O'Rings and Seals

H.E.R.S. Inc. offers a variety of o'rings and seals. We have several o'rings, poly seals, wipers, and much more in stock.

Listed below you will find a general purpose guide to help you determine what type of material may be required for your application. H.E.R.S. Inc. does not sell o'rings or seals that will be used in brake applications.

 

Elastomer
(Temp. Range)
Recommended
For

Not
Recommended

For

Part Number
Description
Notes

Buna N

Nitrile NBR

(-65 °to 275°)

General Purpose

Petroleum oil,
fluids, cold water
& plumbing

Phosphate Ester

Skydrol Fluids

Auto Brake Fluid

Ozone Synthetics

4000-70

4900-70

None
Most Popular

Fluorocarbon

Viton

Fluorel (FKM)

(-15 ° to 450°)

High Temperature

Chemical Resistant

Compression Set Resistance

Petroleum Oils

Phosphate Ester

(Skydrol Fluids)

9000-75

9009-90

9005-75

Black

90 Duro Black

Brown

2nd Popular

Silicone

(SI)

(-65° to 450°)

Dry Heat

High Analine

Points Oils

Chlorinated

Di-phenyls

Static Application

Most Petrolem

Fluids, Ketones,

Mek, Acetone,

Water, Steam Dynamic Applications

1235-60

1200-70

1201-70

FDA

Generic Non FDA

Poor tear resistance and abrasion.

Poor Strength.

Poor in Dynamic Service.

Ethylene

Propylene

EPM EPDM

(-65° to 300°)

Most Phosphate

Ester (Skydroll)

Steam (+400°)

Water

Some Phosphate

Ester (Hydraul)

Petroleum Oils

Di-Ester Base

5601-70

5600-70

Generic
     

Neoprene

Chloroprene

(CR)

(-65° to 300°)

Refrigerants

Freon, Ammonia

Food Service

Mild Acid Resistant

Phosphate Ester

3110-70

3100-70

None
Pre-dates Buna for General Service

Urethane or

Polyurethane
(-40° to 300°)

(temp. varies)

High Pressure

Abrasion

Resistance

Oil Resistance

Ozone

Tear Resistance

Water and Steam

1015-70

1016-90

None
Cut resistance High Tensile and Elongation

How to Measure a O'ring.

O'rings are measured by cross section, width and inside diameter. Dimensions are given in inches or millimeters.

After you have determined what type of material and dimensions give us a call for cost and availability.

 

H.E.R.S. Inc.also has poly-paks, back-up rings, quad rings, piston rings and many other seals in stock.


Have any questions?.Contact Us.

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