, or Kalrez®, both hollow and solid. They are used primarily for sealing. Another use is for light duty drive belts.
Basic Principles:
An O-ring seal is a means for closing off a passageway preventing an unwanted escape or loss of fluid or gas. The seal consists of an O-ring installed in a gland and is exactly that - a circular run in which the elastomeric material has a section that is virtually a circle. The gland is the cavity (usually within metal) into which the O-ring is placed. The combination of these two elements comprises an O-ring seal.
Operation:
All fluid-tight seals are characterized by the absence of any passage by which fluid might escape. detail differences exist in the manner by which zero clearance is obtained - welding, brazing, soldering, ground or lapped fits or the yielding of a softer material wholly or partially confined between two harder and stiffer member of the structure. The O-ring seal falls in the latter class. The rubber seal should be considered as an incompressible, viscous fluid having a very high surface tension.
How To Order: Know the inside diameter (ID), the outside diameter (OD) the cross section (CS) diameter (W), and the compound (rubber material) from which it is to be made, these three pieces of information are necessary to describe the O-ring. |
Characteristics
Elastomers have a large use in electric and electronic fields due to their dielectric characteristics and versatility.
Typically, the attention of the project engineer is focused on the electric insulation obtainable with rubber. On request, rubber can also be supplied as an electric conductor or anti static, by means of special additives to the compound.
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NBR 70 |
Nitrile |
Excellent mechanical strength and resistance to wear, mineral oils, heat.
Poor resistance to fuels and out-door weather. |
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EPDM 70 |
Neoprene |
Good resistance to water, steam, brake fluids, alkalies and diluted acids.
Outstanding weather resistance. |
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HNBR 70 |
Hydrogenated Nitrile |
Very good mechanical characteristics.
Wear, ozone and high temperature aging resistance.
Recommended for fuels and oils contact.
Low gas permeability. Good for high and low temperature.
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MVQ 70 |
Silicone |
Very good heat and chemical resistance.
Recommended for food contact. Poor mechanical characteristics. |
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FKM 75 |
Fluorocarbon Rubber |
High temperature resistance. Very good chemical resistance. Poor low temperature flexibility. |
Industry Applications
Scientific, medical, military, mechanical, industrial, commercial usages needing high pressure applications, chemical resistant applications, and high temprature applications.
O-Rings
Available in a variety of dimensions, call, fax or email your order in with OD (outside diameter) ID (inside diameter), CS (cross section) & type of compound: PTFE, Neoprene, Nitrile (Buna-N), Viton®, Silicone, Teflon®, Butyl, Urethane, Fluorosilicone, or Kalrez®.
Inquire about this product
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